For retailers and brands

PerDose is a UK price comparison for supplements. Every product is compared on the price of one standard dose of its active ingredient, so a shopper can see what a tub really costs rather than what the pack costs. Prices come from retailers' own affiliate feeds and are re-checked every morning. Nothing runs against a retailer's pages day to day: a retailer that has no feed yet is read once from its published product data, and those rows are replaced the day its feed arrives.

How your products appear

• Each product is one row: its name, the label's own amount per serving, the price per standard dose, the cost per month, how long the pack lasts, and a button that opens the product on your site.
• The arithmetic behind every figure is shown under the row, with the words from your listing it came from.
• Rows are ordered by price per dose and nothing else. No retailer or brand can pay for position, and there are no ratings, reviews or editorial rankings of products.
• Your delivery rule is shown beside the price, as published on your site, and is never folded into the ranking.
• A product whose label we cannot read with confidence is not shown until it has been confirmed; nothing is ever ranked on a figure that was not stated.

Your range on one page

A brand with three or more priced products has a page of its own listing its whole range per dose, grouped by supplement, with no other brand’s products on it: Myprotein, ZipVit, Protein Works, VitaBright, Codeage, Nature's Best, Pure Encapsulations, Simply Supplements, Bulk, Metagenics, WeightWorld, Thorne, Designs for Health, Myvitamins, Applied Nutrition, NOW Foods, Vitabiotics, BioCare, Boots, Wild Nutrition, Healthspan, Solgar, Higher Nature, Cytoplan, Momentous, BodyHealth, Zooki, Transparent Labs, MaryRuth's, KIKI Health, Optimum Nutrition, Seeking Health, Ancient Nutrition, Vimergy, ProHealth Longevity, Redmond Life, Vivo Life, HealthAid, Holland & Barrett, Terranova, Bio-Synergy, Natroceutics, Sunwarrior, Trace, Hunter & Gather, Myvegan, NaturesPlus, Puresport, Renue By Science, Promix Nutrition, Reflex Nutrition, Double Wood Supplements, Quicksilver Scientific, Hifas da Terra, Natures Aid, Together Health, LMNT, Life Extension, Webber Naturals and Holista, Sodii, LMNT Electrolytes, Love Life Supplements, Nuzest, Ancient + Brave, DoNotAge, Longevity Box, BodyBio, Dr.vegan, Erewhon, Quest, Roundway Supplements, Youth & Earth, MARCHON, Planet Paleo, Real Mushrooms, 1st Phorm, Bare Biology, Inessa, Well.Actually., Zita West, Bodybuilding Warehouse, DIRTEA, Dr. Mercola, Healthspan Elite, Bulletproof, Fushi, Purovitalis, Theralogix, TruHeight, Biogena, CanPrev, Cymbiotika, Freja Foods, Humantra, I'm Nutrients, Lamberts, Organifi, Puori, vitalityPRO, ARMRA, Blueprint, BrainMD, Equip Foods, Jarrow Formulas, Mushrooms For Life, New Nordic, Vital Nutrients, WeNatal, APE Nutrition, Biotics Research, Charava, Eidon, Feel Supreme, Formetta, GP Nutrition, NBPure, PlantFusion, Rho Nutrition, Viridian Nutrition, Absolute Collagen, Nature's Answer, Omre, Sports Research, SuperFeast, The Ultimate Human, TRIP, Wiley's Finest, Ascent Protein, BPN, Carlson, Energybits, Form Nutrition, Minami, Niagen Bioscience, Pürblack, Ritual, SULT, Veganicity, Vital Proteins, BetterYou, Bio Health, H2Tab, HINNAO Technology, My Way Up, MyPRO, Sprout Living, The Organic Protein Company, 4 HIM & HER, Aduna, Almus, Ancient Purity, Be Well By Kelly, Cadence, Cowboy Colostrum, fourfive, HRI, huxley, Just Ingredients, MADE OF PROTEIN, Nutraconcepts, One Nutrition, Vitaminnica, Warrior. Each form on it opens the full table where the products are ranked.

How the site reaches shoppers

• Search engines. Every supplement, form, product and brand has a page of its own, titled for what shoppers search (“cheapest magnesium glycinate UK”, “vitamin D3 price per 1,000 IU”), and the sitemap dates each page by its last price change.
• Guides. 99 guides to individual supplements and 106 answers about units, labels and prices, each leading to the price tables.
• Data. Data reports written for journalists, and the open dataset below, both of which carry a link back.

What we never do

• Bid on your brand name or trademarks in paid search.
• Publish, scrape or generate voucher codes, or run cashback or incentivised clicks.
• Make health claims about any product or ingredient, on any page.
• Show a price without the date it was checked, or keep a price past its refresh.
• Use toolbars, extensions, pop-ups or anything that inserts itself into your checkout.
• Hide the relationship: the affiliate disclosure is on every page, and every link to a retailer is marked as sponsored.

How links and tracking work

Links to retailers go through the affiliate network the retailer uses (Awin and Impact today, and Amazon Associates for Amazon). No script from any network runs on this site, and nothing about a visitor is recorded here; see the privacy page and the affiliate disclosure.

Retailers compared today

Prices last checked 20 October 2026.

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• Protein Works
• Optimum Nutrition
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• Reflex Nutrition
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• W-Wellness
• Collagen Superdose
• Lloyds Pharmacy
• Vitamin Planet
• Higher Nature
• Known Nutrition
• ZipVit
• Wild Nutrition
• VitaBright
• WeightWorld
• Solgar
• Viridian Nutrition
• Nutravita
• Bodybuilding Warehouse
• Discount Supplements
• Supplement Needs
• BioCare
• Cytoplan
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• Lyfespan
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Brands

If you make a product that UK retailers sell, it is compared wherever those retailers list it. The figures come from the retailer's listing, not from you; if a listing states a serving or an amount wrongly, tell us and we will check the label and correct it, and the correction is recorded on the corrections page.

The data

Every ranked row is published as one file, perdose-prices.csv(3,996 rows as of 20 October 2026), under CC BY 4.0 with a credit to PerDose. It carries the same figures the tables show and nothing about any visitor. Details on the how we compare page.

Get in touch

Email hello@perdose.co.uk — for affiliate programme applications, feed access, a listing that is wrong, or anything else. How the numbers are made is on the how we compare page.

• Awin publisher ID: 3098456
• Post: Patrick Linsdell, 75 Gillbent Road, SK8 6NQ
• More on the contact page.