Step Into
Your Lab.
Reclaim You.
Longevity. Vitality. On Your Terms.
You remember what it felt like to wake up energized, move freely, and feel like yourself. YouthLab is where science meets you — a personalized telehealth clinic built for women in their 40s who are done settling for "fine."
You're in Your 40s.
Not Slowing Down.
You're active, driven, and ambitious — but lately your body isn't keeping pace with your mindset. The fatigue hits harder. Recovery takes longer. You've been told your labs are "normal" while nothing feels normal.
YouthLab exists for you. We go beyond the standard of care to identify root causes and build a protocol that matches your biology, your goals, and your life.
- Menopausal & perimenopausal women seeking real solutions
- Active women plateauing despite a healthy lifestyle
- Anyone exhausted by generic answers and one-size-fits-all care
- Women ready to invest in precision, personalized wellness
Protocols Built for You
Every service at YouthLab is built around one principle: your body is unique, and your care should be too.
Peptide Therapy
Targeted peptide protocols to boost energy, accelerate recovery, improve sleep quality, and support cellular repair — prescribed and monitored by licensed providers.
Hormone Optimization
Comprehensive hormone testing and balancing including GLP-1s, estrogen, progesterone, and thyroid support for women navigating perimenopause and menopause.
NAD+ & Longevity
NAD+ therapy and longevity protocols designed to restore cellular energy, sharpen mental clarity, and help you feel decades younger — from the inside out.
Weight Management
Evidence-based, clinician-supported weight management programs that go beyond calories — addressing hormones, inflammation, and metabolic function at the root.
Functional Wellness Testing
Deep-dive lab panels and functional testing to uncover what standard bloodwork misses — gut health, micronutrients, inflammation markers, and cellular health.
Personalized Programs
Six-month and twelve-month comprehensive wellness journeys combining testing, protocols, coaching, and ongoing provider oversight for lasting transformation.
How YouthLab Works
From your first consultation to your ongoing protocol, we're with you every step — virtually, effortlessly.
Free Consult
A 30-minute discovery call to understand your history, symptoms, goals, and what's truly going on beneath the surface.
Deep Lab Work
Comprehensive functional testing — far beyond standard bloodwork — to map your body's unique biochemistry.
Your Protocol
A fully personalized wellness plan with peptides, hormones, nutrition, and lifestyle strategies designed specifically for you.
Ongoing Support
Regular check-ins, protocol adjustments, and coaching as you progress. We monitor, refine, and celebrate results with you.
Built by Women Like You
We didn't find this path — we needed it ourselves. That's what makes YouthLab different.
Mersini
Foustellis
A licensed pharmacist with over a decade of clinical experience, Mersini brings deep knowledge and a passion for precision wellness. She built YouthLab to be the resource she wished she had.
Liliana
Chavuzzo
A licensed aesthetician who knows beauty radiates from the inside out, Lily bridges the gap between how you look and how you feel — bringing warmth and lived experience to every client.
This Is What
Possible Looks Like.
More energy. Deeper sleep. Clearer thinking. A body that moves and feels the way you remember. Not because of luck — because of science, precision, and a team that actually listens.
YouthLab is 100% virtual — which means you access world-class longevity care from anywhere in Massachusetts. No waiting rooms. No rushed appointments. No compromises.
Start Your JourneyYour Lab Is Waiting.
Schedule your free 30-minute consultation. No pressure, no commitment — just a real conversation about where you are and where you want to be.
Book Your Free Consult