Just and FYI:
He goes into this about 2:30 into the video.
Seems to be referring to the studies in citation 11 and 12 in this follow-up:
http://circ.ahajournals.org/content/103/1/52.full.pdf?download=true
Abstract
Background—In experimental animals, iron overload appears to promote atherosclerosis and ischemic myocardial damage, but the results of epidemiological studies that relate iron stores to risk of coronary heart disease (CHD) have been inconsistent.
Methods and Results—We prospectively studied blood donations, which effectively reduce body iron stores, in relation to the risk of CHD among participants in the Health Professionals Follow-up Study. The lifetime history of blood donation was assessed with a questionnaire in 1992. The 38 244 men who were free of diagnosed cardiovascular disease at that time were included in the analyses. During 4 years of follow-up, we documented 328 nonfatal myocardial infarctions and 131 coronary deaths. Although the number of lifetime blood donations was strongly associated with lower plasma ferritin levels in a subsample, the blood donation was not associated with risk of myocardial infarction or fatal CHD. The age-adjusted relative risk (RR) of myocardial infarction for men in the highest category of blood donations (≥30) compared with never donors was 1.2 (95% CI 0.8 to 1.8), and this RR was not materially changed after adjustment for several coronary risk factors. No significant associations were found between blood donation and the risk of myocardial infarction in analyses restricted to men with hypercholesterolemia or those who never used antioxidant supplements or aspirin.
Conclusions—The study results do not support the hypothesis that reduced body iron stores lower CHD risk.
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If the mechanism of action here would be physiological - reduction of blood iron levels - this is controversial, I believe:
Nutrients | Free Full-Text | Iron: Protector or Risk Factor for Cardiovascular Disease? Still Controversial | HTML
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The studies mentioned in the video - can't say which ones he's referring to - also seem to be retrospective. I.e., those who donate blood seem to have a lower CVD risk vs. the act of donating blood lowers CVD risk.
-S