A 500 mg NR capsule can be part of a product whose full labeled serving contains 1,000 mg. Research can also use 500 mg on more than one occasion per day, making the daily intervention different from the capsule amount.
Those details matter when a bottle cites a study. Identify whether the number describes one unit, a full serving, or the complete research regimen before deciding that the product and paper match.
500 mg can be a capsule amount within a 1,000 mg serving or research regimen. Compare the full intervention, not just the number printed beside one capsule.
The Tru Niagen Pro label makes the distinction clear
Tru Niagen Pro lists a two-capsule serving providing 1,000 mg nicotinamide riboside chloride. Each capsule therefore contains 500 mg, but one capsule is not the full labeled serving described on that panel.
This explains the packaging; it is not advice to modify the product’s directions. The 1,000 mg NR guide addresses the larger serving and its evidence questions.
A split research regimen is still a daily total
The Martens trial studied 500 mg NR twice daily over six weeks in healthy middle-aged and older adults. It therefore investigated a 1,000 mg daily total, not simply one 500 mg capsule per day.
The study helps explain why a citation must include frequency as well as unit amount. It does not provide personal instructions, and changing the regimen means changing the intervention being compared.
A 500 mg combination introduces another variable
Some research has combined NR with pterostilbene, including a higher-amount arm containing 500 mg NR. Such a result cannot be attributed to NR alone without accounting for the other ingredient and study design.
The Tru Niagen versus Elysium guide explains the practical difference between a plain precursor product and a combination formula. Equal NR amounts do not make those formulas identical.
Do not infer a halfway clinical effect
A 500 mg label lies numerically between 300 mg and 1,000 mg, but the health outcomes do not have to lie on a straight line between them. Different studies, populations, durations, and measurements prevent a simple interpolation.
A blood-NAD increase also does not specify how much a symptom should improve. Ask what outcome was actually measured before treating a dose-response graph as an energy or longevity scale.
How to read a 500 mg offer without confusion
Write down the amount per capsule, capsules per serving, and servings per container. For a cited trial, record the complete daily intervention and whether other ingredients were included. Keep those two records separate until they truly match.
Use NR 300 mg for a different label example and NMN versus NR when the product comparison changes molecules. Neither comparison should be used to assemble a personal escalation schedule.
Sources & reading notes
Editorial source review updated September 19, 2026. Provider pages describe their own offers; inclusion does not verify a product or its results.
- Tru Niagen Pro: 1,000 mg product and label Manufacturer panel: 1,000 mg nicotinamide riboside chloride per two-capsule serving. Product description is not independent efficacy verification.
- Martens et al. (2018): randomized oral NR crossover trial Short-term human biomarker and tolerability study; not a lifespan trial.
- Dellinger et al. (2017): randomized NR plus pterostilbene trial Eight-week biomarker and safety study; lipid observations and baseline imbalance remain relevant.
- FDA: questions and answers on dietary supplements Regulatory categories and limits of premarket review.
Educational information, not individualized medical advice. We do not claim medical review or firsthand treatment experience. Read our review standards and commercial disclosure.