Join the waitlist
Join the waitlist
The program became an app. Nutrition targets that adapt as your metabolism changes — built on published research by a nutritional scientist living it too.
Join the waitlistYour cycle data stays yours — never sold, never used for advertising.
The formulas inside every mainstream nutrition app were built around a body that isn't in perimenopause. They don't know your resting energy expenditure rises after ovulation, or that under-fuelling an active woman in midlife is the fastest route to hormonal depletion and cortisol elevation. There's a reason things stopped working. Your hormones stopped communicating the way they used to, and they don't read the input data the same way.
Cycle apps track your phase and calorie trackers count your food, but nothing does the maths between them — until now.
Real fuel, not restriction — Mikaela's actual dinner
Sérénité Active calculates your daily fuel and macros from your true physiology — then adapts them within a research-backed range of −150 to +250 calories as your body gives feedback. Choose your calculation model, sync your training, and decide whether workout calories join your day or rest as recovery data.
Macros that align with a body that is in flux, and with how you feel on the day.
Targets recalibrate as your metabolism shifts — within a scientifically supported range, never a crash. Three setup models mean the numbers start from your body.
A global barcode scanner. An AI recipe parser that logs a pasted recipe in seconds. Fiber and energy-availability guardrails that quietly protect you from under-fuelling.
Training and recovery guidance tuned to your current phase — follicular energy is not luteal energy. Every recommendation explained.
Built by a qualified nutritional scientist, cited to published research, and funded by no one whose interests aren't yours.
Inside the app lives a plain-language library of the research behind your targets: why luteal-phase energy needs rise, how energy availability is calculated, when a fat-free-mass model beats a total-weight one. You are never asked to trust a number you can't interrogate.
Explore the science
For 7 years I've worked one-on-one with perimenopausal and cycling women through the Sérénité program — reading blood work, building individual protocols, tracking what works. But I could only ever reach six to eight women a year.
Sérénité Active is that same science, encoded. Every formula referenced. Every recommendation explained. Built by an Honours-qualified nutritional scientist who spends her weekends on trails and gravel roads — and is navigating perimenopause herself.
Mikaela Nell · Founder · Nutritional Scientist, BSc Hons
No advertisers, no data brokers. There are no ads in the app, and there never will be.
Remove your account and every trace of your data — permanently, whenever you choose.
We collect only what the calculations need, encrypted in transit and at rest.
Sérénité Active is in beta — built carefully, without investor pressure, which means early members genuinely influence the product. Founding access, honest build updates, first invitation when doors open.
No spam, no daily emails — just real updates from a real person.