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Knowledge Base
Guides on supplements, nutrition and the research behind them, written in plain language.
Showing 11 results: genetic-testing All Articles
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Retinol vs Beta-Carotene: The Vitamin A Safety Debate You Need to Know
Dr. Amanda Foster, MD, breaks down the retinol vs beta-carotene debate with research, dosing specifics, and who should avoid which form. Get the facts...
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Methylated B Vitamins: Why Your Genetics Matter More Than Your Multivitamin
Most people waste money on wrong B vitamins. Learn how MTHFR and COMT genes affect methylation and which methylated forms (like methylcobalamin) actua...
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Genetic Testing for B Vitamins: Are You Wasting Your Money?
Most people with MTHFR mutations don't need methylated B vitamins. Learn when genetic testing matters, what research shows, and how to supplement smar...
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DNA Testing for Weight Loss Supplements: What Actually Works
RDN Marissa Thompson breaks down which DNA-based supplement recommendations have real evidence—and which are just expensive guesswork.
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DNA Diet Testing: What Your Genes Really Reveal About Weight Loss
A clinical dietitian explains which genetic tests actually help with weight management—and which ones waste your money. Based on real patient cases an...
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DNA & Microbiome Testing: What Actually Works for Personalized Nutrition
A clinical dietitian breaks down DNA and microbiome testing for personalized nutrition—what the research shows, who it helps, and when to save your mo...
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Your DNA Doesn't Need a Vitamin Subscription: The Truth About Personalized Packs
Most AI-driven vitamin subscriptions are marketing gimmicks—here's what genetic testing actually reveals about your nutrient needs, based on clinical...
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MTHFR & Methylation: What I Actually Recommend for B Vitamins
A physician's practical guide to B vitamin forms for methylation support—cutting through genetic hype with evidence-based recommendations.
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Why Your Vitamin D Dose Might Be Wrong: The Genetics of VDR Polymorphisms
I used to prescribe the same vitamin D dose to everyone—until genetics showed me why some need 2,000 IU while others need 10,000. Here's what the VDR...
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Your DNA's Supplement Blueprint: A Doctor's Practical Guide to Nutrigenomics
Genetic testing reveals why supplements work for some but not others. Learn which genes matter for vitamin D, B12, folate, caffeine & more. Practical...
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Folate vs Folic Acid: Why Your Genes Might Hate Your Prenatal Vitamin
Nearly 40% of people can't convert folic acid properly. Learn why methylfolate matters for pregnancy, mood, and your genes—plus which supplements actu...
