Print out and read the full text with your parents, "Meat Intake and Mortality
A Prospective Study of Over Half a Million People"
Look closely at:
Couple of things to take notice of:
- In table 1, BMI and odds of being a current smoker (or having quit less than a year ago) increase along with red meat intake.
- Vigorous physical activity and education both decrease as red meat intake increases (Table 1)
- It is a 10 year follow up on people ages 50-71, it has no data on what they ate at age 17
- It is a retrospective cohort, and only can discern correlation, not causation.
The other big point is, the red meat these people are eating is not the red meat you are eating (pasture raised, grassfed, no antibiotics/hormones etc).
Print out this recent review from the Journal of Animal Science, "Effects of conventional and grass-feeding systems on the nutrient composition of beef"
Look at table 5, the grass feed beef had statistically significant higher levels of SFA, omega-3 and CLA.
Show them some of the research of William Lands & Joseph Hibbeln. This power point from a recent NIH seminar is an excellent summary of some of their findings.
Show them Dr. Cordains published research, and explain how cherry picking bad reporting from the BBC on health science is not an effective way to establish healthy eating guidelines.