“Why didn’t they teach any of this in med school?” So began the question and answer session following my presentation at the annual meeting of the American Association of Cardiovascular and Pulmonary Rehabilitation (AACVPR). My topic: “Information Overload! Helping Patients Distinguish Evidence-Based vs. Anecdotal Nutrition Strategies.”
If you sometimes have a sense of information overload about what the research is saying when it comes to cancer prevention, heart disease and other areas of your health, you’re not alone.
Headlines regularly contradict each other about “must-include super foods”, rules about what to avoid, and suggestions that long-held nutrition mantras don’t make any difference after all. As it turns out, the health professionals at AACVPR made it clear that it’s not only their patients who are feeling information overload; they are, too.
In my presentation, we looked at common areas of confusion, going beyond the headlines to put studies within context of overall research.
• Some observational population studies don’t show a difference in heart disease risk with higher saturated fat. That highlights the importance of looking at overall eating Continue reading
Quick: what do tea, chocolate and coffee all have in common? There’s actually a lot they share – including many cancer-protective compounds – but for all who answered caffeine, that’s the big one.
Now a research team has sequenced a draft of the genome of the coffee plant, finding that the caffeine compound has probably evolved independently of tea or chocolate. The researchers sequenced the plant Coffea canephora, which reportedly accounts for almost a third of the world’s coffee production.
The study was published on Friday in Science.
In all, the scientists identified about 25,000 protein-producing genes in the plant. (Humans have approximately 21,000 genes.) When they compared the coffee genome to the DNA of tea and chocolate they found coffee’s caffeine enzymes are more closely related to other genes within the coffee plant than to caffeine enzymes in tea and chocolate.
Compared to the grape and tomato, the coffee plant contains larger families of genes that relate to the production of flavonoid and other compounds, which contribute to the smell of coffee and are studied for their health benefits. Continue reading
Eating high amounts of red meat increase risk of colorectal cancer while fiber-filled food reduces the risk, AICR research shows. Now comes a study that offers one possible explanation for both links, finding that diets high in red meat and a type of non-digestable fiber have opposite effects on a group of genetic molecules.
The study was published in Cancer Prevention Research.
Study researchers focused on a type of fiber called resistant starch. Our bodies don’t digest resistant starch in the small intestine. Then in the gut, bacteria convert resistant starch into the compound butyrate. In lab studies, this compound protects against colon cancer.
For the study, 23 participants, ages 50 to 75, switched between two types of diets. In one diet each person was given 300 grams — about 10 ounces — of raw lean red meat a day. That’s about the equivalent of a cooked 8 ounce burger. The other diet had the same red-meat content plus a butyrate resistant starch formulation. Each person was on one diet for four weeks then after a four-week washout period, switched to the second diet for four weeks. Continue reading