What do you take?
We check each supplement on your list against the rest of it, and name anything we could not check. Free, and you don’t need an account.
Also on Can I stack this
- Your lab resultsFree accountYour latest lab report, beside what you take. Free account.
- Your DNAOne-time report, or with PremiumWhere your genes touch your list. One-time report, or with Premium.
- Your historyPremiumWhat you took, when you stopped, what changed. Premium.
This changes what we show you first. It never changes what we check.
The pharmacy checks your prescriptions against each other, but often not against the supplements you buy off the shelf.
What you get
Checking is free. Premium remembers.
Free
no account needed- The check, and every warning it finds
- Daily totals and limits across all your products
- My day, with spacing
- Questions for your pharmacist, a printout for your doctor
Free account
free, forever- Your list, kept between visits and on every device you sign in on
- Your latest lab report, beside what you take
- Your notes, the reasons you gave, and a page for each notes window
- A calendar file with your times for My day
Premium
- History. What you took, when you stopped, what changed. Every change and every note on one dated printout, for dates you pick, up to one year apart. Two periods of your notes, side by side.
- Lab history, report to report.
- DNA analysis while subscribed. A year also lets you download the report as a file you keep.
DNA report
Upload your 23andMe or AncestryDNA file. We read nine variants across seven genes and show where some of them touch the things on your list. The file is read in memory and never stored.
What it does
One list, checked against itself
Everything you take goes on one list: prescriptions, supplements, and the coffee or energy drink you have most days. Each supplement is checked against the rest of the list, and again whenever the list changes. Coffee and most other foods and drinks can go on the list, but added by name they are marked Not rated, and the check leaves them out. Many supplements are named by none of our rules, so their pairs count as checked with no warning. No warning means only that none of our rules matched that pair.
A check before something new
Bought something new, or been handed a new prescription? Check it against the list you already have and see only what the new thing touches, along with the questions worth putting to a pharmacist.
A day built around what needs keeping apart
Some pairs compete for absorption and belong hours apart. Your day lays the list out in slots to keep those two apart, and says so when they are not.
What a pair check misses
Interactions are checked in pairs, but a daily upper limit needs a total. So the check also adds up 9 nutrients, among them zinc, iron, vitamin D and vitamin B6, across your list. It counts a product only when it knows the amounts, and compares each total with that nutrient's daily upper limit.
What we don’t do
We don’t sell supplements. No ads, no affiliate links. Every warning is free, for everyone. The rules that decide them never ask whether you pay.