Shedding Some Light On Dairy

The following is a guest post by Dr Lilli Link on the topic of dairy consumption.  There is so much controversy on this subject that I asked her if she would share her knowledge on the subject.

The second most frequent question I hear when I tell someone I eat a primarily raw vegan diet or suggest one of my patients try it is, “Don’t you need milk for your bones?” If you don’t want to read all the way through the blog to get the answer, I’ll give it away right now: No!

Why would someone choose to stay away from dairy when ice cream and cheese taste so good and it’s supposed to be healthy? Even the government says we should be eating it. One reason to avoid dairy is based purely on logic, not science. It makes no evolutionary sense. No other mammal drinks milk after infancy, and certainly not the milk of a different species. In addition, although most people of European descent have adapted over the years so that they don’t lose the enzyme (lactase) necessary to digest dairy, more than half of the world’s population is lactose intolerant and can’t digest it.

But if those reasons aren’t convincing enough, here is a list of problems that have been shown in scientific studies to be associated with eating dairy: constipation, acne, asthma, and eczema. With regard to cancer, the evidence indicates dairy may be linked to a decreased risk of some cancers and increased risk of others. But it definitely increases a hormone called IGF-1 (insulin-like growth factor-1) which is a tumor promoter – something we cancer survivors would just as soon avoid. Finally, it is full of antibiotics, dioxin and hormones. Even if you are drinking organic milk from a cow that was never injected with bovine growth hormone, the milk is still full of the hormones she produced naturally.

So there are a lot of reasons to stay away from dairy. But doesn’t it help make your bones stronger? How else can you get enough calcium in your diet? The US RDA for calcium is 1000-1300mg/day, depending on your age and gender. In fact, it is hard to consume that much calcium if you are not eating dairy. This may be where the confusion begins. In a study that compared calcium consumption in different countries, the countries with the lowest calcium intake, about 500-1000mg/day, had lower rates of hip fractures (the dreaded outcome of low bone density) than the countries with the highest calcium intake (over 1000mg/day). Another study showed that countries with the highest consumption of animal protein intake had the most hip fractures, whereas the countries with the highest vegetable protein intake had the fewest hip fractures.

Although a number of studies show that eating dairy is associated with a decreased risk for fractures, a similar number of studies show it makes no difference. One of the major obstacles to getting a true picture of the importance of dairy for bone strength is the way the studies are done. Study participants are asked what they usually eat and then followed to see how many end up with broken bones. Since milk is touted as a healthy food, the people who eat the best and exercise the most are also the ones likely to be eating the most dairy. Curiously, of the scientific review articles about dairy and osteoporosis, most of the ones that showed a favorable association between dairy and bone health were sponsored by the National Dairy Council.

Since people from other countries who eat much less calcium than we eat have fewer fractures, maybe it’s not all about how much calcium we eat. Actually, more important is how much we keep. There are two other nutrients, in particular, which affect how much calcium we hold onto: protein and sodium. The more protein and sodium we eat, the more calcium we urinate out. So if we eat less protein and sodium (which are all too commonly consumed in a Western diet), we probably don’t need to eat as much calcium.

The other side of the equation is the absorption of calcium. It is better absorbed in an acidic environment, such as with vitamin C. That means that the lemon juice on your green leafy vegetable is helping you absorb the vegetable’s calcium. And vitamin D also increases the amount of calcium absorbed by the body.
Finally, it is becoming increasingly clear that there are other nutrients that are also very important for bone formation, such as vitamin K (high in dark green vegetables) and magnesium (high in green vegetables and seeds).

If you are wondering if a raw vegan diet can be okay for your bones, there has actually been a small study which suggests that it is. In this study, the people following the raw vegan diet were much thinner and had lower bone density (which goes along with being thinner). The reassuring part of the study was that the blood markers of bone turnover (i.e., how much bone was formed and broken down) showed no difference between those who followed the raw vegan diet and those who followed a typical American diet that contained almost twice the amount of calcium as the raw vegan diet.

Perhaps you are starting to think you might like to take dairy out of your diet, and you want to be sure you are still getting enough calcium. Good sources are dark green vegetables, nuts and seeds. Especially good foods are collard greens, kale, almonds and sunflower seeds.

Now if you are interested, theoretically, in cutting dairy out from your diet, but need some added incentive, read on. (If you still want to enjoy your milk, however, I suggest you stop reading now!) As a result of the milking process, cows often have mastitis (an infection of the udder), making dairy full of white blood cells, aka, pus. This means your yogurt, cottage cheese, ice cream, etc., are also full of pus.

It’s been 10 years since I have had dairy of any kind, and at this point I no longer even miss the cheese that sits on top of my former favorite food: pizza. But if you think you need some milk or cheese substitutes there are plenty of vegan (e.g., soy or rice-based) and raw (e.g., nut or seed-based) options to satisfy your palate!

Lilli Link, MD, MS, is a board certified internist who has the knowledge and experience to combine conventional and complementary approaches to individualize and optimize your health.  Since her own diagnosis of cancer over ten years ago, she has learned first-hand how to use diet and lifestyle to optimize her own health and the health of her patients.  For more information about Lilli and her services, please visit: http://www.llinkmd.com/About_Dr.php

Elyn Jacobs

elyn@elynjacobs.com

http://www.elynjacobs.wordpress.com

**********************************************************

Elyn Jacobs is President of Elyn Jacobs Consulting, Inc. and a breast cancer survivor.  She helps women diagnosed with cancer to navigate the process of treatment and care, and she educates about how to prevent recurrence and new cancers.  She is passionate about helping others get past their cancer and into a cancer-free life.

The Dark Side of Peanuts and Dairy

Peanut butter is a staple in many children’s diets.  Peanuts (which, by the way are a legume, not a nut) are hign in protein, so why not eat them?  Peanuts, and expecially peanut butter are often contaminated by a fungus-produced toxin known as Aflatoxin (AF).  Aflatoxins often occur in crops in the field prior to harvest, but after harvest contamination can occur if crop drying is delayed and crops are stored in moist conditions.  Aflatoxins are found occasionally in milk, cheese, corn, peanuts, cottonseed, nuts, almonds, figs, spices as well as in feeds for animals (the reason AF is found in dairy and meat products).  However, the commodities with the highest risk of AF contamination are corn, peanuts and cottonseed.  Peanut butter is often contaminated with levels of AF as much as 300 times the amount judged to be acceptable in U.S. food, while whole peanuts were much less contaminated.  This disparity between peanut butter and whole peanuts originates at the peanut factory.  The best peanuts, which fill “cocktail” jars, are hand selected from a moving conveyor belt, leaving the worst, moldiest nuts to be delivered to the end of the belt to make peanut butter.  The visual here makes me never want to even look at peanut butter again.  So besides the unappealing idea of eating moldy peanuts, what’s the real issue?  AF’s have shown to cause liver cancer in rats, and are thought by many to be the most potent chemical carcinogen ever discovered.  So where’s the FDA?  The FDA allows AF’s at low levels in nuts, seeds and legumes because they are considered “unavoidable contaminants.”  The FDA believes occasionally eating small amounts of aflatoxin poses little risk over a lifetime, and that it is not practical to attempt to remove it from food products.   The problem here is the word “occasional.”  Occasional is a bit like the phrase “in moderation”; the problem being that it is easy to have too much of something you enjoy.

To help minimize your exposure to aflatoxin, the FDA recommends purchasing only major brands of nuts and nut butters and to discard any shelled nuts that look discolored or moldy. Some medical research has indicated that a diet including vegetables such as carrots, parsnips, celery and parsley may reduce the carcinogenic effects of aflatoxin, and a study by the Johns Hopkins University also suggests that foods high in chlorophyll can be helpful.  Green vegetables - asparagus, bell peppers, broccoli, Brussels sprouts, green cabbage, celery, collard greens, green beans, green peas, kale, leeks, green olives, parsley, romaine lettuce, sea vegetables, spinach, and turnip greens are concentrated sources of chlorophyll. 

Who is most susceptible to AF contamination and its cancer-producing effects?  Children are major consumers of peanut butter.  (I will add that I practically survived on peanut butter for much of my early adulthood, and certainly suspect that was part of my demise.) Children are also major consumers of dairy products, and a well-known study called The China Study produced compelling evidence that casein, the protein in cow’s milk, helps promote and nurture tumor development.  The study produced significant evidence that a high-animal protein diet combined with even a small amount of aflatoxin resulted in very high rates of liver cancer in adults as well as children.  They also found that in those people who consumed considerable AF’s and very little animal protein, cancer rates were very low.   They found that casein, and very likely all animal proteins, may be the one of the most cancer-causing substances that we consume.  Adjusting the amount of dietary casein we eat may have the power to turn on and off cancer growth. What does this mean?  It means that while we should still be concerned with AF’s, it makes sense to reduce our animal protein consumption. (Overall, animal protein is not the best protein source for most people. While a high animal-protein diet can promote cancer growth, plant protein does not, even at high levels of intake). To reduce your animal protein consumption, consider almond, rice or hemp milk instead of cow’s milk, and switch to a mostly- whole foods, plant-based diet.

 Need another reason to toss the peanuts?  Peanuts are an inflammatory food, which means consumption increases inflammation in the body.  Inflammation is known to provide a cancer promoting environment in the body.  Can’t imagine giving up peanut butter?  Try almond butter.  It may take some getting used to, but your body will thank you and may just find it delicious!

For more information, please visit:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC64728/

http://www.niehs.nih.gov/health/impacts/aflatoxin/index.cfm

http://www.thechinastudy.com/

Elyn Jacobs

elyn@elynjacobs.com

elynjacobs.wordpress.com

elynjacobs.blogspot.com

Elyn is President of Elyn Jacobs Consulting, Executive Director for the Emerald Heart Cancer

Foundation, a certified cancer coach, and a breast cancer survivor.  Elyn helps women diagnosed with cancer to navigate the process of treatment and care, and educates to prevent recurrence and new cancers.  She is passionate about helping others get past their cancer and into a cancer-free life. To learn more about Elyn’s coaching services, please visit:  http://elynjacobs.wordpress.com

This post was updated on January 11th, 2012