About i-Supplement
i-Supplement is an independent comparison platform for dietary supplements. We put the things that actually decide whether a supplement is worth buying — elemental dose, chemical form, third-party testing and real cost per serving — side by side, across the retailers that ship to you.
What we do
We are not a shop. We hold no stock, take no payment and ship nothing. We gather product facts and retailer prices, normalise them so they can be compared honestly, and hand you over to the retailer of your choice to complete the purchase under their own terms.
How we rank products
- Elemental dose per serving — the amount of the actual nutrient, not the weight of the compound.
- Chemical form — because glycinate, oxide and citrate do not behave the same way.
- Third-party testing — published certification where a manufacturer provides it.
- True value — cost per serving, or cost per 100 g for bulk powders, rather than the sticker price.
Commission never influences ranking, and no brand or retailer can pay for placement.
Where prices come from
Prices and stock are taken from retailer feeds and retailer pages and refreshed automatically each day. Every price carries the date and time it was last checked, and anything older than 24 hours is marked as possibly out of date. The price at the retailer's checkout is always the one that applies.
How we make money
We may earn an affiliate commission when you buy through a link on this site, at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. Read the full affiliate disclosure.
Contact and support
Operated by i-Supplement (Athens, Greece). Support: contact@i-supplement.com. Questions, corrections to product data, partnership enquiries and privacy requests all go to contact@i-supplement.com. We reply within a few working days, and within 30 days for data requests.
Statements regarding dietary supplements have not been evaluated by the FDA or EFSA and are not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before starting any supplementation protocol.