Explore one mineral or vitamin at a time, or build your own supplement stack.
Tap a mineral or vitamin to see what helps it, and what gets in its way.
Start here
Here's what you'll see once you do.
It lights up its connections
Every mineral it interacts with highlights right on the wheel, color-coded so you can read the relationship at a glance.
You get the full story on each connection
Not just "good" or "bad" — each one shows exactly how they interact (gut absorption, bone regulation, and so on), how strong the effect is, and how solid the evidence is.
Learn what it actually does for you
Expand "Learn more" for what the mineral does in your body, what it's good for, where to get it naturally from food, and the signs you might not be getting enough.
Taking more than one supplement? Add each one to your stack to check them all against each other at once.
General reference only, not medical advice — relationships and reference ranges shown are simplified and individual needs vary. Check with a healthcare provider before combining supplements.
Minerals and vitamins don't work alone. Some help each other, some compete, and some do both depending on the situation.
Everything it interacts with lights up on the wheel. Tap another to switch, or tap the centre to clear.
Each connection explains how the two interact, how strong the effect is, how solid the evidence is, and what to do about it.
It's a visual map of how minerals and vitamins affect each other. Some pairs help each other's absorption or function, some compete, and some do both depending on the situation. Tap any nutrient to see its connections.
Twelve common minerals: calcium, phosphorus, magnesium, potassium, sodium, iron, zinc, copper, manganese, chromium, selenium and iodine. Switch on Full Spectrum to add boron, molybdenum, sulfur and cobalt, and switch on Vitamins to add vitamins D, C, A and K.
Not necessarily. Many interactions only matter at high supplement doses, and can often be managed by taking the two at different times. Each connection comes with a practical tip. If you take medication or have a health condition, check with a pharmacist or doctor first.
Every interaction carries an evidence label: well established, some evidence, or preliminary. Preliminary means the research is early or mixed, so treat it as something to be aware of, not a firm rule. The wheel is a simplified general reference and is not medical advice.
Yes. The wheel and all the interaction information are free, and you can check up to two items against each other in My Stack. Premium, at £2.99 a month, checks your whole stack and turns it into a daily plan.
The free wheel needs no account, and your stack and notes stay in your browser on that device. Premium members have an account, and their stack and notes are saved to it so they follow them between devices.
This is an early version. Tell us what's confusing, what's missing, or anything you think is wrong.
General reference only, not medical advice. Relationships and reference ranges are simplified and individual needs vary. Check with a healthcare provider before combining supplements.