Methodology
How a product ends up in front of you
A match percentage measures one thing: how closely a product fits the preferences you gave us. It is not a quality score, and it is certainly not a health one.
- Products assessed
- 34
- Retailers checked
- 6
- Scoring factors
- 8
- Commercial inputs
- None
The scoring
Eight factors, published weights
Every factor below is a preference you told us about, or a public property of the product. Each carries a fixed weight out of 105. The result is normalised to a percentage and shown with the reasons that produced it, so you can look at a match and disagree with it.
Dietary requirements work differently from the rest. They are not weighted preferences — a product that does not meet one is removed from your results entirely.
- Goal relevance
- 30 / 105
- Dietary requirements
- 22 / 105
- Format preference
- 14 / 105
- Budget
- 13 / 105
- Customer rating
- 8 / 105
- Outcome overlap
- 8 / 105
- Cost efficiency
- 5 / 105
- Availability
- 5 / 105
- Goal relevance. Is this category commonly used for the thing you asked about.
- Dietary requirements. Treated as firm. A product that fails one is removed, not demoted.
- Format preference. Powder, capsules, gummies, drinks, sachets.
- Budget. Judged on cost per serving, not pack price.
- Customer rating. Average score, weighted by how many people left one.
- Outcome overlap. Whether one product covers more than one thing you mentioned.
- Cost efficiency. Cost per serving against the rest of the category.
- Availability. How many retailers currently stock it.
Deliberately excluded
What the score does not know
The matching function is a pure function of your answers and the product catalogue. It is not given commercial data, so it cannot weigh it even accidentally. If you are technically minded, the file is small and does exactly what this page says.
- Whether a product will work for you, or for anyone
- Clinical effectiveness of any ingredient at any dose
- How much commission a retailer pays us
- Whether a brand advertises with us
- How much a brand spends anywhere else
- Anything a brand has asked us to say
Where the limits are
Cost per serving is the fairest single number for comparing products, but it is still crude — a 5g collagen serving and a 10g one are not comparable at the same price. Review scores measure satisfaction, taste and delivery at least as much as anything else. Treat all of it as a starting point for a decision rather than the decision.Where the data comes from
What we hold on each product, and how fresh it is
In this prototype every record is sample data written to demonstrate the platform. In a live build each field below would come from the sources named.
Prices and stock
Retailer feeds and affiliate networks, refreshed daily, with a visible last-checked timestamp and a 90-day history.
Ingredients and amounts
Transcribed from the printed label. Where an amount sits inside a proprietary blend we record it as undisclosed rather than guessing.
Reviews
Aggregated across retailers, with verified-purchase share shown. Themes are counted from review text, never written by us.
Dietary and allergens
Manufacturer declarations. These change without notice, which is why every product page tells you to read the pack.
If a brand or retailer thinks something here is wrong, we would rather hear it than not. The same applies to you — a comparison site that cannot be corrected is not much of one. See the advertising and affiliate disclosure for how the commercial side is kept separate from this.