Collagen in the UK runs from about £15 a tub to over £60, and the price on the front tells you almost nothing. Two pouches at the same price can contain wildly different amounts of the thing you are actually buying. Here is the one calculation that makes every product comparable.
Most people compare collagen on price per tub. It is the obvious thing to do and it is close to useless, because tubs are different sizes, scoops are different sizes, and the amount of collagen inside each scoop varies by a factor of five or more across the UK market.
The Quick Answer
The Calculation
Three numbers, two divisions. You need the price, the number of servings in the pack, and the grams of collagen in one serving. All three should be printed on the pack, though the third one often is not, which is a finding in itself.
| Step | Sum | Revayo Prime |
|---|---|---|
| 1. Cost per serving | Price ÷ servings in the pack | £39.99 ÷ 30 = £1.33 |
| 2. Cost per gram of collagen | Cost per serving ÷ grams of collagen per serving | £1.33 ÷ 14.77g = 9.0p |
| 3. On subscription | Same sum, subscription price | £35.99 ÷ 30 ÷ 14.77g = 8.1p |
That is the number to write down. It is the only figure that lets you put a 300g tub next to a 500g pouch next to a box of sachets and know which one is actually better value.
Why Cost Per Tub Misleads You
This is why two products at identical shelf prices can differ enormously in what they cost you per gram of collagen. The variable nobody advertises is how much of the scoop is collagen.
What To Do When The Dose Is Not Stated
You will run into this. A fair number of UK collagen products do not state grams of collagen per serving anywhere on the pack. They state the serving size, they list collagen first in the ingredients, and they leave it there.
When that happens you cannot do the calculation, and that is the answer. A brand that will not tell you how much of the active ingredient is in a serving has made a decision about what it wants you to know. You do not need to assume bad faith to notice that the brands with the highest doses tend to be the ones printing them in the largest type.
If you want a single test to apply in a supermarket aisle or on a product page, it is this: can you find the grams of collagen per serving in under thirty seconds? If not, move on. There are plenty that will tell you.
What A Reasonable UK Price Looks Like
There is no official benchmark, and anyone quoting one is guessing. What you can do is use the calculation to sort products into rough bands and then decide what you are comfortable paying.
Subscription, Multibuy And What They Actually Save You
Most UK collagen brands discount for subscription, usually somewhere between 10% and 20%. Run the discounted price through the same calculation rather than taking the headline percentage at face value, because a 20% saving on an expensive product can still land above a 0% saving on a cheaper one.
Revayo Prime is £39.99 one-off, or £35.99 on subscription, which works out at £1.20 a day and 8.1p per gram of collagen. Subscriptions can be cancelled at any time.
The other thing worth saying about price: the cheapest collagen in the world is worthless if it sits unopened. A powder you actually take at a sensible cost per gram beats a bargain you abandon in week three. Consistency is the variable most people get wrong, and no amount of price optimising fixes it.
Revayo Prime - £39.99
14.77g of FORTIGEL® hydrolysed bovine collagen peptides and 189.9mg Vitamin C per 15g serving, with 36.3mg of stevia. Three ingredients, every amount printed on the pack. That is 9.0p per gram of collagen, or 8.1p on subscription.
Free UK delivery · Subscribe from £35.99, cancel any time
Collagen Price FAQs
How do I work out cost per gram of collagen?
Divide the pack price by the number of servings to get cost per serving, then divide that by the grams of collagen in one serving. For Revayo Prime: £39.99 divided by 30 servings is £1.33, divided by 14.77g is 9.0p per gram.
Why is cost per tub a bad comparison?
Because tub sizes, serving sizes and the proportion of each serving that is actually collagen all vary widely. Two products at the same shelf price can differ by several times in cost per gram of collagen.
What if the pack does not state grams of collagen per serving?
Then you cannot calculate the value, and that is useful information on its own. Treat an undisclosed dose as a reason to look at something else.
Is more expensive collagen better?
Not reliably. Price reflects pack format, sourcing, flavouring and brand positioning as much as it reflects the amount of collagen. Work out cost per gram and judge from there.
Does marine collagen cost more than bovine?
Generally yes. Marine collagen is usually more expensive per gram than bovine, which is part of why marine products often come in smaller packs or smaller servings.
How much does Revayo Prime cost per day?
£1.33 a day at £39.99 for 30 servings, or £1.20 a day on subscription at £35.99. Each serving is 15g and contains 14.77g of FORTIGEL® collagen peptides.
Great Britain Nutrition and Health Claims Register: authorised Vitamin C and collagen formation claim.
Retained EU Regulation No 1169/2011 on the provision of food information to consumers, as it applies in Great Britain.
Vitamin C contributes to normal collagen formation for the normal function of cartilage, bones, skin, blood vessels, gums and teeth. This article is for general information only and does not replace medical or dietetic advice. Revayo Prime is a food supplement and is not intended to diagnose, treat, cure or prevent any disease. Speak to a healthcare professional before using supplements if you have a medical condition, are pregnant or breastfeeding, take prescribed medicines or are under 18. Food supplements should not replace a varied, balanced diet and healthy lifestyle.