Do phytates fight cancer?

Jennie writes:

“I read a book on plant-based diets that which cliams that the phytates in whole grains kill cancer cells. Do whole grains really fight cancer?”

Ironic, isn’t it? In some corners of the nutrition world, the phytates in grains and legumes are reviled as “anti-nutrients.” In other circles, they are heralded as cancer killers.

In fact, both are true. Phytic acid in nuts, whole grains and legumes can bind to minerals like calcium and magnesium and reduce absorption of these minerals.  This effect can be greatly diminished by soaking, sprouting, or cooking these foods. But if you’re not soaking or sprouting your grains, don’t worry.  It’s unlikely to lead to mineral deficiencies.

In fact, the health benefits of phytic acid from whole grains and legumes appear to be much more significant than any downside.  In addition to building strong bones, lowering cholesterol, and removing heavy metals from your body, phytates may help prevent cancer (colon cancer in particular).

It’s worth pointing out that there are a lot of things that kill cancer cells.  But killing cancer cells in a petri dish and impeding the progression of cancer in a living organism are two entirely different things. Phytates are not effective chemotherapy. But they have been found to reduce the effects of actual chemotherapy in cancer patients.

 

Putting scary stats into perspective

Monday’s announcement from the World Health Organization, declaring red meat to be a “probable carcinogen” has dominated the nutrition news cycle this week. I’m already tired of talking about it so I won’t belabor it here. For those who are just catching up, my response to Monday’s announcement appears on the Huffington Post. You can also hear my interview on Maryland’s NPR station and join the discussion on the Nutrition Diva Facebook page.

Instead, let’s talk about risk and how our perception of it is influenced by the way it’s presented, both verbally and visually. Continue reading “Putting scary stats into perspective” >

Why cancer patients should leave antioxidant supplements on the shelf

supplementsAntioxidants are good, right? So more antioxidants must be better! This is the logic that has sold billions of dollars worth of dietary supplements and superfood extracts.  And when it comes to exaggerated health claims for dietary supplements, perhaps no one is as vulnerable as cancer patients.

They’re vulnerable for two reasons.

First, they’ll do (and spend) anything that they think will increase their chances against this terrifying disease. So they are easy prey for unscrupulous or well-meaning but misinformed marketers, hawking high-dose and largely unregulated dietary supplements that are supposed to “boost the immune system.”

Secondly, their bodies are in the grips of a disease (and, usually, a treatment regimen) that can profoundly alter their biochemistry and metabolic responses–in ways that can be hard to predict.  Continue reading “Why cancer patients should leave antioxidant supplements on the shelf” >

Myths About Microwaves

Talk about your Nutrition Zombies!  There’s an apparently unkillable myth that microwaving destroys nutrients or “denatures” food in some particularly harmful way. Every time I think we’ve driven a stake through its heart, it pops up again. (Wait, stakes are for vampires, not zombies. Maybe that’s the problem.)

Just this morning, I received an email from Julie, who wrote:

“A holistic clinician said it is best to avoid microwaves because they  change the molecular structure of food and renders in unabsorbable in the body.”

 

zombie

Let’s take these one at a time: Continue reading “Myths About Microwaves” >

This week: superfoods, stevia, eco-friendly mineral water, DHA, and plastics in food

Ever notice how superfoods seem to come and go?  I suspect that might be a clue that their superpowers are somewhat overrated!  In any case, amaranth seems to be the super-food of the moment.  (Quinoa is so 2011!) In this week’s newsletter, I had some advice on where this latest obession fits into a healthy diet.  Also, some thoughts on stevia and whether it might be too refined to be considered truly wholesome and how to lower the carbon-footprint of your sparkling water habit.

In the Nutrition Diva podcast,  I take a sobering look at how much plastic seems to be finding its way from our food into our bodies (and what to do about it).  Also,  a review of the latest evidence on  DHA, ADHD, and Alzheimers.

And finally, if you happen to be flying United Airlines over the holidays, you’ll be able to tune in to the Nutrition Diva podcast (along with several other Quick and Dirty Tips shows) at 30,000 feet!

Red Meat and Colon Cancer: Beyond the Headlines

I’m sure you saw the headlines this week about a new report from the American Institute for Cancer Research and the World Cancer Research Fund.  The report covered a variety of factors that appear to increase risk of colorectal cancer, including alcohol, processed meat, and excess belly fat, as well as things that appear to decrease the risk, including exercise, garlic, milk (but not cheese), calcium, and foods containing fiber.  However, most of the headlines I saw were along the lines of “It’s Official: Red Meat Causes Cancer.”

As long-time followers know, I’ve long been suspicious of the science on “red”  vs. “white” meat.   See, for example: Red Meat: Not so Bad After All?

Having now read the latest report in its entirety,  I want to highlight a few nuances that may help you decide how–or whether–to change your eating habits based on this latest indictment of red meat. Continue reading “Red Meat and Colon Cancer: Beyond the Headlines” >