Supplements that work with each other.
Set yours up in three steps.
Stackwell cross-references 400+ evidence-based fact cards to build your personalized plan. No guesswork. No conflicts. No wasted money.
Here's what's really happening
Every day you take supplements without checking, you're gambling with your health — and your wallet.
Your supplements sabotage each other
Calcium blocks iron absorption. Zinc competes with copper. You take them together every morning and wonder why nothing works.
You follow advice from people selling you stuff
That influencer recommending 12 supplements? They get paid per bottle. Your body doesn't care about their affiliate deal.
You're paying for supplements you don't need
Overlapping, conflicting or unnecessary supplements cost money without doing anything. Knowing what you actually need means buying less.
What if you could see exactly which supplements work together — and which ones are fighting each other?
That's what Stackwell does.
How it works
Three steps. Zero guesswork.
Tell us your goals
Health goals, current supplements, lifestyle. We ask the right questions so the AI doesn't have to guess.
Get your personalized plan
Our engine cross-references 400+ evidence-based fact cards against 9 scientific standards. You get a daily schedule: what to take, when, and why.
Track & optimize over time
Log your intake and see your consistency streaks. With Vitalli Plus, the AI assistant adjusts your stack as your goals change.
What you get
Every feature exists for one reason: better outcomes for your body.
Stop supplements from sabotaging each other
Instantly see every conflict and synergy in your stack. Know exactly what works together and what to separate.
Get a plan built by science, explained by AI
A rules-based engine scores and schedules your supplements. Then AI explains every decision in plain language. No black box.
Compare against 9 scientific standards
NIH, DGE, EFSA, and 6 more. See where the science agrees, where it differs, and where you stand.
Take the right thing at the right time
Timing matters. With meals, on an empty stomach, or spaced apart — we optimize every dose for maximum absorption.
Visualize how your nutrients interact
An interactive network graph shows enhancements, conflicts, and dependencies at a glance. Complex biology, made simple.
Zero affiliate links. Zero sponsored suggestions.
We name the standards and fact cards behind a recommendation. We don't sell supplements. We help you use them better.
See it in action
This is what a science-backed supplement experience looks like.
Should I take iron and calcium together?
Take them 2 hours apart. Calcium inhibits iron absorption. I've adjusted your schedule.
Why Stackwell wins
Compare the approaches. Then decide.
Stackwell
5/6Generic supplements
1/6Other apps
1/6Built on science. Not hype.
We have nothing to sell you except better decisions.
Still have questions?
Good. Skepticism means you're paying attention.
Getting started is free. Optional paid plans will come later for the bigger features. We never sell your data, supplements, or ad placements. If we can't earn your trust for free, we don't deserve your money.
Google gives you 10 million conflicting articles. Stackwell gives you one personalized plan built from 400+ evidence-based fact cards, cross-referenced against 9 scientific standards. Without the PhD.
Our engine uses a transparent, rules-based scoring system — not a black box. Every recommendation is traceable to specific evidence-based fact cards with cited mechanisms and dosage ranges. The AI explains; the science decides.
It is transmitted and stored encrypted on servers in the EU, and we never sell it. We do pass on what a feature needs: the AI assistant sends your conversation to Anthropic (USA), the semantic search sends health-context text to Voyage AI, payment runs through Stripe, and usage events go to Uptik without any health content. Every one of them is named in our privacy policy, together with what it receives. Events with a health reference only go out if you consent in your Vitalli account.
Absolutely. Stackwell complements professional medical advice — it doesn't replace it. We actually recommend sharing your Stackwell plan with your healthcare provider. Better-informed patients make better decisions.
Everything about planning, intake logging and interactions, including what Stackwell knows about medicines: Supplement planner with interaction check
Your smarter supplement plan is three steps away.
Free to start. Optional paid plans. Evidence-based.
Build my free planStill not sure? Getting started is free.
Six health apps. One account. One shared context.