Knowledge

The longevity shelf is crowded and getting more so. NMN, NR, resveratrol, spermidine, fisetin, CoQ10 — every few months a new molecule gets its moment. If you're trying to decide where to start, the marketing isn't much help, because nearly every product claims to be the one that matters most. So here's a level-headed comparison. The honest headline first: no single supplement has a proven longevity benefit in humans. What differs between these compounds is how much human research exists, how reliably they do the specific thing they're known for, and how early the science still is. That's the lens we'll use. One thing to get straight before the comparison These compounds aren't all trying to do the same job, so "which is best" is partly the wrong question. They cluster into different mechanisms that researchers study: NAD+ precursors — NMN and NR. Studied for their effect on NAD+ levels, a coenzyme that declines with age. Sirtuin-interacting compounds — resveratrol is the most well-known. Autophagy-related compounds — spermidine is most associated with this cellular "cleanup" process in research. Senolytics — fisetin, studied for its interaction with senescent ("worn-out") cells. Mitochondrial support — CoQ10, long studied in the context of cellular energy production. Knowing which bucket a compound sits in tells you more than any ranking. NMN NMN is a precursor to NAD+. Of the compounds on this list, it's one of the most actively studied in human trials — several clinical studies have measured its effect on NAD+ levels. The evidence base is still early: trials tend to be small and short, and raising a biomarker is not the same as a proven health outcome. But if you want a compound where the human research is comparatively active rather than purely preclinical, NMN is a reasonable place to look. NR (Nicotinamide Riboside) NR is the other main NAD+ precursor — a close cousin of NMN, different molecule, same destination. NR has its own body of human research and a longer commercial track record in some markets. The NMN-versus-NR debate is genuinely unsettled, and anyone who tells you one is definitively superior is ahead of the evidence. The short version: they're both NAD+ precursors, and the choice between them is closer than the marketing on either side admits. Resveratrol Resveratrol is the polyphenol most associated with sirtuins in laboratory research. Its weakness is absorption: plain resveratrol is poorly absorbed in the gut and broken down quickly, and independent labs have had trouble replicating some early findings. It's frequently paired with NMN, but the human evidence for resveratrol on its own is less clear-cut than its fame suggests. Spermidine Spermidine is most associated with autophagy in research — the process by which cells clear out and recycle damaged components. The preclinical interest is real, and spermidine occurs naturally in foods like wheat germ, aged cheese and soy. As with the others, the human evidence is early. It's a different mechanism from the NAD+ story, which is exactly why some people are curious about it. Fisetin Fisetin is a plant compound studied as a senolytic — researched for whether it can help clear senescent cells, the worn-out cells that accumulate with age. Animal studies have been encouraging, and at least one small human study looked at markers of senescence. "Promising but early" is the fair summary. Fisetin is a watch-this-space compound rather than a settled one. CoQ10 CoQ10 is the most established of the group, with a long history of use in the context of cellular energy production. Natural levels are understood to decline with age. It sits in a different category from the NAD+ and senolytic compounds — less of a frontier molecule and more of a long-standing one. So where should you start? We're an NMN company, so take this with appropriate salt — but here's the reasoning we'd actually give a friend. Start with one compound, not five. Stacking everything at once means you'll never know what's doing what, and it's an expensive way to find out. Pick a single starting point and give it a fair, consistent run. Favour the compounds where human research is more active. Among this list, the NAD+ precursors — NMN and NR — have comparatively more human study behind the specific thing they're known for. That's a defensible reason to start there. Match the mechanism to your curiosity, not the hype. If the NAD+ story interests you, NMN or NR is the entry point. If you're drawn to autophagy or senolytic ideas, know that you're choosing a more experimental, earlier-stage area — and that's a legitimate choice as long as you go in clear-eyed. Keep your expectations honest. None of these is a shortcut, and none has a proven human longevity outcome. They're long-term, consistent habits for people who find the underlying science interesting — not switches that flip something on. Get individual advice if you take medication, are pregnant or breastfeeding, or have a health condition. Some of these compounds — resveratrol especially — can interact with medicines. Where Ivvion fits We make NMN: Essential at 500 mg a day, and Elite, a 1,000 mg liposomal formulation built for absorption. We chose NMN because it's one of the more actively studied compounds in this space, and we chose liposomal for Elite because absorption is the real bottleneck for a lot of supplements. We're not going to tell you NMN beats every alternative, because the evidence doesn't support a clean league table. What we can say is that it's a reasonable, well-studied place to start. Food supplement. Not a medicine. Does not diagnose, treat, cure or prevent any disease. If you are pregnant, breastfeeding, on prescription medication, or have a health condition, consult your GP before taking any supplement.

If you're a woman in your forties or fifties and you've started reading about NMN, you've probably noticed two things. The marketing is loud. And almost none of it is written for you. Most NMN content was written by, and for, men over 50 in California. That doesn't mean the supplement is only relevant to them — it means the conversation has skipped a question worth asking honestly: what is the research actually studying, and what would a careful woman over 40 want to know before buying? This is that article. We sell NMN, so we have an interest in your buying it. We've still tried to write the piece we'd want our sister or our mother to read first. What NMN is (the boring, accurate version) NMN — nicotinamide mononucleotide — is a small molecule the body uses as a precursor to NAD+. NAD+ is a coenzyme that sits in the middle of how your cells produce energy and repair themselves. The reason NMN became a research subject is straightforward: NAD+ levels in human tissue decline with age. The decline is gradual, it varies between individuals, and the curve is steeper from roughly the late thirties onward. That biology is well-documented. What is not yet established at the standard of evidence required for medicinal claims is whether topping NAD+ back up via NMN supplementation reverses, slows, or affects specific outcomes in women over 40. That distinction matters. We will not tell you NMN will "balance your hormones" or "ease your menopause" or "give you energy". Those claims are not permitted for a food supplement in the UK, and the human research is not yet at a level where they would be honest. What we can tell you is this: NAD+ biology is real, the decline with age is real, and the research being done is serious. The studies are getting bigger and more rigorous each year. That's why a calm, well-formulated NMN supplement has become a normal part of many over-40 wellness routines. Why women over 40 are asking different questions Women's physiology in the perimenopausal and post-menopausal window is different in ways the supplement industry mostly ignores. Metabolic rate shifts. Body composition changes through this window. Many women become more interested in supplements that support general cellular health rather than acute, stimulant-style effects. Bone, joint and skin biology all undergo changes that women notice before the calendar says "menopause". The supplement industry frequently overpromises here. We won't. Drug interactions. Many women over 40 are taking other things — HRT, statins, thyroid medication, antidepressants. NMN's safety profile in healthy adults is encouraging in the studies done so far, but interactions with prescription medications have not been comprehensively studied. If you are on prescription medication, ask your GP before adding any supplement. We mean this — it's not a legal flourish. Cost-per-day matters more. Most women buying NMN over 40 are not biohackers. They want to know whether the supplement is worth the money over six or twelve months. That's a fair question and we answer it below. What the research is actually looking at Most human NMN trials to date are small (20–80 participants), short (8–24 weeks), and mixed-sex or male-only. The endpoints they measure include: NAD+ blood levels — does the supplement raise them? In most trials, yes, in a dose-dependent way. Physical function markers — walking pace, grip strength, treadmill performance. Mixed and modest results, sometimes in older subgroups. Sleep and recovery markers — some signals, methodologically variable. Safety and tolerability — consistently good at doses up to 1,000 mg/day. What you will not yet find: large, long-duration, female-specific trials with definitive outcomes. That's not a reason to avoid NMN. It's a reason to be honest about what you're buying — a credible precursor molecule with promising early research, not a guaranteed effect. We update this article quarterly as new research lands. (Last reviewed: May 2026.) How to choose an NMN supplement if you're a woman over 40 Purity. Look for a brand that publishes a third-party certificate of analysis (COA) for each batch. The COA should confirm NMN purity (≥99% is standard) and screen for heavy metals and microbial contaminants. If a brand doesn't publish a COA, treat that as the answer to your question. Dose. Most adult studies use between 250 mg and 1,000 mg per day. As a general structure: 500 mg/day is a sensible baseline. 1,000 mg/day is the higher end used in research and often chosen by people who want to start at the top of the studied range. Form. Powder-in-a-capsule NMN has historically had variable absorption. Liposomal formulations encapsulate the molecule in a phospholipid shell, which the research suggests improves bioavailability. Brand transparency. The supplement industry has a long history of opaque sourcing. The brands worth your money will tell you where the NMN is manufactured, how it's tested, and what's in the capsule besides the active ingredient. Cost-per-day, not cost-per-bottle. A £50 bottle that lasts 30 days is £1.67/day. A £75 bottle that lasts 60 days is £1.25/day. Work out the daily cost and decide whether it's a price you'd happily pay for the next six months. Subscribe & Save as a sanity check. A brand that offers a discounted subscription is usually signalling that it stands behind the product. Two practical scenarios Scenario 1 — "I'm 42, I exercise, I eat well, I'm curious." A reasonable place to start is 500 mg of a well-formulated NMN, taken in the morning, for three months. Pay attention to sleep, recovery and general energy. Track loosely — don't obsess. After three months, you'll have enough sense of whether you want to continue. Scenario 2 — "I'm 51, I'm post-menopausal, I'm careful with what I take." Talk to your GP if you're on any prescription medication. If you're cleared and you want to try NMN, start at 500 mg/day and reassess at three months. You can step up to 1,000 mg if you'd like to. In both cases: it is a food supplement, not a medicine, and it is part of a healthy lifestyle — not a substitute for one. Where Ivvion fits We make two NMN supplements: Essential — 500 mg/day, capsule form, third-party tested, manufactured in the UK. Elite — 1,000 mg/day, liposomal formulation for higher absorption, third-party tested, manufactured in the UK. We also run a 3-minute quiz that asks five honest questions and recommends one of them. If you'd rather read more first, our NMN UK pillar guide covers the science in more depth. A note on what we won't say We will not tell you NMN will give you more energy. We will not tell you it will ease menopause symptoms. We will not tell you it will improve sleep or focus or skin or any other outcome you might be hoping for. UK advertising rules forbid these claims for food supplements, and on top of the rules, we think you'd rather we be straight with you than sell you a feeling. What we will say is: the underlying biology is real, the research is moving in interesting directions, and a well-made NMN is — for a lot of women over 40 — a sensible addition to a routine you've already built. That's the whole pitch. Food supplement. Not a medicine. Does not diagnose, treat, cure or prevent any disease. If you are pregnant, breastfeeding, on prescription medication, or have a medical condition, consult your GP before taking any supplement.