What if the difference isn’t the supplement, but how well it fits you. Your genes, your mindset, your postcode?
Why When to Take What?
When it comes to supplements, most people rely on marketing or guesswork. WttW cuts through the noise by combining AI insights, scientific studies, and expert guidance – to give you personalized recommendations you can actually trust.
That’s normal! Building new habits is tough. That’s why our AI assistant Edgar keeps you engaged with smart nudges, streaks, and progress visualizations. WttW matches what you need with what motivates you, so healthy routines actually stick.
There’s a lot out there, and not all of it’s clear or credible. That’s why WttW only recommends products that pass our Trusted & Verified process: no fillers, full ingredient transparency, independent lab tests, and recognized certifications. You deserve to know what you’re taking, and trust that it works.
There’s a sea of health apps out there, but WttW is built by a team of digital health UX designers, AI specialists, medical advisors, and trusted partners in health and lifestyle. Our approach blends cutting-edge technology with human insight for maximum impact. What you get is grounded, personal, and actually useful.
How it works.
Tell us your goals
Share your health goals, what you’re taking, any conditions, even blood work if you have it. An AI companion turns it all into a dynamic profile that evolves with you.
Your adaptive plan
You get a supplement and lifestyle plan tailored to your body, habits, and goals. As your profile evolves with you, your tailored plan also adapts as new data comes in, so it always stays relevant and effective.
Track, improve, repeat
From daily reminders and progress visualizations to expert nudges and community streaks, WttW keeps you motivated. You see what’s working, adjust where needed, and build habits that truly last.
Our features do more than just tracking.
A personal health twin that learns with you.
Edgar, your AI health assistant
No one-size-fits-all chatbot, but a trained AI specialist. Edgar understands your patterns, nudges you at the right moments, and grows with you to help healthy routines take root.
Adaptive Supplement Plans
No generic advice: our AI designs supplement and lifestyle routines that evolve as your needs, data, and goals change.
Habit support that works with you
Streaks, progress insights, and timely nudges, designed to keep you going, not wear you out. Not through pressure, but through understanding what works best for you.
Clarity you can trust
Evidence-based insights, explained clearly, so you understand what you’re taking, why it matters, and what’s right for your body.
Experts When You Need Them
Access to doctors and nutritionists, real people to guide you when you need it, not just when things go wrong.
Only the good stuff
Smart reminders when you’re running low. Easy access to supplements we’ve verified – nothing extra, nothing shady.
Our core solution
Shaping the future of supplements.
Edgar, your AI health assistant
Supplements shouldn’t be guesswork. With WttW, we’re creating a digital health companion that understands you, your routines, habits, and goals, and we are combining it with human expertise to give you support that actually fits.
Digital Twin
WttW builds a living model of your health, learning from your routines, supplements, lifestyle and goals. We will be able to give you truly personal guidance, every step of the way.
Trusted & Verified
We only recommend supplements that meet our strict quality standards. Every product is checked for pure ingredients, full transparency, and independent lab testing, and backed by internationally recognized certifications like GMP, FSSC 22000, and Clean Label Project™.
Help us shape the future of health & supplements.
By taking our survey, you:
- Contribute to building the first truly intelligent supplement app.
- Get early insights into supplement habits and trends.
- Have a chance to be among the first beta testers.
- Enter our raffle and get the chance to win a thank-you gift.
Why When to Take What
is a game-changer:
Supplements = a multi-billion $ market, but still confusing & unregulated.
WttW combines AI + expert guidance + real-world evidence in a way no one has before.
Our platform creates value for users, experts, and supplement brands alike.
Scalable, international, and built to set new standards in health & wellness.
But supplements are just the beginning
Our vision is to grow WttW into a holistic health platform – one that doesn’t just guide supplement routines, but also supports nutrition, lifestyle, mental well-being, and preventive health. By starting with a focused, high-demand entry point, we build the foundation for a trusted digital health companion that expands far beyond today’s market.
When to Take What
WttW is in the making – but you can start today.
We’re working with full focus and all our resources to bring WttW live as soon as possible. While our app is still in development, you don’t have to wait: simply use our contact form to request your own personalized supplement and lifestyle plan, created by our human experts.
Jump to the contact form and start today.
If you want to be part of redefining how people
around the world take supplements – let’s talk!
Where we are,
where we’re going
Now – Concept validated, core features defined, first prototypes in progress.
2026 – MVP launch with AI assistant, tracking & expert onboarding.
2027 – Public launch in DACH region, expansion to partners & B2B2C.
2028+ – International growth (US & Nordics), new features like DNA & wearables.
We’re building step by step – but we’re moving fast.
Watch how we build the future of health.
@whentotakewhat
Expertise meets innovation.
We are an experienced team deeply rooted in UX design with a proven track record in the medical field. Together with leading AI specialists and trusted partners from the health and lifestyle sectors, we’re building a platform that blends science, technology, and human insight.
Sarah Blömer
Founder + CEO
UX-Engineering, Strategy and Sales, specialized in UX and riskmanagement for medical products
Matthias Kuss
Co-CEO / Venture Partner
BCG | Zeiss | Allianz
| Fresenius Medical Care Data Solutions
CEO Tyme Group
Markus Oelsner
CFO
Consulting and executive coaching, over 25 years of experience as an executive/entrepreneur
Felix Meusel
CTO
AI specialist | Deep Learning | Multi Level LLM’s / Arttac Solutions
With the help of Business Analysts, Medical Experts, Longevity Enthusiasts & Digital Product Experts.