Yearly Archives: 2011 - Page 35

Around the Web; and Is There a Fat Mass Setpoint?

Posted by on February 26, 2011 15 comments

[1] CoQ10 and niacin not good for Top Gun pilots: You don’t get useful supplement information like this at other Paleo sites.

The case presented here details a Naval Aviator who experienced reduced G tolerance over two successive flights with a temporal relationship of starting a new supplement. Two components of the supplement, coenzyme Q10 and niacin, are highlighted here for their hemodynamic effects. After stopping the supplement the aviator regained his normal G tolerance and had no further issues in flight.

Barker PD. Reduced G tolerance associated with supplement use. Aviat Space Environ Med. 2011 Feb;82(2):140-3. http://pmid.us/21329031.

[2] Thank you, science, this is helpful:

[3] N-acetylcysteine and choline reverse insulin resistance in rats. This is for biology junkies. How does physiological insulin resistance get reversed? Feeding signals do it, and cysteine and choline may be primary signals. Also, there is liver and brain involvement, since denervation of the liver causes insulin resistance. A hypothesis: there is a “hepatic insulin sensitizing substance” (HISS).

Lautt WW et al. Bethanechol and N-acetylcysteine mimic feeding signals and reverse insulin resistance in fasted and sucrose-induced diabetic rats. Can J Physiol Pharmacol. 2011 Feb;89(2):135-42. http://pmid.us/21326345.

[4] Do eggs eliminate need for carbohydrates? Seth Roberts recounts an interesting n=1 experience:

Joseph Buchignani … discovered that a meat-only diet eliminated his IBS. However, it also caused craving for carbs. Because carbs caused IBS, he couldn’t simply eat carbs. He tried many ways of getting rid of the craving for carbs: eating more animal fat, eating less animal fat, eating oil, eating lard, and eating different kinds of animals and cuts of meat. He varied how he cooked the meat, eating especially fresh meat, and eating fresh whole fish. All of these attempts failed. He did not try taking a multivitamin pill.

Finally he tried adding egg to the meat. That eliminated his craving for carbs…

Sure, some cravings reflect nutrient deficiencies. (Not all cravings: An alcoholic craves alcohol.) But in the cases I know about, there is an obvious or semi-obvious connection between the craving and the deficiency. For example, people who chew too much ice (pagophagia) crave ice to chew. They are iron-deficient. Eating iron eliminates the pagophagia. Long ago, a craving to eat something crunchy would have led you to eat bones. Bone marrow is high in iron. So the craving makes sense. In contrast, there is no obvious or semi-obvious connection between carbs and eggs.

The explanation for Mr. Buchignani’s experience is not obvious to me either. However, here’s a hypothesis:  Eggs are rich in cysteine and choline, so maybe they give an especially strong feeding signal that over-rides the appetite signal generated by carbohydrate deficiency.

[5] We need a good mucus barrier to prevent self-digestion. Every once in a while I assert in the comments that we need a good mucus barrier to protect our own cells from digestive enzymes, and so people with bowel problems (hence a deficient mucus barrier) should be cautious about taking protease or lipase enzymes. Then somebody asks for a reference (tough crowd!).

Well, here’s a paper that came out this week. It’s about proteases. The new part to me was that NAC is mucolytic and aggravates the injury. So reversing your insulin resistance with NAC might damage your gut … trade-offs, trade-offs.

Qin X et al. The Mucus Layer is Critical in Protecting Against Ischemia-Reperfusion-Mediated Gut Injury and in the Restitution of Gut Barrier Function. Shock. 2011 Mar;35(3):275-281. http://pmid.us/20856173.

[6] Most pesticide-contaminated vegetable? Celery. “This stalky vegetable tops the dirty list. Research showed that a single celery stalk had 13 pesticides, while, on the whole, celery contained as many as 67 pesticides.”

[7] Paleo cavities and chronic infections: Rhodesian Man, dated to between 125,000 and 300,000 BC, had cavities in ten upper teeth and pitting in his skull indicates he was probably killed by a chronic dental or ear infection. Paleo diets were not a cure-all for infectious disease. Via Melissa McEwen.

[8] Love in nature:

(Via Yves Smith)

[9] Vegan recovers health by eating animal foods: That’s not news. But she wrote a beautiful essay:

I wanted desperately for it to be right, for my ethics to outweigh my physiology.

Then she got death threats.

(Via Newmark’s Door)

[10] Shows how out of touch I am: If Richard Nikoley hadn’t blogged about it, I wouldn’t have known he has detractors. Whatever for? Has he been teasing the vegans again?

[11] Does the body have a fat mass setpoint? Pål Jåbekk of Ramblings of a Carnivore has a discussion of why the word “setpoint” may mislead. I agree – fat mass “equilibrium” or leptin “target” would probably be better words.

Pål objects to the setpoint language because he thinks it has encouraged a simple fat in / fat out mechanistic view of weight gain, and promotes a therapy of “starve and do insane amounts of exercise.” Pål suggests instead a lake metaphor:

When it comes to the body fat setpoint, I rather like the lake comparison. A lake can for those less informed seem to have a set point of water level. Despite rather large fluctuations in temperature, evaporation and water going into and out of the lake, the lake maintains it water level because the factors mostly responsible for the level influence each other. This does not mean that it is difficult to change the level, nor does it mean the lake “attempts to defend against change.” Build a damn dam and the water level will go up. Drain it, and the level goes down. It’s not very hard, you just have to push the right buttons.

I like this metaphor because it expresses the equilibrium concept – fat mass is in equilibrium the way water in the lake is in equilibrium; the equilibrium can change. On the other hand, the way to adjust water level is to reduce water in and increase water out. Doesn’t this metaphor promote the calories in / calories out view? And isn’t that the view that suggested the failed “starve and do insane amounts of exercise” weight loss regimen?

My conclusion: Semantic disagreements can be hard to resolve!

(Note to readers: For our thoughts on how to lose weight, peruse the “Weight Loss” category).

[12] Weekly video: The Cleveland zoo discovers that gorillas get healthier when they eat natural foods instead of sugary biscuits. This is a revelation to zoology:

(Via John Durant)

Ketogenic Diets, I: Ways to Make a Diet Ketogenic

Posted by on February 24, 2011 159 comments

I was going to write a single post about how to implement a therapeutic ketogenic (ketone-generating) diet.

But then I thought it was worth spelling out issues in some detail. There are various ways to make a diet ketogenic, and different ways are appropriate in different diseases. Also, different diseases may call for a different balance between three criteria:

1)      Safety. Does the diet generate side effects?

2)      Therapy. Is the diet as curative as it can be?

3)      Pleasurability and practicality. Is the diet unnecessarily expensive, unpalatable, or boring?

I soon realized that with so many factors affecting diet design, it would be hard to fit everything into a single post. So I’m going to split up the discussion into parts. Today I’ll look at the various ways to make a diet ketogenic. On Tuesday I’ll look at how to design a diet for Kindy’s NBIA kids. We’ll look at what they’re eating now, and consider ways they might be able to improve their diets further – and, hopefully, get further improvements in health, longevity, and function.

Maybe we’ll look at some other diseases after that, or maybe I’ll just move on to the lemon juice series I’ve been planning. The lemon juice and acid-base balance issues will fit in nicely since kidney stones and acidosis are risks of ketogenic diets and lemon juice relieves those risks.

So: how can we make a diet ketogenic?

What Is a Ketone?

The liver is responsible for making sure that the body (but especially the brain and heart) have access to a sufficient supply of energy from the blood. To fulfill that responsibility, it manufactures two energy substrates – glucose and ketones – and exports them into the blood as needed.

The most important ketones are acetoacetic acid and beta-hydroxybutyric acid.

Ketones are water-soluble small molecules. They diffuse throughout the body into cells, and are taken up by mitochondria and oxidized for energy.

Ketones are especially important to neurons, which can only consume glucose or ketones. So if something is wrong with glucose metabolism, ketones can be the sole usable energy source of neurons. (Other cell types, but not neurons, burn fats.)

Manufacture of Glucose and Ketones During Starvation

While preparing this post, I was surprised at how long it took for doctors to appreciate that ketones are an acceptable alternative energy source for the brain. The realization that the brain doesn’t perpetually rely on glucose during starvation apparently didn’t sink in until 1967!

The use of prolonged starvation for the treatment of obesity has posed a fascinating problem; namely, that man is capable of fasting for periods of time beyond which he would have utilized all of his carbohydrate resources and all of his proteins for gluconeogenesis in order to provide adequate calories as glucose for the central nervous system.

This study was designed to clarify the apparent paradox, and it was found that beta-hydroxybutyrate and acetoacetate replace glucose as the brain’s primary fuel during starvation. [1]

This makes it a bit easier to understand why ketogenic diets have not yet become standard therapies for neurological diseases. Epileptics caught a lucky break – the ketogenic diet was already in use for epilepsy in the 1920s. The ketogenic diet’s therapeutic potential for other neurological disorders probably couldn’t have been appreciated until after 1967, and by then medicine had turned its back on dietary therapy.

But back to ketones. During starvation, glucose and ketones have to be manufactured from body parts. The body’s resources include:

  • Glycogen – a storage form of glucose. However, glycogen supplies are minimal.
  • “Complete” protein – a mix of amino acids similar to that found in animal meats.
  • Long-chain fats – fatty acids 14-carbons or longer in length, attached to a glycerol backbone as either triglycerides or phospholipids.

During starvation, different raw materials end up as different energy substrates:

  • Glycogen can be used to make glucose but not ketones. So glycogen converts 100% to glucose.
  • Protein is broken down into its constituent amino acids. Some amino acids can become glucose but never ketones; some can become either; some can become ketones but glucose. “Complete” protein usually found in the body typically converts 46% to ketones, 54% to glucose. [UPDATE: Actually, this is incorrect. As Tony Mach points out in the comments, complete protein converts 20% to ketones, 80% to glucose. The 46-54 ratio is the contribution to Wilder’s ketogenic ratio, see below.]
  • Triglycerides and phospholipids are broken up into their constituent parts. The fatty acids can make ketones but not glucose; the glycerol backbones can make glucose but not ketones. Typically, 10-12% of energy from a triglyceride is in the form of glycerol (which has the potential to become glucose) and 88-90% is in the form of fatty acids (which have the potential to become ketones).

As we note in the book, during starvation the body is cannibalizing tissues that are roughly 74% fat, 26% protein by calories. Due to the preponderance of fat, starvation is highly “ketogenic” (ketone generating). The 26% of calories that are protein generate roughly equal amounts of ketones and glucose, but the 74% of calories that are fat generate only ketones.

This doesn’t mean that during starvation ketones are 87% of energy and glucose 13% of energy. Most of the fats are burnt directly for energy without conversion to ketones. But a fair amount of fats are diverted into ketone production, and ketones are abundant during starvation.

A Ketogenic Diet Using “Body Part Foods”

If your diet could include only compounds found in the body – glucose, complete protein, and long-chain fats stored as triglycerides or phospholipids – then we can use the above numbers to estimate the “ketogenic potential” of the diet.

I have to credit commenter “Cathy” at the PaNu Forum for this next part. Kindy posted a question about the ketogenic diet for NBIA on the PaNu Forum in October 2010, and Cathy left an informative comment:

The ketogenic formula was originally developed by Wilder at the Mayo clinic in the 1920’s. By googling WILDER KETOGENIC FORMULA, I found a link to the book “The Ketogenic Diet: A Treatment for Epilepsy” published in 2000. Quite a bit of the book is available for reading online; here is the URL

.

On page 36 of this book is Wilder’s formula for the ketogenic potential of a diet:

This formula basically treats all fats as triglycerides of long-chain fatty acids, and protein as “complete” protein with a typical mix of amino acids. It makes a ratio of the ketone precursors to the glucose precursors.

Wilder’s “ketogenic ratio” was used by Dr. Richard Bernstein in his Diabetes Solution to help people appraise the ketogenicity of a diet. A ratio below 1.5 signifies a minimally ketogenic diet; the higher the ratio goes above 1.5, the more ketones will be generated.

Other Dietary Ketone Precursors

If you’re not starving, you have the opportunity to eat foods that are not components of the body, and that are more ketogenic than “body part foods.”

Specifically, you can eat:

  • Short-chain fats such as are found in coconut oil.
  • A mix of amino acids that is not “complete,” but is biased toward the ketogenic amino acids.

If you do this then your diet will be more ketogenic than Wilder’s formula would suggest.

Eating these foods may be advantageous. For instance, suppose you want to eat enough carbs to avoid “zero-carb dangers” such as mucus deficiency. At the same time, you want to generate abundant ketones to nourish the brain. You can achieve both by eating carbs for glucose, but also eating short-chain fats and ketogenic amino acids to make ketones.

So let’s look at why these foods are so effective at producing ketones.

Amino Acids

The main metabolic process which converts one metabolic substrate into another is called the citric acid cycle, tricarboxylic acid (TCA) cycle, or Krebs cycle.

The TCA cycle looks like this (blue arrows):

The passage from succinyl CoA to fumarate is where ATP is made. The cycle can be fed in several ways:

  • By pyruvate which is an intermediate produced in glucose metabolism;
  • By acetyl CoA which is an intermediate produced by ketones or fatty acid oxidation;
  • By amino acids which can enter the TCA cycle at various points.

The green boxes show glucogenic amino acids entering the cycle. The white boxes show ketogenic amino acids that are made into either acetyl CoA or acetoacetyl CoA and thence can either leave as ketones (via HMG-CoA) or enter the cycle by conversion of acetyl CoA to citrate.

The crucial takeaway, as far as this post is concerned, is the distribution of amino acids among green and white boxes:

  • Leucine and lysine appear only in white boxes, not in green boxes. They are purely ketogenic.
  • Isoleucine, tryptophan, phenylalanine, and tyrosine appear in both green and white boxes. They can be either ketogenic or glucogenic.
  • The other amino acids appear only in green boxes and are purely glucogenic.

So if the diet is rich in leucine and lysine, but poor in glucogenic amino acids, then it will be highly ketogenic.

Short-Chain Fats

Fats are made into acetyl CoA. Acetyl CoA can either enter the TCA cycle or be converted to ketones. What decides which way it goes?

One important factor is whether the cell has enough ATP. If the cell has plenty of ATP then it won’t allow the TCA cycle to make any more, and the TCA cycle gets stuffed with succinyl CoA and then with all the other intermediates in the pipeline behind it.

Once the TCA cycle is full, acetyl CoA no longer enters the cycle and instead leaves as ketones.

Long-chain fats can follow this route, but not terribly easily. They have alternatives:

  • Long-chain fats can serve as structural molecules in cell membranes throughout the body.
  • Long-chain fats can be stored in adipose cells.
  • Long-chain fats can be burned by cells throughout the body, and transported to cells that need them.

These factors mean that you have to eat a very large amount of long-chain fats before you produce substantial ketones.

Short-chain fats (12 carbons or less in length; often called medium-chain) are different. Short-chain fats do not appear in cell membranes and are not stored in adipose tissue (except for a little 12-carbon fatty acids). Rather than being transported throughout the body, they are shunted to the liver for disposal.

This means that if you eat a lot of coconut oil (which is 58% short-chain fats), you deliver a lot of fat to the liver for disposal. The disposal process for fat is conversion to acetyl CoA followed by either burning in the TCA cycle or conversion to ketones.

After a big cup of coconut oil is delivered to the liver, the liver’s ATP levels are quickly saturated. The TCA cycle is stuffed and the liver will dispose of the coconut oil by making ketones.

It will do this whether the rest of the body needs the ketones or not. The liver wants to get rid of the coconut oil, and it does it by making ketones whether the rest of the body wants them or not.

Summary

So we have three ways to make the diet ketogenic:

1)      Make Wilder’s “ketogenic ratio” high by eating a lot of fat, very few carbs, and not too much protein.

2)      Supplement with the ketogenic amino acids lysine and leucine.

3)      Supplement with coconut oil or another source of short-chain fats.

If we do (2) or (3), then the diet can be ketogenic even if it has a fair number of carbs.

So now we have an arsenal of ways to generate ketones. We have to look at diseases and diet risks to figure out which way of making the diet ketogenic is optimal.

I’ll look at that next week.

References

[1] Owen OE et al. Brain metabolism during fasting. J Clin Invest. 1967 Oct;46(10):1589-95. http://pmid.us/6061736.

Ketogenic Diet for NBIA (Neurodegeneration with Brain Iron Accumulation)

Posted by on February 22, 2011 63 comments

It’s always a pleasure to hear from readers who report improved health.

Some of these emails are poignant: distressing because of the pain of their diseases, yet heartening because of the improvements a good diet brings.

It can’t get more poignant than to hear that children with a painful, deadly, and untreatable disease have, thanks to diet, begun smiling, laughing, and getting better.

Last week Kindy Flyvholm, who bought our pre-publication e-book, wrote with just such a report. I’m delighted to be able to pass it on, and hopeful that this report will help other children escape unnecessary suffering and enjoy life more abundantly. Thank you, Kindy, for sharing your story!

Ketogenic diets as therapy for neurological dysfunction

In our book and on this blog, we advise everyone with a neurological or brain disorder to try a ketogenic (“ketone generating”) diet. The book spells out how to tweak the Perfect Health Diet to make it ketogenic: basically, reduce carbs and add copious amounts of coconut oil.

Ketogenic diets can be surprisingly helpful with brain and nerve dysfunctions. The reason is that neurons have very limited metabolic options: they can burn only glucose or ketones. Glucose metabolism is complex and prone to failure; ketone metabolism is simple and robust. Especially in disease states, a neuron on glucose can be a totally different creature from a neuron on ketones. Neurological diseases that are disastrous on a glucose-rich diet can become mild when neurons are fed ketones.

It doesn’t work for every brain disease, in part because ketones don’t diffuse through the brain all that well. Ketones reach the subcortical and inner cortical layers of the brain easily, but don’t readily reach superficial layers. [1] However, in some diseases the places reached by ketones are the ones in trouble. The evolutionarily oldest parts of the brain, such as the brain stem, are the most likely to benefit from a ketogenic diet. Thus, neurodegenerative diseases that cripple the body may be top candidates for a therapeutic ketogenic diet.

NBIA (Neurodegeneration with Brain Iron Accumulation)

One such disease is NBIA, short for Neurodegeneration with Brain Iron Accumulation. NBIA is most commonly caused by a mutation in the gene PANK2, which codes for the mitochondrial enzyme that converts vitamin B5 (pantothenic acid) into CoenzymeA (a crucial metabolic substrate). This version of NBIA is called PKAN, for pantothenate kinase-associated neurodegeneration.

NBIA/PKAN is characterized by an accumulation of iron in the basal ganglia of the brain. The iron is readily visible in brain MRIs, producing an “eye of the tiger” brightness pattern. [2] It produces symptoms that overlap with those of Parkinson’s disease. [3] About 1 in 500 people carries a PANK2 mutation, so some form of the disease strikes 1 in 250,000 people.

The disease typically first presents itself about age 3, when leg dystonia and spasticity causes an impaired gait, sometimes including toe-walking. The disease progresses and children lose the ability to walk. Dystonia extends to the hands and the face; the head cannot be held upright, and swallowing becomes difficult. Blindness from retinopathy and hearing loss often develop. Premature death occurs usually in the teens, often by age 10 or younger. The last years are excruciatingly painful.

Here is a picture of Zach, age 12:

You can see his inability to hold his head upright, and the hand position characteristic of dystonia. Zach cannot swallow naturally and has to be tube-fed.

The bumps in his chest are from the battery packs used to drive a deep brain stimulation device. The idea is to introduce signals that counter the excruciatingly painful dystonic spasms. Like other therapies for NBIA, deep brain stimulation is often ineffective. In Zach’s case, the device worked for less than one month. It is now turned off but is not removed because the operation would be too traumatic.

Ketogenic Diet Therapy

Kindy writes:

It was in desperation that we began researching options (ANY OPTION) to prevent the horrible pain that precedes death especially in the case of children with early-onset NBIA.

Many research paths led to the ketogenic diet being an option.  A lot of discouraging information was presented as well (like how impossible it is to follow or how disruptive it is to family life, etc).

It’s remarkable, but doctors are so divorced from dietary science that they do not know how simple and natural a ketogenic diet can be, and assume that only absurdly onerous formulations are needed. As we point out in the book, a large fraction of mammals eat ketogenic diets as their natural diet; and all mammals including humans subsist on ketones during starvation.

Doctors were pessimistic about its chances, but a ketogenic diet produced amazing results:

My son, who is 6, … has been on the diet for less than one month and his hands have relaxed enough for him to regain his pointing ability (which had been lost).

Zach, the 12 year old on the diet, is much further progressed in the disease.  Zach has been on the diet since late October, 2010, reaching 80% fat levels towards mid-December.  The following are the improvements that have been noted by Zach’s family and therapists:  Zach has begun holding up his head even though his neck has been hyper extended backwards since he was 9, he has begun pointing with his finger again instead of the palm of his hand, he is moving his right arm again some, and the latest thing is that he is now able to go from a laying position to a sitting position on his own by hanging on to something or someone.  He has not done this since he was 9 years old.

Both boys have begun smiling and laughing all the time.

I know just how they feel!

The previous picture was Zach before starting the ketogenic diet. Here he is on the diet:

Kindy continues:

Zach has gotten off all pain medicine and only has a small amount of 3 [anti-spasmodic] medicines left which hopefully he can get off of over the next year.

Going in and out of ketosis has immediate effects, as this anecdote shows:

Zach had a recent day where his muscle spasms returned severely.   Bad enough he needed to go to the hospital for morphine.  At the last minute (before going to the hospital), the parent looked at her recipe for that day and realized she had used a lot of white chicken meat.  She added in some more coconut oil into his next few tube feedings and the spasms went away immediately.  This is extremely powerful.

Kindy concludes:

We are not under any delusions.  Our children may be taken from us at any time.  If they are taken pain free, then we are blessed compared to the alternative.  The situation thus far with our ‘experiment’ has proven much more than we could have hoped.

Conclusion

Kindy, it’s wonderful that your research and perseverance has bought hope to your son, and that you’re spreading the word to help others find the same hope. I’m so grateful that you’ve shared your story with us. Hopefully your experiences will reach the NBIA community, save children from unnecessary pain, and maybe extend their lives significantly!

We salute every parent who has to deal with neurological and genetic diseases in their children. As this disease illustrates, anyone with a neurological disorder should experiment with a ketogenic diet. Ketogenic diets have been tested in very few diseases, and there is no telling how many neurological diseases may prove amenable to this therapy. But there is already considerable evidence that neurological diseases of the elderly, such as Alzheimer’s and Parkinson’s, are treatable with a ketogenic diet.

Last Thursday, I defended the idea of a healthy diet as the best therapy for disease (“Therapy AND Life”). The NBIA kids illustrate just how powerful dietary therapies can be.

Medical doctors seem to have great misapprehensions and fear of experimenting with this diet. They do not understand it, don’t know how it should be implemented, and have never tried it themselves. Many of the medical ketogenic diets are malnourishing and generate terrible side effects. Not surprisingly, many patients quit the diets.

This coming Thursday, I’ll discuss how to implement a safe, healthy, and pleasurable-to-eat ketogenic diet. There’s no reason for an unpalatable or malnourishing diet to stop patients from enjoying the benefits that Zach has seen!

References

[1] Hawkins RA, Biebuyck JF. Ketone bodies are selectively used by individual brain regions. Science. 1979 Jul 20;205(4403):325-7. http://pmid.us/451608.

[2] Gregory AM, Hayflick SJ. Neurodegeneration with brain Iron Accumulation. Orphanet Encyclopedia, September 2004. http://www.orpha.net/data/patho/GB/uk-NBIA.pdf.

[3] Klein C et al. Hereditary parkinsonism: Parkinson disease look-alikes–an algorithm for clinicians to “PARK” genes and beyond. Mov Disord. 2009 Oct 30;24(14):2042-58. http://pmid.us/19735092. Paisán-Ruiz C et al. Early-onset L-dopa-responsive parkinsonism with pyramidal signs due to ATP13A2, PLA2G6, FBXO7 and spatacsin mutations. Mov Disord. 2010 Sep 15;25(12):1791-800. http://pmid.us/20669327.

Ice Cream

Posted by on February 20, 2011 58 comments

I thought I’d show how we make ice cream these days. It’s an easy dessert to make, and great for kids. They may even help in the cleanup by licking the utensils!

We’ve adopted rice syrup as a sweetener lately. The nice thing about “safe starch” syrup is that the dessert can be made as sweet as one likes, without the health concerns of fructose. With sucrose, I felt obliged to minimize the sweetness.

We’ve also begun to use lemon juice in a lot of our cooking, since the citrate offers a number of health benefits. We’ve come to like the citrus flavor and fragrance in our ice cream too.

With these innovations, our basic formula for ice cream is:

  • 2 cups (1 pint) heavy cream. Ideally, the cream should be free of carrageenan, skim milk, or other additives, as discussed in this thread.
  • 6 egg yolks
  • 2 tablespoons rice syrup (more can be drizzled on when it’s done to accommodate those with a sweet tooth)
  • 1 lemon (juice and some meat)
  • berries, nuts, and other flavorings to taste

Today we made blueberry ice cream.

Some ingredients:

In the blender, before and after:

The ice cream maker:

This has a neat design: the pot that holds the ice cream is frozen beforehand (which requires 48 hours), and it mounts on a motor and turns. The rest of the ice cream maker is stationary; a stationary paddle churns the mixture as the pot turns.

Here we are pouring in the mixture:

And 15 minutes later it’s done:

And served:

Shou-Ching is the one with the sweet tooth!

UPDATE: Calorie Counts

For those concerned with such things, here’s the calorie breakdown of the ice cream:

Ingredient Carbs Fat Protein
Rice syrup, 2 tbsp 150
Blueberries, 2 cups 170
Egg yolks, 6 246 12
Cream, 1 pint 24 780 16
TOTAL: 344 (25%) 1026 (73%) 28 (2%)

Fructose from the berries represents about a quarter of the carb calories or 7% of total calories.