Why NAD+
NAD+ is one of the most-studied molecules in modern longevity research. Supplementing precursors is one of several lifestyle strategies — alongside exercise, fasting windows, sleep and protein intake — that may help support healthy aging.
Longevity
Nad//Core — cellular energy, supported daily.
NAD+ is a coenzyme found in every cell — central to energy metabolism, DNA repair pathways and the activity of longevity-associated enzymes. Levels naturally decline with age. Nad//Core uses research-backed precursors to support those pathways daily.
What to expect
Effects of NAD+ precursor supplementation tend to be cumulative rather than acute. Consistency matters more than dose timing.
Frequently asked questions
Is Nad//Core third-party tested?
Yes. Every batch of Nad//Core is independently tested for identity, purity, heavy metals and microbial limits. Certificates of analysis are available on request — see /certificates-of-analysis.
Are the ingredients clinically dosed?
Active ingredients are formulated at quantities studied in peer-reviewed human research where possible. We publish every active and its quantity on the label — no proprietary blends.
Can I take this with medication or a medical condition?
Always consult a qualified healthcare professional before starting any supplement, especially if you are pregnant, breastfeeding, taking medication or managing a medical condition. NEXRY products are not intended to diagnose, treat, cure or prevent any disease.
When will I notice a difference?
Responses vary by individual. Most members describe noticing supportive changes within 2–6 weeks of consistent daily use alongside healthy sleep, nutrition and movement.
Do you ship internationally?
Yes — NEXRY ships across the USA, Ireland and Spain. See /shipping-and-returns for delivery times, duties and returns by region.
References & further reading
- Examine.com — supplement evidence database (https://examine.com)
- Office of Dietary Supplements, NIH — ingredient fact sheets (https://ods.od.nih.gov)
- European Food Safety Authority — health claims register (https://www.efsa.europa.eu)