Feb 12, 2026Biomarker Testing Before Supplementing: B12, Vitamin D, Homocysteine, Ferritin, and CRPSupplementing without baseline testing is guesswork. Vitamin D, B12, folate, ferritin, homocysteine, and hs-CRP are the most actionable starting points. This guide explains what each test reveals, what ranges mean, and which supplements to prioritize based on results.
Feb 10, 2026Drug-Supplement Interactions: Warfarin, Statins, Metformin, and SSRIs — Common ConcernsMany commonly used supplements interact with medications — some significantly. Vitamin K interacts with warfarin. CoQ10 may modulate statin effects. Fish oil affects bleeding risk. NAC interacts with nitroglycerin. This guide maps the most clinically relevant interactions for the common longevity supplement stack.
Feb 8, 2026Supplement Quality and Third-Party Testing: USP, NSF, Informed Sport — How to Evaluate BrandsThe supplement industry is largely unregulated in the US. Third-party certification programs (USP, NSF International, Informed Sport) verify label accuracy and contamination testing. This guide explains what each certification covers and its limitations.