Meet FORM Foundation: The Strength-First Bundle
FORM Foundation is a clinician-guided monthly bundle built for people who want the weight loss GLP-1s deliver without the strength loss that often comes with it. It combines three compounded components in one $499-per-month plan: tirzepatide for metabolic care and appetite regulation, Advanced NAD+ for cellular energy and recovery, and sermorelin, a peptide that supports your body's own growth hormone production, which is tied to lean tissue, sleep, and recovery. It's designed for people who are willing to lift, eat enough protein, and check in, because the bundle supports that work rather than replacing it. Every component is reviewed individually by a licensed provider, and completing the intake doesn't guarantee a prescription.
Here's the problem it's built to solve, how each part contributes, and how to know whether it's the right stack for you.
The problem: losing weight and losing strength usually happen together
GLP-1 medications are remarkably good at helping people lose weight. What gets less attention is what that weight is made of. In the DEXA substudy of the STEP 1 semaglutide trial, and again in research presented at the 2025 Endocrine Society meeting, roughly 40 percent of the weight lost came from lean mass, which includes muscle. That's not unique to GLP-1s; it's what happens with any significant weight loss when nothing is done to prevent it. But it matters more when the loss is large and fast, and it matters most for women and older adults, who start with less muscle to spare.
Losing muscle shows up as feeling weaker, recovering slower, looking "deflated" rather than lean, and, in the research, getting less metabolic benefit from the medication than people who held onto their lean tissue. The good news is that it's largely preventable. Resistance training two to three times a week and a protein intake around 1.2 to 1.6 grams per kilogram of body weight per day can dramatically shift the ratio of fat to muscle lost. Foundation is built around that reality. Its name is the point: build the base, not just a lower number.
The three components and what each one does
Tirzepatide: metabolic care
Tirzepatide is a dual GLP-1 and GIP receptor agonist. It regulates appetite, slows how quickly your stomach empties, and improves how your body handles blood sugar, which together produce the weight loss it's known for; in the SURMOUNT-1 trial, participants lost an average of 15 to 21 percent of body weight over 72 weeks depending on dose. In Foundation it does the metabolic heavy lifting. If you're new to how it works, our beginner's guide to GLP-1s and tirzepatide vs. semaglutide comparison cover the basics, and our side effects guide covers what the first month feels like.
Advanced NAD+: cellular energy and recovery
NAD+ is the coenzyme your cells use to produce energy, and it drops with age and under metabolic stress. Its role in Foundation is practical: people on GLP-1s eat less, and eating less often means less energy for training and slower recovery between sessions. NAD+ supports the cellular energy production that fuels workouts and the repair that follows them. Many people on FORM's NAD+ paths report steadier energy and faster bounce-back within the first few weeks, which is exactly what someone trying to keep lifting through a calorie deficit needs.
Sermorelin: your body's own growth hormone signal
Sermorelin is the component that makes Foundation different from FORM's other stacks. It's a growth hormone-releasing hormone (GHRH) analog: rather than adding growth hormone from outside, it prompts your pituitary to release more of your own, in the body's natural pulsed rhythm, most of it during deep sleep. Growth hormone plays a role in maintaining lean tissue, supporting fat metabolism, and tissue repair, and its natural output declines steadily from your 30s. People using sermorelin most often report deeper sleep first, then improved recovery and a gradual shift in body composition over several months.
It's important to be clear about what sermorelin isn't. It isn't anabolic steroids, it isn't synthetic HGH, and it will not build muscle on its own. It supports the physiology that lets training and protein build muscle. That's why FORM's own FAQ answers "Will this automatically build muscle?" with a plain no.
How the three work together
Foundation treats a weight-loss phase the way a good strength coach would: manage the deficit, fuel the work, protect recovery. Tirzepatide creates the deficit and keeps appetite manageable. NAD+ helps you show up to training with energy despite eating less. Sermorelin supports the sleep and growth hormone signaling that turn training into retained lean tissue. None of the three does the other's job, and none of them does yours. The bundle arrives as three vials monthly, each with provider-guided dosing, so you're not sourcing components separately or guessing at protocols.
Who Foundation is for
Foundation fits a specific person: someone who wants metabolic care but has watched a friend get "skinny-fat" on a GLP-1 and doesn't want that outcome; someone already lifting who's worried a weight-loss phase will cost them their progress; someone over 40 who knows muscle is harder to rebuild than to keep; or someone coming out of a stall who wants a plan with more structure than "eat less." The site's own filter is a good one: this may be for you if you want metabolic care anchored in strength-supportive habits, you can commit to resistance training, nutrition, and follow-up, and you want every component reviewed for your individual needs.
It's not for someone who wants the medication to do all the work. If you're not planning to train, FORM Era at $449 per month, which pairs tirzepatide with NAD+ and glutathione for metabolic care plus antioxidant and skin support, may be the better fit. And if your priority is recovery and physiologic hormone signaling more than weight, FORM Restore is built around that.
What the habits side looks like
Since the bundle is built around habits, here's what FORM providers typically recommend alongside it. Resistance training two to three times a week, focused on compound movements, with progressive load; you don't need to train like an athlete, you need to give your muscles a reason to stay. A daily protein floor of roughly 1.2 to 1.6 grams per kilogram of body weight, spread across meals, which on a GLP-1 usually means planning protein first because appetite won't remind you. Seven or more hours of sleep, which is when sermorelin's effect on growth hormone does its work. And regular check-ins, so dosing can be adjusted as your weight, energy, and training respond. Take a photo and a strength benchmark at the start; the scale will tell you one story and those will tell you the better one.
How to start
Foundation begins the way every FORM path does: a private online intake covering your health history, goals, and training habits, reviewed by an independent licensed provider, typically within one to two business days. The provider evaluates each of the three components individually and prescribes only what's clinically appropriate; you may be approved for the full bundle, for part of it, or referred to a different path. If it's not a fit, you're notified and not charged. Prescribed medications ship monthly from a U.S.-licensed pharmacy, with ongoing support built in. For a walkthrough of the intake itself, see what to expect from a FORM weight-loss intake.
Frequently asked questions
What is FORM Foundation? A clinician-guided monthly bundle from FORM by GBY combining compounded tirzepatide, Advanced NAD+, and sermorelin, designed to support weight loss while protecting strength, recovery, and lean tissue. It's $499 per month.
Will FORM Foundation build muscle? No. Strength and lean-mass outcomes depend on training, nutrition, sleep, age, and health status. The bundle supports the physiology that lets resistance training and adequate protein preserve and build muscle; it doesn't replace them.
Why does muscle matter during weight loss? Roughly 40 percent of weight lost on GLP-1s can come from lean mass if nothing is done to prevent it. Preserving muscle supports strength, function, metabolic health, and how you look and feel at your goal weight.
What is sermorelin and is it HGH? Sermorelin is a peptide that prompts your pituitary to release more of your own growth hormone in its natural rhythm. It is not synthetic HGH and not a steroid.
How is Foundation different from FORM Era? Both include tirzepatide and NAD+. Era adds glutathione for antioxidant and skin support ($449/mo); Foundation adds sermorelin for strength and recovery support ($499/mo).
Do I have to take all three? No. Each component is evaluated individually by a licensed provider, who may prescribe the full bundle, part of it, or recommend a different path. Completing an intake doesn't guarantee a prescription.