Understanding Micronutrient Targets: What Do They Mean, and Where Do They Come From? (Episode 120)

Time Stamps, Sources, and Links

Intro (0:00)

Recommendations and good vibes (0:20)

Housekeeping notes (8:45)

Recommended products and more from the SBS team (11:50)

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Episode 1 in the Micronutrient Series

History of RDAs and Government Micronutrient Recommendations (14:53)

The 100-Year History of Vitamins – Supplement Facts – Better Nutrition
Vitamins Come to Dinner | Science History Institute
Are We Well Fed?: A Report on the Diets of Families in the United States (Miscellaneous Publication No. 430)
The History and Future of Dietary Guidance in America – PMC
Dietary Guidelines for Americans, 2020-2025
Dietary Reference Intakes Development | health.gov
History of Nutrition: The Long Road Leading to the Dietary Reference Intakes for the United States and Canada

DRI development retrospective

Ongoing DRV-related publications from the EFSA

Micronutrient series on the website

Micronutrient content in the MacroFactor knowledge base

Understanding Micronutrient Targets and the DRI Framework (37:13)

How EARs, RDAs, and LTIs are Determined (59:52)

General discussion of the implications of imprecise research and large inter-individual variability (1:21:21)

Note: I was right about magnesium, and wrong about calcium. Calcium carbonate is the more common version in supplements (not oxide). Chelated calcium is generally a bit better than calcium carbonate, but the difference between calcium carbonate and chelated calcium isn’t NEARLY as large as the difference between magnesium oxide and chelated magnesium.

The relative imprecision of micronutrient tracking (and WHY micronutrient content can differ so much within a single food) (1:49:30)

Why labeling error generally doesn’t matter much for calorie (and macronutrient) tracking: SBS article – Nutrition Labels Are Inaccurate (and the Math Behind Why It Doesn’t Matter)
Variable vitamin C content in spinach
Slightly higher nutrient levels in similar foods in Germany than the Netherlands
Soil health and nutrient density
Many roles of vitamin C in plants
MacroFactor knowledge base content on selenium
Selenium uptake in plants
Regional selenium differences in the US
Regional selenium differences in China
Selenium intake and diabetes
Selenium and cancer
General selenium content
Omega-3 content in farmed vs fresh salmon
Generally high vitamin A levels in the livers of numerous arctic predators

Why it can be challenging to track your micronutrient intake in the first place (2:22:27)

Nutrient reporting frequencies in the UK graphic: (from this study, discussed in this article)

Wrap-up and conclusions (2:28:39)

Considerably higher rates of vitamin D deficiencies with darker skin at higher latitudes

Depressing final thought (2:35:49)

Cool, less depressing final thought (2:42:16)

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