Unlocking Your Cellular Potential: The Ultimate Guide to NAD+ Boosters: NMN, NR, and the Future of Longevity

Last updated: November 1, 2026 · Originally published: January 22, 2026 · By Eternal Elixir Editorial

NAD+ boosters are supplements that give your body the raw material to make NAD+, a molecule every cell needs. This guide covers the whole group: what NAD+ does, how NMN, NR, nicotinamide and niacin differ, what human trials have and haven’t shown, and what each option costs in Australia. If you only want the two-way NR vs NMN question, our detailed NMN vs NR comparison goes further into those two.

What NAD+ Does, and Whether It Really Falls With Age

NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell. Cells use it to shuttle electrons while they turn food into usable energy, and a group of enzymes, including the sirtuins, uses it up as they work. The body keeps rebuilding its NAD+, mostly by recycling nicotinamide, a form of vitamin B3.

You will often read that NAD+ halves by middle age. The human evidence for that is thinner than supplement marketing suggests. A 2021 review by Peluso and colleagues found that claims of an overall age-related fall in NAD+ rest on limited data, often from a single tissue or cell type. A 2026 study by Euro and colleagues measured whole-blood NAD+ in healthy people aged 18 to 70 and found the levels did not change with age. Some tissues may still lose NAD+ as we get older, and blood may simply be the wrong place to look. Our article on NAD+ decline by age goes through the tissue studies.

What trials do show clearly is that NMN and NR raise NAD+ in blood. Whether a higher blood level changes how you feel or how you age is still an open question, and this guide keeps those two things apart.

The Main NAD+ Boosters Compared

NAD+ can be built from several forms of vitamin B3. They enter the body’s NAD+ pathways at different points, and the amount of human research behind each differs a lot.

That is why most people shopping for an NAD+ booster end up choosing between NMN and NR. Our article on taking NMN vs NAD+ directly covers the NAD+ capsule question in more detail.

NR vs NMN: How the Two Main Boosters Differ

Chemically, NMN is NR with a phosphate group attached. Inside a cell, an enzyme adds that phosphate to NR to make NMN, and NMN is then turned into NAD+. On paper that puts NMN one step closer to NAD+.

How NMN gets into cells is less settled than many product pages suggest. A 2019 study by Grozio and colleagues reported that a gene called Slc12a8 makes an NMN transporter in the small intestine of mice. In the same year, Schmidt and Brenner published a reply arguing the data did not show that Slc12a8 transports NMN. No study has shown this transporter working in people, so “NMN goes straight into your cells” is a hypothesis, not a fact.

The 2026 head-to-head trial by Christen and colleagues added a twist. Gut bacteria turned both NR and NMN into nicotinic acid, and in blood samples nicotinic acid was the form that boosted NAD+ most strongly. The authors proposed that much of the effect of both NR and NMN taken by mouth runs through the gut. If that holds up, the “one step closer” argument matters less in people than it does on a pathway diagram.

The practical answer to NMN vs NR: at the same daily amount, the one direct comparison found they raised blood NAD+ by a similar amount. Neither has been shown to be better for any health outcome. For the extra trials and costs per milligram, see our full NR vs NMN breakdown.

What Human Trials Have Shown So Far

NMN

• Yi et al., 2023 (GeroScience): 80 healthy middle-aged adults took a placebo or 300mg, 600mg or 900mg of NMN once a day for 60 days. Blood NAD+ rose in every NMN group at day 30 and day 60, most at 600mg and 900mg. Six-minute walking distance improved more than on placebo, and no safety problems turned up. Three of the authors are employees of chemical companies, a conflict the paper declares.
• Igarashi et al., 2022 (npj Aging): 42 healthy men aged 65 or over took 250mg of NMN or a placebo daily for 12 weeks. NAD+ in whole blood rose. Gait speed and grip strength improved only nominally, and body composition did not change.
• Fukamizu et al., 2022 (Scientific Reports): 31 healthy adults took 1,250mg a day or a placebo for four weeks. Blood, urine and body composition tests stayed within normal variation, with no serious adverse events.

Add NMN 500mg to cart · $59.99

NR

• Conze et al., 2019 (Scientific Reports): 140 overweight but otherwise healthy adults took 100mg, 300mg or 1,000mg of NR (as Niagen) or a placebo for eight weeks. Whole-blood NAD+ rose by 22%, 51% and 142% by dose within two weeks and stayed up. There was no flushing, and adverse events were no more common than on placebo. The NR maker funded the trial.
• Martens et al., 2018 (Nature Communications): a six-week crossover trial in healthy middle-aged and older adults found NR was well tolerated and raised NAD+ metabolism.

NMN and NR head to head

Christen et al., 2026 (Nature Metabolism): 65 healthy adults aged 18 to 50 took 1,000mg of NR, 1,000mg of NMN, 500mg of nicotinamide or a placebo each day for 14 days. NR and NMN each roughly doubled whole-blood NAD+, by a similar amount. Nicotinamide did not raise it. The trial was open-label and run by Nestlé researchers.

What hasn’t been shown

• No trial shows that NMN or NR slows ageing or extends lifespan in people.
• A 2025 meta-analysis by Prokopidis and colleagues found the current evidence does not support NMN or NR for keeping muscle mass and strength in adults over 60.
• Most trials are small, last weeks rather than years, and are often funded by ingredient makers.
• Several trials used more than one capsule’s worth. Our label serve is one 500mg capsule a day, and you shouldn’t take more than the label says.

NAD+ and NMN Supplements Sold in Australia, Compared

Most products sold as a NAD+ NMN supplement contain NMN, not NAD+. The table below lists the NMN and NR capsules we priced from Australian sellers, with the cost of taking one capsule a day. Eternal Elixir makes the first two products and they are our picks; the other rows are described from each seller’s own listing.

Prices as of Sep 2026, read from each listing on 28 September 2026. Cost per day is the listed price divided by the capsule count, at one capsule a day. DMG is dimethylglycine.

Add NMN 500mg to cart · $59.99

Who each one suits

• Eternal Elixir NMN 500mg: suits you if you want 500mg of NMN in a single daily capsule and a bottle that lasts three months. It doesn’t suit you if you have decided you want NR’s longer trial record, or if you are pregnant, breastfeeding or under 18.
• Eternal Elixir Pure NR 500mg: suits you if you prefer NR. At 500mg per capsule it has more NR per capsule than the 300mg pharmacy options, at the same $0.67 a day as our NMN.
• Bulk Nutrients NMN: the lowest price per capsule in our table at one capsule a day, and 120 capsules a tub. Bulk charges a flat $9 for shipping.
• Bioglan NMN 500: suits you if you want to pick NMN up in a pharmacy. The pack holds 30 capsules and the label says not to use it for more than 12 weeks.
• Melrose FutureLab NMN 500mg: adds 250mg of DMG per capsule. The label caps NMN at 500mg a day and use at 12 weeks or less.
• Melrose FutureLab NAD+ Booster: a pharmacy NR option with 300mg of NR chloride plus DMG per capsule.
• Tru Niagen: the NR brand used in the Conze trial, with 300mg of NR chloride per capsule. It is the most expensive per day here.

Why We Rate Our NMN 500mg and Pure NR 500mg First

Both products are built the same way. Each capsule holds 500mg of the active ingredient, with rice flour and a cellulose capsule. Each bottle holds 90 capsules, and the label serve is one capsule a day, preferably in the morning, so one bottle is three months of use. At $59.99 a bottle, that is $0.67 a day for either one.

Compared with the 30-capsule pharmacy packs, you pay less per day and buy a quarter as often. The pharmacy NMN packs in our table cost $1.42 to $1.75 a day, and Tru Niagen costs $2.07 a day for 300mg of NR. Bulk Nutrients is the one competitor that edges us on price per capsule, by about a cent a day before its $9 shipping.

Buying two, three or five bottles saves 10%, 15% or 20%, and orders over $100 ship free, so two bottles already qualify. Orders are dispatched in 1 business day, with a 30-day money-back guarantee. If you are still weighing up NMN brands, our Bioglan NMN review and our list of Melrose FutureLab alternatives compare the pharmacy options in more depth.

If you want NMN alongside other longevity ingredients, the Cellular Longevity Stack bundles our NMN 500mg, Spermidine 10mg and Trans-Pterostilbene 500mg for $139.99. It already contains our NMN, so choose it in place of a separate NMN bottle, not as well as one.

How to Take an NAD+ Booster

• Stick to the label serve. For our NMN and NR that is one capsule a day, preferably in the morning. Trials have used more, but more than the label serve isn’t what the product is made for. Our NMN dosage guide sets out the trial doses next to the label.
• Pick one precursor. NMN and NR feed the same pathway, so taking both mostly raises your total intake of one thing. We found no trial that tested them together.
• Give it a few weeks. Blood NAD+ rose within two weeks in the Conze and Christen trials and stayed up with daily use. There is no trial evidence that you will feel a change in that time.
• Keep taking it daily if you want the effect. The blood rise in trials lasted while people kept taking the capsules.

What people pair with NMN or NR

The body clears extra nicotinamide by attaching methyl groups to it. In Irie’s 2020 single-dose study, blood levels of these methylated breakdown products rose with the NMN dose. That is why some people add TMG, a methyl donor; our article on why NMN and TMG are often taken together covers the reasoning. Conze’s trial found NR at up to 1,000mg a day for eight weeks did not disturb one-carbon (methyl) metabolism, so treat TMG as optional rather than required.

Other common pairings are resveratrol, covered in our NMN and resveratrol comparison, and ingredients that work on different parts of ageing biology, such as Ca-AKG and spermidine (see spermidine vs NMN). Our guide to building a complete longevity stack shows how these fit together.

Some people also combine NMN with methylene blue, which our article on stacking methylene blue with NMN covers. Methylene blue is not for anyone taking SSRIs, SNRIs, MAOIs or other serotonergic medicines, because of the risk of serotonin syndrome. It is also not for people with G6PD deficiency, during pregnancy or breastfeeding, or for anyone under 18, and it can colour urine blue or green. Talk to your doctor before trying it if you take any prescription medicine.

Safety: Side Effects and Who Should Skip NAD+ Boosters

In short trials, NMN and NR have been well tolerated. A 2026 meta-analysis by Yang and colleagues pooled 15 randomised trials of NMN at 250mg to 2,000mg a day, lasting 14 days to 24 weeks. NMN did not increase adverse events and did not significantly raise the liver enzymes ALT or AST. For NR, Conze’s eight-week trial found adverse events no more common than on placebo at any dose.

The limits of that evidence matter. Safety beyond about six months hasn’t been studied, and two Australian pharmacy NMN labels (Bioglan and Melrose FutureLab) advise using NMN for 12 weeks or less.

Talk to your doctor before taking any NAD+ booster if you:

• are pregnant or breastfeeding (neither has been studied in pregnancy)
• are under 18
• take prescription medicine or have an ongoing medical condition

The Bottom Line

NMN and NR are the NAD+ boosters worth your money, and on current human data they raise blood NAD+ by a similar amount. Nicotinamide didn’t raise blood NAD+ in the head-to-head trial, and NAD+ capsules have far less research behind them. Neither NMN nor NR has been shown to slow ageing, so buy on what the trials measured, at a price you can keep up. Our pick is Eternal Elixir NMN 500mg at $0.67 a day, with Pure NR 500mg at the same price if you prefer NR.

Frequently Asked Questions

Should I take NR or NMN?

Either one raises blood NAD+ by a similar amount at the same daily dose, according to the only head-to-head trial. Our pick is NMN, because its dose-ranging trial covered 300mg to 900mg a day and a 2026 meta-analysis found no safety signal. Choose NR if you prefer its longer research record. Our NMN and NR cost the same.

Add NMN 500mg to cart · $59.99

Is it safe to take NR and NMN together?

We found no trial that tested them together, and no reported interaction. Because they feed the same pathway, taking both mostly adds up to a higher total dose of one thing. Pick one, keep to its label serve, and talk to your doctor if you take prescription medicine.

What are the downsides of taking NMN?

The main downside is uncertainty. Trials show NMN raises blood NAD+ and is well tolerated for up to 24 weeks, but it hasn’t been shown to slow ageing, and a 2025 meta-analysis found no muscle benefit in adults over 60. Safety beyond about six months isn’t known, and it costs money every day.

Is NMN toxic to the liver?

Not in the trials so far. The 2026 meta-analysis of randomised trials found NMN at 250mg to 2,000mg a day for up to 24 weeks did not significantly raise the liver enzymes ALT or AST. Longer-term data don’t exist yet.

What is the best NAD+ booster in Australia?

Our pick is Eternal Elixir NMN 500mg: 500mg per capsule, 90 capsules for $59.99, or $0.67 a day, shipped from Sydney. Eternal Elixir makes it. If you prefer NR, our Pure NR 500mg is the same price. Bulk Nutrients’ NMN is about a cent a day cheaper per capsule before shipping.

Add Pure NR 500mg to cart · $59.99

Can I take NAD+ directly instead of NMN or NR?

You can buy NAD+ capsules, but there are far fewer oral human trials of NAD+ itself than of NMN or NR. That is why most people raise NAD+ with a precursor. Our NMN vs NAD+ article covers the options.

How long does an NAD+ booster take to work?

In trials, blood NAD+ rose within two weeks of daily NR or NMN and stayed higher while people kept taking it. That is a change in a blood test. No trial has shown a noticeable change in how people feel within a set time.

Sources

1. Christen S, Redeuil K, Goulet L, et al. The differential impact of three different NAD+ boosters on circulatory NAD and microbial metabolism in humans. Nature Metabolism. 2026;8(1):62-73. PubMed 41540253
2. Yi L, Maier AB, Tao R, et al. The efficacy and safety of β-nicotinamide mononucleotide (NMN) supplementation in healthy middle-aged adults: a randomized, multicenter, double-blind, placebo-controlled, parallel-group, dose-dependent clinical trial. GeroScience. 2023;45(1):29-43. PubMed 36482258
3. Igarashi M, Nakagawa-Nagahama Y, Miura M, et al. Chronic nicotinamide mononucleotide supplementation elevates blood nicotinamide adenine dinucleotide levels and alters muscle function in healthy older men. npj Aging. 2022;8(1):5. PubMed 35927255
4. Fukamizu Y, Uchida Y, Shigekawa A, et al. Safety evaluation of β-nicotinamide mononucleotide oral administration in healthy adult men and women. Scientific Reports. 2022;12(1):14442. PubMed 36002548
5. Irie J, Inagaki E, Fujita M, et al. Effect of oral administration of nicotinamide mononucleotide on clinical parameters and nicotinamide metabolite levels in healthy Japanese men. Endocrine Journal. 2020;67(2):153-160. PubMed 31685720
6. Conze D, Brenner C, Kruger CL. Safety and metabolism of long-term administration of NIAGEN (nicotinamide riboside chloride) in a randomized, double-blind, placebo-controlled clinical trial of healthy overweight adults. Scientific Reports. 2019;9(1):9772. PubMed 31278280
7. Martens CR, Denman BA, Mazzo MR, et al. Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nature Communications. 2018;9(1):1286. PubMed 29599478
8. Yang W, Huang J, Tang Z, Chen C, Sun Y. Safety and metabolism-related outcomes of oral nicotinamide mononucleotide supplementation in adults: a systematic review and meta-analysis. Nutrients. 2026;18(14):2251. PubMed 42514320
9. Prokopidis K, Moriarty F, Bahat G, et al. The effect of nicotinamide mononucleotide and riboside on skeletal muscle mass and function: a systematic review and meta-analysis. Journal of Cachexia, Sarcopenia and Muscle. 2025;16(3):e13799. PubMed 40275690
10. Grozio A, Mills KF, Yoshino J, et al. Slc12a8 is a nicotinamide mononucleotide transporter. Nature Metabolism. 2019;1(1):47-57. PubMed 31131364
11. Schmidt MS, Brenner C. Absence of evidence that Slc12a8 encodes a nicotinamide mononucleotide transporter. Nature Metabolism. 2019;1(7):660-661. PubMed 32694648
12. Peluso A, Damgaard MV, Mori MAS, Treebak JT. Age-dependent decline of NAD+: universal truth or confounded consensus? Nutrients. 2021. PubMed 35010977
13. Euro L, Haimilahti K, Jansson S, et al. Dynamics of blood NAD and glutathione in health, disease, aging, and under NAD+-booster treatment. Redox Biology. 2026. PubMed 42628241
14. Eternal Elixir product pages (label facts, directions, multi-bottle pricing): NMN 500mg, Pure NR 500mg.
15. Competitor listings, read on 28 September 2026: Bulk Nutrients NMN, Bioglan NMN 500, Melrose FutureLab NMN 500mg, Melrose FutureLab NAD+ Booster, Tru Niagen (Pharmacy Online).