Longevity Box Review: Independent Analysis of a Leading NMN & NAD+ Stack

Overview

Longevity Box is a UK-based longevity supplement brand focused on NMN, NR, resveratrol, and other geroscience-aligned ingredients. Their flagship NMN product is marketed at ≥99% purity with publicly available certificates of analysis, a level of disclosure that puts them in a small minority of consumer brands.

Science Review

NMN (nicotinamide mononucleotide) is a direct NAD+ precursor. Clinical trials in adults have demonstrated dose-dependent increases in blood NAD+ levels and modest improvements in markers of metabolic and muscular function. The most informative data comes from the 2021 Yoshino et al. trial in Science, which used a 250 mg daily dose over 10 weeks.

Ingredients Analysis

The flagship product contains pharmaceutical-grade NMN. The label discloses dose, form, and purity. There are no proprietary blends. Every milligram of active ingredient is fully disclosed.

• Active: 500 mg NMN per serving
• Purity: ≥99% (verified by COA)
• Excipients: Plant-based capsule, microcrystalline cellulose
• Manufacturing: GMP-certified facility

Who It Is For

Adults pursuing evidence-aligned NAD+ optimization who value transparent sourcing and third-party verification over the cheapest available option.

Who Should Avoid It

Anyone pregnant, breastfeeding, on chemotherapy, or with active cancer should consult a physician first. NMN's effect on existing tumors remains an open question.

Final Verdict

Longevity Box ranks among the most transparent NMN producers we have reviewed. It earns a strong overall score on the strength of testing, purity, and disclosure. Those three factors matter more in this category than marketing ever will.