# Longevity

Search for longevity supplements in the UK and two kinds of page come back: a retailer's collection, and an article ranking the same ingredients in a different order. An AI overview sits above both, pointing at a newspaper opinion piece. None of the three is a comparison.

Best and median price per ingredient, updated 18 October 2026

| Ingredient | Best price | Product | Median price | Shops | Products |
| --- | --- | --- | --- | --- | --- |
| [NMN](https://supplementscanner.co.uk/search?q=nmn) | £36.72 total price | [Feel Supreme NMN + Astaxanthin NAD+ Booster - 60 Capsules](https://supplementscanner.co.uk/p/feel-supreme-feel-supreme-nmn-astaxanthin-nad-booster-60-capsules-149320) (Vitamin Planet) | – | 1 | 7 |
| [Resveratrol](https://supplementscanner.co.uk/category/resveratrol) | £0.06 /capsule | [The Health Project Resveratrol 100mg \| Heart & Cellular Wellness](https://supplementscanner.co.uk/p/the-health-project-the-health-project-resveratrol-100mg-heart-cellular-wellness-133651) (Discount Supplements) | – | 3 | 3 |
| [Spermidine](https://supplementscanner.co.uk/search?q=spermidine) | £36.98 total price | [Spermidine XT 120 Capsules](https://supplementscanner.co.uk/p/serious-nutrition-solutions-spermidine-xt-120-capsules-130533) (Predator Nutrition) | – | 2 | 2 |
| [Coenzyme Q10](https://supplementscanner.co.uk/category/coq10) | £0.04 /capsule | [Co Enzyme Q10](https://supplementscanner.co.uk/p/myvitamins-co-enzyme-q10-125693) (Myprotein) | – | 9 | 19 |
| [Omega-3 / Fish oil](https://supplementscanner.co.uk/category/omega-3) | £0.03 /capsule | [Omega 3 Capsules 500mg](https://supplementscanner.co.uk/p/simply-supplements-omega-3-capsules-500mg-132093) (Simply Supplements) | – | 10 | 106 |
| [Taurine](https://supplementscanner.co.uk/category/taurine) | £8.98 /kg | [Taurine](https://supplementscanner.co.uk/p/bulk-taurine-125443) (Bulk) | – | 5 | 5 |
| [Quercetin](https://supplementscanner.co.uk/category/quercetin) | – | – | – | 0 | 0 |
| [TMG (betaine)](https://supplementscanner.co.uk/search?q=tmg) | – | – | – | 0 | 0 |

## Five of the eight can be measured, three only counted

Coenzyme Q10, fish oil, taurine, quercetin and resveratrol each sit in a category with a comparison unit attached. NMN, spermidine and TMG sit in no category at all: they are matched on the product name, so the price of the whole pack stands in for a unit. The dividing line is whether a single unit could be honest. NMN is sold as a powder weighed in grams and as capsules printed in milligrams, and nothing converts the one into the other without an assumption.

The label closes that gap by hand. A pot stating 500 mg per capsule, 60 capsules and two capsules a day covers a month; a pouch gives a net weight. A brand may add a purity figure of 99 per cent or higher, and a raw-material name such as Uthever, which fixes an origin and not an amount.

## The percentage is the number that settles spermidine and resveratrol

Spermidine is extracted from wheat germ, and the weight printed largest is the extract, not the spermidine. One brand's capsule declares 3 mg of spermidine from an extract standardised to 5 per cent polyamines and 2 per cent spermidine; on another pack, two capsules holding 800 mg of extract between them declare 1 mg. The front of both says the same word. Where a percentage is printed, that is the figure doing the work.

Resveratrol runs on the same arithmetic. The extract comes from Japanese knotweed (Polygonum cuspidatum, also Reynoutria japonica), and the standardisation is written as a percentage of trans-resveratrol, with 98 per cent a common grade and 500 mg a common capsule strength. Without that percentage, a milligram figure on the front could be either the extract or the substance. A per-capsule rank prices that capsule and leaves the percentage to you.

## Betaine is two products wearing one word

TMG is trimethylglycine, written on most labels as betaine anhydrous, and sold as a powder by the gram. Betaine HCl is a separate product: betaine bonded to hydrochloride, in capsules of 500 to 1000 mg. A name match on betaine returns both, because the word sits on both. The ingredients panel settles which one is in the pot; the front of the pack does not.

## Q10, fish oil, taurine, quercetin and resveratrol each carry a unit

[Coenzyme Q10](https://supplementscanner.co.uk/category/coq10), [fish oil](https://supplementscanner.co.uk/category/omega-3), [quercetin](https://supplementscanner.co.uk/category/quercetin) and [resveratrol](https://supplementscanner.co.uk/category/resveratrol) rank per capsule, [taurine](https://supplementscanner.co.uk/category/taurine) per kilo. Taurine is the only one of the eight whose unit is a weight rather than a piece. A quercetin panel names the form as quercetin dihydrate, and the capsule being ranked is frequently a combination with vitamin C and bromelain, so the quercetin line is one part of what the price covers. The EPA and DHA lines beneath a fish oil front label are worked through in buying cheap fish oil.

A unit levels the container and never the dose. With Q10 it is the milligrams per capsule that decide whether a cheap capsule is also a cheap milligram, and that conversion is in neither the ranking nor any filter. Products are not matched between shops either, so one pot carried by two shops produces two separate rows at two separate prices. Q10 and fish oil also appear under [energy and focus](https://supplementscanner.co.uk/goal/energy-focus) and [immunity](https://supplementscanner.co.uk/goal/immunity), and reading a supplement label sets out what the rest of the wording on a pack commits to.

## Where NMN stands in Great Britain, and where the record stops

The Food Standards Agency writes that novel foods need to be authorised before they can be placed on the market in Great Britain, and that decisions the EU took after 1 January 2021 do not carry over into GB. The European Commission, for its part, classes nicotinamide mononucleotide as a novel food on the ground that a history of consumption in the EU before 15 May 1997 has not been established, and lists a beta-NMN application among its ongoing ones. Those are their two positions, taken from two different registers. The FSA's published list of Article 4 outcomes, read in September 2026, carries no entry for NMN, which leaves nothing more definite to cite for Great Britain than the general rule.

## Sources

- [Food Standards Agency: novel foods authorisation guidance](https://www.gov.uk/government/publications/novel-foods-authorisation-guidance/novel-foods-authorisation-guidance)
- [Food Standards Agency: outcomes on novel food consultations](https://www.gov.uk/government/publications/outcomes-on-novel-food-consultations/outcomes-on-novel-food-consultations)
- [European Commission: novel food status of nicotinamide mononucleotide](https://food.ec.europa.eu/system/files/2022-10/novel-food_consult-status_nmn-cz.pdf)
- [European Commission: ongoing novel food applications and notifications](https://food.ec.europa.eu/food-safety/novel-food/authorisations/summary-applications-and-notifications_en)

## Frequently asked questions

### Which supplements do people buy under the word longevity?

No single answer is settled, because longevity is a word shops merchandise under rather than an ingredient or a measurement. The UK collection pages that rank for the term put different things under it: one lists NMN, resveratrol, CoQ10, collagen peptides, omega-3, vitamin D and adaptogens, another leads on CoQ10, spermidine, fisetin, Ca-AKG and boron. Eight of those recurring names are gathered and priced.

### Which longevity supplements can be compared on a price per capsule?

Coenzyme Q10, fish oil, quercetin and resveratrol sit in categories ranked per capsule, and taurine in one ranked per kilo. NMN, spermidine and TMG have no category, so they are matched on the product name and listed at the price of the whole pack. Turning that pack price into a price per gram is a sum the label supplies the figures for.

### Why does NMN have no price per capsule?

Because it has no category, so it is matched on the product name instead, and no common unit fits what that name returns. NMN is sold as a powder weighed in grams and as capsules printed in milligrams. A pot stating 500 mg per capsule and 60 capsules carries everything the conversion takes; a pouch carries a net weight.

### Do longevity supplements really work?

A price comparison cannot answer that and does not try. What it can settle is which shop is cheapest today for a given pot, and what one capsule or one kilo works out at where a category exists. The question of whether to buy at all belongs with a pharmacist or a GP.

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Source: Supplementscanner, https://supplementscanner.co.uk/goal/longevity (live prices per product)

Information for comparison, not medical advice. Ingredients are chosen based on what people often search for, not as a treatment.