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MASI Longevity Science
Learn
Reference guides on the biology of aging and the nutrients we study and sell — written for careful readers who want mechanisms, evidence limits, and practical context without hype.
Reference guides
NMN
Nicotinamide mononucleotide and the NAD+ pathway: what is established, what remains under study, and how people use NMN in multi-month programs.
Spermidine
Polyamine biology, autophagy-related research, timelines for evaluation, and program placement.
Resveratrol
A polyphenol with a large research literature — how to read that literature and use the nutrient carefully.
Fisetin
Flavonoid chemistry, senescent-cell research, human trial designs, and dosing literacy (food vs daily vs investigational pulse schedules).
Hair Complex
Hair appearance across aging and metabolic stress, and the rationale for a two-part supplement system.
Stacks and programs
How to combine core nutrients with clear roles and multi-month evaluation windows.
Quality and testing
How pharmacopoeial languages (USP, EP, JP) relate to ingredient quality conversations.
Safety and interactions
When supplement–medicine combinations need clinician or pharmacist review.
Products
- Premium NMNNAD+-pathway nutrient · high purity positioning
- Premium SpermidinePolyamine · cellular renewal research context
- Premium ResveratrolPolyphenol layer
- Premium FisetinSenescent-cell research context · high purity
- Premium Hair ComplexTwo-part system for hair appearance support
Further reading
- MASI Science
- USP, EP, and JP — plain explanation
- Polyphenols and prescription medicines
- NMN timing
- Education for people on clinician-directed metabolic care
This material is for education. It is not medical advice and is not a substitute for care from a qualified clinician. MASI products are dietary supplements. They are not intended to diagnose, treat, cure, or prevent any disease. If you are pregnant, nursing, take prescription medicines, or have a medical condition, discuss supplement use with your clinician before starting.