How we score supplements

What the score is

A number from 0 to 10 that describes a product as it is labelled. It is not about you: your lab results are not part of the score yet. It is not advice to take, stop or combine products.

Where the product data comes from

• The Dietary Supplement Label Database of the US National Institutes of Health (NIH), with more than 85,000 products. Most of them are sold in the US, so many products from Germany, Austria and Switzerland are not in it yet.
• Label photos that you take in the app.
• Automated reading and analysis: AI models describe each ingredient, its amount and its form, and we check health claims against the EU register of authorised health claims. Automated analysis can contain mistakes.

How the score is calculated

Fixed rules combine four parts. The weights are the same for every product.

• Quality, 40 percent: how complete the label data is, how many ingredients reach a meaningful amount, and the form of each ingredient.
• Fit, 30 percent: whether the product’s health claims match health conditions stored in a profile. The Zyva app does not ask about health conditions, so in Zyva this part has the same neutral value for every product.
• Value, 20 percent: the price compared with the ingredients that reach a meaningful amount. Without a known price, this part is neutral.
• Checks, 10 percent: how well the product’s claims could be confirmed against the EU register.

Safety notes can lower the score. They describe the product and are not a check against your own medicines.

What is not in the score

• Your lab results. If that changes, we will update this page first.
• Advertising or payments. Brands can’t pay for a score or for a better place in Zyva.
• Whether a product works for you. The score is not a recommendation.

Independence

We don’t sell supplements, and we don’t earn commissions on products.

Limits

Label data can be incomplete or out of date, and automated reading can make mistakes. If a score looks wrong, write to [email protected] and we will check it.

Information only. Not medical advice. Talk to your doctor or pharmacist before you start, stop or combine supplements and medicines.