Which Micronutrients Are Worth Monitoring? (Episode 121)

In a standard Western diet, added sugar and saturated fat are frequently over-consumed, exceeding recommended guidelines. Sodium intake also tends to be higher than public health recommendations, though its health implications are more controversial.

The hosts argue that concerns about omega-6 fats causing inflammation are largely overblown, and total omega-3 intake is more critical than the omega-6 to omega-3 ratio. Industrially produced trans fats have been largely phased out in most developed countries since 2021, making them less of a concern for over-consumption today.

The nutrients most often under-consumed include fiber, EPA and DHA (Omega-3s), Vitamin A, B6, Folate, C, K, Choline, Magnesium, Potassium, and Zinc. Vitamin E is on the list according to targets, but its true essentiality for most healthy people is questioned.

The recommended adequate intake for Vitamin E is quite high, leading many to appear to under-consume it. However, the essentiality for this function has never been demonstrated in humans, and generally healthy individuals don't experience symptoms of deficiency even with low intake, leading to skepticism about how closely it needs to be monitored.

Vegans should particularly monitor their intake of EPA and DHA (often requiring algae oil supplements), Vitamin B12 (almost always requiring supplementation), calcium, iron, zinc, and selenium. Consuming a varied diet with plenty of mushrooms and soy products can help cover some of these needs.

Micronutrient reductionism is the trap of focusing solely on numerical micronutrient targets as the definition of a 'healthy diet.' This can lead to choices that meet targets but miss out on other beneficial bioactive compounds (like polyphenols, isothiocyanates) found in diverse whole foods, making the diet less healthy overall.

The research on multivitamins is not very promising. Meta-analyses generally find no significant effect on all-cause mortality, cardiovascular disease, or cancer, or only very small and inconsistent effects. Some argue they might promote dietary laziness or have unquantified risks.

Low Vitamin D in a healthy person could be due to insufficient dietary intake, limited sun exposure, or random variability. While low Vitamin D can sometimes causally contribute to disease, it's often an indicator or consequence of general poor health or disease states, rather than the primary cause.

There isn't a single, reliable proxy measurement for overall micronutrient intake that the hosts would confidently endorse. However, a general approach of consuming a diet rich in diverse, minimally processed whole foods, including plenty of fruits, vegetables, whole grains, nuts, seeds, and mushrooms, is likely to ensure sufficient intake.

Folic acid supplementation (typically 400-800 micrograms) is widely recommended for women who are pregnant or trying to conceive. Its main purpose is to prevent neural tube defects, such as spina bifida, and has proven very effective in doing so. It is not necessary for conception itself.

Epidemiological evidence shows a promising association between higher Vitamin K status and lower cardiovascular disease risk. The mechanism involves Vitamin K being a cofactor for MGP, which prevents arterial calcification. However, conclusive randomized controlled trials are still needed to confirm a causal effect, and research is currently underway.

While there is some optimism about boron supplementation for bone health, osteoarthritis, and potentially inflammatory biomarkers, and even a small effect on testosterone levels (with nuanced data), most research is from small, short-term studies. There's a lack of robust mechanistic understanding, and the hosts recommend prioritizing a diet rich in fruits and vegetables over supplementation due to unresolved questions and potential toxicity at higher doses.