SuppCo vs CanIStackThis
Short version: they answer different questions, and plenty of people could sensibly use both. SuppCo (now part of Function Health) rates supplement brands: quality, testing, value. CanIStackThis checks your combination: the things you take against each other for known interactions, medications included. Two medications are checked against each other only where one of our rules covers that pair; any other medication pair is for your pharmacist, and the list says so. If your question is "can I take this with my meds?", that's us: as of October 2026, SuppCo's own website and App Store listing do not describe checking supplements against medications.
Feature by feature (as of October 2026)
| Feature | SuppCo | CanIStackThis |
|---|---|---|
| Core question answered | "Is this brand/product good quality?" | "Do the things I take interact?" |
| Supplement and medication interaction checking | Not described on their website or App Store listing | Yes, free, with deterministic danger rules |
| Add prescription medications to your stack | Not described on their website or App Store listing | Yes |
| Condition-aware warnings (blood thinners, pregnancy…) | Not described on their website or App Store listing | Yes, free: the conditions you add with a free account apply to every check |
| DNA report: what nine markers are linked to (MTHFR, COMT…) | Not described on their website or App Store listing | Yes: $29 once, or included with a year of Premium |
| Brand quality ratings & lab testing | Yes, their specialty (TrustScore, TESTED program) | No brand scores or quality ratings of our own |
| Branded-product label totals | Yes: nutrient totals across your stack, from a database of 230,000+ products | Yes: daily totals and limits across all your products (from the NIH label database) |
| Peptides / research compounds | Not described on their website or App Store listing | Listed by name; a compound our rules do not cover is marked Not rated, never passed as fine |
| Sells or recommends supplements | Yes: a buying club that sells supplements, and product recommendations | Never: no ads, no affiliates, no store |
| Free tier | Free, with a paid Pro membership and a paid Buying Club membership | Full interaction checker, free for a list of up to 120 things |
| Platform | iOS and Android apps, and their website | Web + installable app |
When SuppCo is the better tool: you're deciding which brand of a supplement to buy and want a single quality score. Their proprietary TrustScore and TESTED program are genuinely their specialty, and we don't offer anything like them.
When CanIStackThis is the better tool: you already take things (supplements, nootropics, peptides, prescriptions) and want to know what in the combination interacts, what to space apart, where you're doubling up past upper limits, and when to take each. Our interaction rules are written by hand and publicly documented, and we never sell supplements, run ads, or take affiliate commissions.
Every claim in the SuppCo column above was read off their own website and App Store listing, last checked October 2026. We hold no inside information about their product and their plans can change without us noticing, so check their current prices before deciding. Nothing here is sponsored and we take no commission either way. SuppCo is a trademark of its owner, which is not affiliated with CanIStackThis. Spot an inaccuracy? Tell us and we'll fix it. Educational information only, not medical advice.