Author Archive

New Study: Vegan Heart Disease Risk

Friday, February 11th, 2011

You may have seen the recent headlines that vegans may have an increased risk of heart disease:

Vegan diet may present heart disease risk

It starts off saying, “Strict vegetarians, known as vegans, may be at an increased risk of developing conditions that can lead to heart attacks and strokes, according to a new study.”

The “study” referred to is this paper:

Li D. Chemistry behind Vegetarianism. J Agric Food Chem. 2011 Feb 9;59(3):777-84.

It is not actually a study, but a review paper citing studies that are already well known. There’s basically nothing new here other than to say that vegetarians need to make sure they get enough B12 and omega-3.

The paper ends by saying, “All of the above issues may be associated with an increased thrombotic and atherosclerotic risk in vegetarians, especially vegans. However, meat eaters have a cluster of thrombotic and atherosclerotic risk factors higher [emphasis added] than those of both ovo-lacto-vegetarians and vegans.”

Ginny Messina has written a more in-depth article about the paper:

A healthy vegan diet reduces heart disease risk

Vegan for Life

Wednesday, February 9th, 2011

I’m happy to announce that the book Ginny Messina and I are writing together, Vegan for Life, should be available on July 12, 2011!

You can pre-order copies while giving a % of your purchase to this site by clicking on this link (or the one in the sidebar):

Vegan for Life: Everything You Need to Know to Be Healthy and Fit on a Plant-Based Diet

I apologize for not having posted in almost a month. I have been busy finishing the book as well as working on a soy article which is actually about 10 articles in one. After that is finished, I plan to get back to posting regularly.

Fermented Foods and Vitamin B12

Monday, January 10th, 2011

Someone sent me this question below and I thought I’d clear it up for anyone else who is wondering:

You did not mention kimchee or sauerkraut in your list of erroneous sources of B12. I wonder if you have any information about these products.

To my knowledge, there is no fermented food that requires a B12-producing bacteria for its fermentation. Wherever there are large amounts of bacteria, the chances increase that some B12-producing bacteria could be in the mix. Although the chances might increase, it is still unlikely, especially where fecal contamination is not involved, that a food is going to have biologically significant amounts of vitamin B12. But I have not seen any studies on kimchee or sauerkraut.

Taurine and Vitamin D

Monday, January 3rd, 2011

Happy New Year!

I have a couple of quick things which might be of interest:

1. After reading that QuasiVegan was taking taurine and feeling great, I decided to do some experimenting on myself. I have been taking 1,000 mg of taurine per day for a week. I don’t feel any different – not that I was feeling bad to begin with, but you never know.

A few years ago I tried a similar experiment with carnitine and I noticed myself feeling slightly worse. Also a few years ago, I tried taking methylcobalamin (a form of vitamin B12) rather than cyanocobalamin and felt nothing after going through an entire bottle over the course of a few weeks.

2. Over the holidays I talked to another vegan who was feeling very fatigued, got her D levels tested and they were low, started taking vitamin D, and now feels much better.

I’m not suggesting that how one feels is the best way to determine if taking a supplement is healthy or not, but it might be able to indicate if you had a severe deficiency.

Creatine Improves Cognition to Beyond that of Omnivores

Friday, December 17th, 2010

I just added to the creatine section of VeganHealth.org and am reproducing the addition below.

Remember that you can help support JackNorrisRD.com by purchasing holiday presents or making a direct donation from the links on the home page. Thank you!

A 2010 study of 121 young women (71 of whom were vegetarian or vegan) had the subjects supplement with either 20 g of creatine per day (four doses of 5 g throughout the day) or placebo for five days. At baseline, the vegetarians had similar memory to the meat-eaters, but after supplementation, the vegetarians who supplemented with creatine had better memory than the meat-eaters in either group. This study found that vegetarians were more sensitive to supplementation with creatine than meat-eaters. There were only minor side effects reported by some of the subjects.

If you plan to supplement with creatine based on this study, realize that it is not recommended to take 20 g of creatine past an initial loading phase, which is typically one week or less. After that, 5 g per day or less is recommended.

Source:

Benton D, Donohoe R. The influence of creatine supplementation on the cognitive functioning of vegetarians and omnivores. Br J Nutr. 2010 Dec 1:1-6. Epub ahead of print. PMID: 21118604. (Link)

Response to Paleosister

Thursday, December 16th, 2010

I received a ping back from an ex-vegan and ex-animal rights activist, Paleosister. She writes:

> “Jack Norris, who I remember seeing speak at AR 2003 and greatly admired, writes that we should try to consume as little animal flesh (and other animal products) as possible. Quite frankly, you’re missing the point, Jack. The world is being destroyed due to agriculture; entire ecosystems are ruined—the habitats’ of animal populations destroyed—because of the foods vegans and the left are promoting.”

Some background: Paleosister is another person who failed to thrive on a vegan diet. She writes about that:

> Another common response is simply disbelief that it’s really possible to experience a physiological change with just a bite of meat….the first time I sat down to eat meat, I thought, “that is the strangest thing. I actually do feel better!” Then, for the first time in nearly a decade, I didn’t have suicidal thoughts for an entire hour!

First of all, I want to say that I feel bad that Paleosister had poor health and suicidal thoughts as a vegan. It is a serious problem that some people don’t thrive on the vegan diet, and we should not blame the victim.

I suspect that part of the problem is that vegan propaganda often includes the message that “diets based on whole grains, legumes, nuts, fruits and vegetables provide all the necessary nutrients.” For one thing, they don’t – they don’t contain vitamin B12. But the mantra also simplifies the situation regarding a lot of other nutrients.

For too many years, groups promoted such an idea. Instead of making sure that vegans were getting enough protein, we talked about how it was impossible not to get enough protein. Instead of telling vegans to get enough calcium, we told vegans that calcium isn’t important. Instead of telling people to get a regular source of vitamin B12, we downplayed the need. Instead of telling vegans to get a normal amount of fat, we have promoted very low-fat diets.

In fairness, much of the vegan community has changed its tune since the 1990s and now many urge vegans to make sure they get enough of these nutrients. Also in fairness, some research has indicated that low-fat vegan diets can help effectively treat heart disease and diabetes. And since studies have shown vegetarians (vegans and lacto-ovo) to have good health over time, and many of us feel just fine, we didn’t think there was a problem.

Paleosister apparently did not find any help for her health problems when she looked. I do not know what she tried, nutrition-wise, and what she didn’t. She says:

➢ It’s not the placebo effect. It’s most likely not even the effect of any nutrient we know of.

It is highly unlikely that there are any essential nutrients required by a large portion of the human population that are not currently known – the success of soy infant formulas and tube-feedings indicate this. However, there are a variety of non-essential nutrients that some people might not make enough of when following a vegan diet, especially if their bodies have been dependent on those substances from animal products up until the point of going vegan.

The fact that many children whose mother’s were vegan from conception and who are vegan from birth (except breast-milk), grow and thrive, is proof that meat, dairy, and eggs are not needed to produce healthy human bodies (at least in many cases).

I am becoming more and more concerned about promoting “healthy eating” along with veganism. So often, when someone goes vegan, they make other changes that they think are for the better – no more junk food or very low fat. It seems safer, from the perspective of animal protection, that new vegans eat as closely as they were to the way they previously had eaten so that they feel similarly; that is, unless they were previously feeling badly due to poor diet.

We should also not view ex-vegans who failed to thrive as our enemies. Who can blame someone for eating meat if they felt terrible as a vegan? I understand that we believe animals have a right not to be killed, but there would be a very strong incentive to reshape such views if we felt miserable if we didn’t eat animal flesh. It would be nice to be able to work with such people who still care about animals but cannot be vegan, rather than vilifying them; or their vilifying us for that matter.

Our message needs to become more nuanced if we want to minimize the problems we see with failure to thrive.

Now back to the point that Paleosister says I don’t get:

> The world is being destroyed due to agriculture; entire ecosystems are ruined—the habitats’ of animal populations destroyed—because of the foods vegans and the left are promoting.

No matter what humans eat, there is going to be environmental harm. I do understand that monocrops are generally bad for the environment, but I do not agree that vegan foods, in general, are significantly worse than grass-fed animal foods.

In the U.S., most animal foods are made using monocrop feeds. It does not seem realistic to feed 300 million people (or six-billion), grass-fed animal products as the bulk of their calories.

If most people switched to a vegan diet, an enormous amount of land currently grown for feed crops could be turned back into natural ecosystems, and that would be a huge gain. And at the same time it promotes an ethic of respecting the lives of animals.

VeganHealth.org Update: Zinc

Wednesday, December 15th, 2010

Just added two tables to the VeganHealth.org page on zinc. Table 1 lists the DRIs and Table 2 lists plant foods high in zinc. Link.

VeganHealth: New Page on Digestion

Tuesday, December 14th, 2010

I have just added a page on digestion to VeganHealth.org. Now before anyone get’s too excited, there isn’t anything there except a link to the vegan version of Beano, Bean-zyme, and a link to an article by Dina Aronson, RD with some good tips on preventing flatulence.

But now you know it’s there, and with a permanent link available from the home page of VeganHealth.org.

Ginny Messina: New Vitamin D and Calcium RDAs

Tuesday, December 14th, 2010

Ginny Messina: New Vitamin D and Calcium RDAs: What They Mean for Vegans

Summary of Recommendations for Vegan Teens

Saturday, December 4th, 2010

I just added a page on VeganHeatlh.org for vegan teens. It’s nothing new, just puts all the information in as concise as possible terms.