NMN 500mg Dosage in 2026: What One Capsule Delivers

Last updated: October 1, 2026 · Published by Eternal Elixir

Edited by Elaine Fletcher, Researcher

Written by Ryan Roberts, researcher

An NMN 500mg dosage means one standard capsule a day, and it sits in the middle of the range that human trials have tested. Daily studies in healthy adults have used 250 mg to 1,250 mg of NMN, and in an 80-person dose comparison, blood NAD rose in every group that took 300 mg or more. Eternal Elixir makes the NMN 500mg capsules discussed on this page, so read our product notes with that in mind.

Short answer: 500 mg of NMN a day sits between the 300 mg and 600 mg daily doses that raised blood NAD in a 60-day trial of healthy middle-aged adults, and it was well tolerated as a single dose.

What an NMN 500mg dosage actually delivers

NMN, short for nicotinamide mononucleotide, is a compound the body uses to build NAD+, a coenzyme that cells rely on in energy metabolism. Research in animals and people suggests NAD+ levels fall in several tissues as we get older. That is the reason NMN became a popular healthy aging supplement. A 500 mg capsule is simply a fixed amount of that precursor, swallowed once a day.

What happens next can be measured in blood. In human trials, oral NMN raised circulating NAD+ within weeks, and after a single dose its breakdown products showed up in plasma within hours. Those readings show the body took the NMN up. No human study has shown that NMN extends lifespan, and nothing on this page claims it does.

For anyone buying from Eternal Elixir, the math is simple. One capsule of Eternal Elixir NMN 500mg provides 500 mg of beta-nicotinamide mononucleotide, with rice flour and a cellulose capsule as the only other ingredients. If you want wider context before you settle on a dose, our guide to the best NMN supplements explains how the main products compare.

Key numbers:

• 80 healthy middle-aged adults took placebo, 300 mg, 600 mg or 900 mg of NMN once daily for 60 days (Yi and colleagues, GeroScience, 2023).
• 500 mg was the highest of three single doses (100, 250 and 500 mg) given to 10 healthy men, with no significant clinical symptoms recorded (Irie and colleagues, Endocrine Journal, 2020).
• 1,250 mg once daily for up to four weeks produced no changes beyond normal physiological variation in 31 healthy adults (Fukamizu and colleagues, Scientific Reports, 2022).
• $0.56 is the cost of one 500 mg capsule from a 90-capsule, $49.99 bottle of Eternal Elixir NMN 500mg (live US store price, checked October 1, 2026).

Where a 500mg dose sits among human NMN trials

None of the trials below gave exactly 500 mg every day for weeks. The daily studies cluster just under and just over it, and that spacing is the most useful thing to understand about this dose. The table lists each trial we verified, the amount it used, and what its authors reported.

Read the table from top to bottom and a pattern appears. Blood NAD rose at 250 mg in older men, and in the 60-day comparison the 600 mg and 900 mg groups reached the highest levels. A 500 mg day falls just under that upper pair and well under the 1,250 mg amount tested for safety. For a healthy adult, that places it in the middle of the studied range.

Two limits are worth keeping in view. Every daily trial here ran for weeks, the longest for 12 weeks, so there are no controlled data on years of use. Four of the six studies also list authors with company affiliations, and in the 1,250 mg safety study the NMN was supplied by the company that employed most of the authors. For a fuller read on tolerability across trials, see what the human safety data on NMN show.

How to take NMN 500mg each day

The simplest NMN 500mg dosage routine is one capsule a day, taken at a time you will remember. The label sets the serving at one capsule, and most of the trials above gave NMN once a day. Splitting 500 mg into two smaller amounts is a personal choice that these trials did not test.

Morning dosing is a practical default. The 2024 Keio University study gave its two 125 mg capsules once daily before breakfast. No trial in this set compared morning with evening dosing, so choose the time you can keep consistent.

Steady daily use matters more than the exact hour. Blood NAD changes in these trials were measured after weeks of daily intake, at 30 and 60 days in the 80-person study, so a few scattered capsules will not tell you much. Give a regular routine about two months before you judge it, and keep a short note on energy and exercise if you want something to compare against.

People who want a higher intake often take two 500 mg capsules instead of buying a separate 1,000 mg product. We compared the routes to a full gram in our 1000mg NMN supplements comparison, including the cost per 1,000 mg. In the 60-day trial, blood NAD was highest in both the 600 mg and 900 mg groups, and the abstract does not single out 900 mg as better than 600 mg.

What a 500mg NMN day costs at Eternal Elixir

Price is part of dosing, because a dose you cannot afford to keep taking will not help you. Eternal Elixir NMN 500mg is $49.99 for 90 capsules on the US store today, down from a list price of $64.99. At one capsule per serving that is 90 servings, or about $0.56 a day and roughly $17 for a 30-day month.

The second way to reach 500 mg is the Eternal Elixir NMN Advanced Longevity Complex. Its “1,200mg” headline is the combined weight of six actives per two-capsule serving, and only 500 mg of that is NMN. The rest is 250 mg of TMG, 200 mg of pterostilbene, 100 mg of trans-resveratrol, 100 mg of quercetin phytosome and 50 mg of apigenin.

The complex works out to 30 servings at about $2.17 each. It suits someone who wants NMN and several polyphenols in one step. If you only want NMN at 500 mg, the single-ingredient capsule costs about a quarter as much per day. View NMN 500mg on the US store for the current price before you buy.

Who should check with a clinician before taking NMN

Every trial in the table enrolled healthy adults, so the data say little about anyone outside that group. Talk to your doctor or pharmacist first if you are pregnant or breastfeeding, take prescription medicines, or are managing a medical condition. NMN is an adult supplement, and none of these studies included children.

The trials here reported NMN as well tolerated. The 1,250 mg safety study found no changes beyond normal physiological variation across its blood, urine and body composition tests. That is reassuring at 500 mg, which is less than half that amount, but it does not replace a conversation with a clinician who knows your medications.

One more practical point concerns the label itself. Buy from a seller that states the NMN amount per capsule on the front of the bottle and lists every other ingredient. Eternal Elixir NMN 500mg declares 500 mg per capsule and lists rice flour and a cellulose capsule as its only other ingredients, so you can see exactly what one capsule contains.

The bottom line on an NMN 500mg dosage

A 500 mg daily dose is a middle point in the published NMN research. It sits between trial doses that raised blood NAD in healthy adults and well under the highest amount tested for safety. From Eternal Elixir it is one capsule at about $0.56 a day, and the trials measured their changes after weeks of daily use.

If you are still choosing a format, our breakdown of liposomal NMN versus standard capsules looks at the absorption claims. The supplement dose gap report shows how label doses on US shelves compare with the amounts used in trials.

NMN 500mg dosage FAQ

Is 500 mg of NMN a day enough?

For healthy adults, 500 mg sits in the middle of the doses human trials have used, from 250 mg to 1,250 mg a day. Blood NAD rose at 250 mg in older men and at 300 mg and above in middle-aged adults, with the highest readings at 600 mg and 900 mg. The right amount for you depends on your goals and your clinician’s view, and no trial has shown a lifespan effect at any dose.

Is there a downside to taking NMN?

The trials here reported NMN as well tolerated over four to twelve weeks, including 1,250 mg a day for four weeks. The main gaps are length and population, because there are no controlled data on years of use and the studies enrolled healthy adults. Cost is the other practical downside, at about $0.56 a day for a 500 mg capsule from Eternal Elixir.

Should I take NMN in the morning or at night?

Morning is the usual choice, and the 2024 Keio University trial gave its NMN before breakfast. No trial in this set compared morning with evening dosing. Pick the time you will stick with every day.

Can I split a 500 mg NMN dose into two 250 mg doses?

You can, although the trials mostly used one daily dose and did not compare split schedules. Splitting does not change the total of 500 mg a day. One capsule with breakfast is usually the easier habit to keep.

What is the difference between NMN and NAD?

NAD+ is the coenzyme your cells use in energy metabolism, and NMN is one step before it in the pathway the body uses to make NAD+. Taking NMN supplies that precursor, which is why trials measure blood NAD after supplementation. For a related precursor, see how NMN compares with nicotinamide riboside.

Is NMN really worth the hype?

The human evidence is real but modest. Oral NMN raises blood NAD, and some trials reported changes in walking distance or aerobic markers over several weeks, but it has not been shown to extend human lifespan. If you take it, a moderate dose such as 500 mg and realistic expectations make sense, and our NMN and resveratrol comparison covers the most common pairing.

What brand of NMN is the best?

Our pick is Eternal Elixir NMN 500mg, and we make it, so weigh that. It declares 500 mg of NMN per capsule, lists rice flour and a cellulose capsule as its only other ingredients, and costs about $0.56 per daily capsule at $49.99 for 90. Whatever you buy, check that the label states NMN per capsule instead of a combined total of several ingredients.