Question: How useful is hair trace mineral analysis (HTMA) for nutritional testing? Short Answer: Hair trace mineral analysis is included as an optional add-on in the comprehensive nutritional screening from Testing Nutritional Status: The Ultimate Cheat Sheet, because it can capture data for some ultra-trace minerals for which there are no better-validated tests, and it might capture a pattern that might not be picked up as quickly with blood work, such as a mineral transport issue. However, its utility is limited by the fact that hair mineral content is not well validated as a test for any specific mineral, is generally anti-validated when there is enough science on a mineral (such as zinc, where hair zinc does not go down in deficiency), and should not be used as a central piece of data without corroboration from other more well-validated tests, which exist for most of the nutrients. This is a clip from a live Q&A session open to CMJ Masterpass members. In addition to this episode, you can access two other free samples using this link: https://chrismasterjohnphd.substack.com/p/questions-on-hair-trace-mineral-analysis In that batch of free episodes you will also find the answer to this question: What's the Deal With Seed Oils? Is Whole Food Vitamin C Really Different? If you want to become a Masterpass member so you can participate in the next live Q&A, or so you can have access to the complete recording and transcript of each Q&A session, you can save 10% off the subscription price for as long as you remain a member by using this link to sign up: https://chrismasterjohnphd.substack.com/qanda Learn more about the Masterpass here: https://chrismasterjohnphd.substack.com/about This snippet is from the June 16, 2023 AMA. The full recording and transcript is reserved for Masterpass members. Here is a preview of what’s included: Butyrate for Hashimoto’s? What else? What in the comprehensive nutritional screening is helping to interpret lactate/pyruvate and ketone ratios? Is the solution to a respiratory chain disorder to take Niagen? If I have high manganese on an HTMA, do I need to detox? Should CFS patients target reducing their serum BH4? What to do about low alkaline phosphatase? If my glucose spikes above 140, should I eat fiber and take ACV before the meal, eat cinnamon with the meal, chew slowly, and move for ten minutes after my meals? Difficulty getting Quest to do the lactate/pyruvate ratio correctly. Is 38 milligrams of niacinamide enough to rule out niacin deficiency as a cause of low NAD+? How does optimizing body composition help optimize energy metabolism? Can impaired energy metabolism make someone fatter? Is monounsaturated fat the best fat? Manganese followup. Do you need to stop taking biotin before a biotin test? What in "a bunch of supplements" flip the lactate/pyruvate ratio from high to low? NAD infusions, yay or nay? Why do I feel better after a warm shower, even better than after sunshine? Should I cut back on vitamin A if I have toxicity symptoms but cutting back makes me get sick? Do home blood drop tests have to be pricked at the finger? Is it true that my boyfriend was just born a night owl? How much eating out is too much? When measuring ketones, lactate, and glucose at home to optimize energy metabolism, what time of day should we take the measurements? Here’s a link to the full AMA: https://chrismasterjohnphd.substack.com/p/recording-and-transcript-of-the-june-a55