The science, without the jargon
How it actually works.
No willpower lectures. No miracle claims. Just the biology behind modern weight, energy, sleep, and intimacy care — explained the way a good doctor would explain it, with a licensed provider deciding what's right for you.
First principles
Medicine that works with you, not against you.
Every therapy Feel20 offers shares the same three ideas. Understand these and the rest of the page is just detail.
It speaks your body's own language
These therapies aren't foreign chemicals forcing a result. GLP-1 medications copy a hormone you already make after a meal; NAD+, sermorelin, and PT-141 work with pathways your body already runs. The goal is to restore a signal, not override you.
It's studied, not promised
Every molecule here has a body of research behind it. We describe what each one has been studied for — appetite signaling, cellular energy, sleep architecture, desire — and let your provider translate that evidence into what's right for you.
A provider stays in the loop
Mechanisms don't dose themselves. A US-licensed provider reviews your history, decides whether treatment is appropriate, starts you low, and adjusts as your body responds. Science is the engine; the physician is the steering wheel.
GLP-1, in plain English.
When you eat, your gut releases a hormone called GLP-1 that tells your brain you're satisfied and helps your body manage blood sugar. For a lot of people, that signal is quieter than it should be — so hunger never really switches off.
GLP-1 medications like semaglutide and tirzepatide copy that hormone. They act on the brain's hunger and fullness centers, slow how quickly your stomach empties, and support steadier blood sugar. The result people describe is simple: the constant food noise gets quiet.
This is the mechanism behind the weight-care results you've been hearing about — prescribed, dosed, and adjusted by a licensed provider rather than guessed at.
Semaglutide · Tirzepatide
In your brain
The food noise gets quiet
GLP-1 acts on the hunger and fullness centers of the brain — the same circuitry your own gut hormone speaks to after a meal. People describe the constant, low-grade pull toward food simply getting quieter.
In your stomach
Fullness arrives sooner, stays longer
It slows how quickly the stomach empties, so a normal-sized meal registers as enough — and that satisfied feeling holds well past the table instead of fading in an hour.
In your bloodstream
Steadier blood sugar
It supports glucose-dependent insulin release and lowers glucagon, helping smooth the spikes and dips that drive cravings and the afternoon crash.
The anchor · the mechanism
Three things GLP-1 is studied to do.
GLP-1 is a hormone your gut releases after you eat. It tells your brain you're full and helps your body manage blood sugar. GLP-1 medications like semaglutide and tirzepatide copy that signal — turning down the constant food noise, helping you feel satisfied sooner, and supporting steadier glucose. They're the medications behind the weight-care results you've been hearing about, and they work best with a provider dosing them to you and adjusting over time.
The molecules
Four programs. Four mechanisms.
Each Feel20 program targets a different system in the body. Here is what each molecule is studied for — the science of how it works, and the honest note on the research behind it.
Semaglutide · Tirzepatide
GLP-1 Weight Care
GLP-1 receptor agonists mimic a hormone your gut releases after eating. By acting on the brain's appetite centers and slowing how fast the stomach empties, they quiet the constant food noise so eating less doesn't feel like a fight.
- Appetite signaling
- GLP-1 receptor agonists mimic a hormone your body makes after eating, acting on the brain's hunger and fullness centers to quiet constant food noise.
- Slowed gastric emptying
- They slow how quickly the stomach empties, so you feel full sooner and longer after a meal.
- Blood-sugar regulation
- They support glucose-dependent insulin release and reduce glucagon, helping keep blood sugar steadier.
- Provider-managed dosing
- Treatment starts low and is titrated by your provider to balance results against side effects.
What the research says: GLP-1 receptor agonists are among the most-studied medications in modern metabolic medicine, with large clinical trials examining their effect on weight and blood-sugar control. Compounded formulations are not FDA-approved; your provider will explain what they prescribe and why.
NAD+ · MIC-B12
NAD+ & B12 Energy
NAD+ is a coenzyme your mitochondria use to turn food into usable energy, and it declines with age. Paired with B12, it's studied for supporting the cellular machinery behind everyday stamina and mental clarity.
- Cellular energy production
- NAD+ is a coenzyme central to how your mitochondria produce ATP — the body's basic energy currency.
- Metabolic cofactor
- B12 supports red-blood-cell formation and neurological function tied to energy and mental clarity.
- Age-related decline
- NAD+ levels fall as you age; replenishment is studied for supporting energy metabolism.
- Provider oversight
- Route and dosing are determined by your provider based on your history and goals.
What the research says: NAD+ and B12 are studied for their roles in cellular energy metabolism. Research is ongoing and individual experience varies. These are physician-guided therapies, not energy drinks — your provider decides whether they fit you.
Sermorelin
Sermorelin Sleep & Recovery
Sermorelin nudges your pituitary to release its own growth hormone instead of replacing it. Because GH naturally peaks during deep sleep, supporting that rhythm is studied for more restorative rest and overnight recovery.
- Growth-hormone axis
- Sermorelin is a growth-hormone-releasing-hormone analog that prompts your pituitary's own GH release rather than replacing it.
- Sleep architecture
- GH secretion peaks during deep sleep; supporting that rhythm is studied for more restorative rest.
- Overnight recovery
- Studied for its role in tissue repair and the recovery your body does while you sleep.
- Provider oversight
- Prescribed, dosed, and monitored by a US-licensed provider.
What the research says: Sermorelin is a growth-hormone-releasing-hormone analog studied for its role in the body's own GH rhythm rather than replacing it. Research is ongoing and individual experience varies. It is prescribed and monitored by a licensed provider.
PT-141 · Glutathione
Intimacy & Glow
PT-141 acts on desire centrally — through melanocortin receptors in the brain, where wanting begins — rather than through blood flow. Glutathione, the body's master antioxidant, is studied for cellular defense and skin brightness.
- Central desire pathway
- PT-141 (bremelanotide) activates melanocortin receptors in the brain, acting on desire centrally rather than through blood flow.
- Master antioxidant
- Glutathione is the body's primary intracellular antioxidant, studied for skin brightness and cellular defense.
- Discreet by design
- Prescribed after a provider consultation and shipped in plain, discreet packaging.
- Provider oversight
- Appropriateness and dosing are determined by a US-licensed provider.
What the research says: PT-141 (bremelanotide) is studied for its action on desire through central melanocortin pathways. Glutathione is studied as the body's primary intracellular antioxidant. Research is ongoing and individual experience varies. Both are physician-prescribed.
How we handle your medicine
The boring parts we refuse to skip.
Where your medication comes from and how it's handled matters as much as the molecule itself. Here's how we do it — including the caveat plenty of telehealth sites bury.
State-licensed compounding pharmacies
If a provider prescribes a compounded medication, it's prepared by a state-licensed US compounding pharmacy operating under state board oversight — not a gray-market supplier.
Cold-chain shipping
Temperature-sensitive medications are shipped cold, in plain and discreet packaging, to keep them stable from the pharmacy to your door.
Standard quality controls
Compounding pharmacies follow standard quality-control practices under regulatory oversight. Your provider can speak to what they prescribe and why.
The FDA caveat, said out loud
Compounded medications are not FDA-approved, though the pharmacies that prepare them are licensed and regulated. We tell you up front, not in fine print.
Provider-determined dosing
A US-licensed provider determines whether treatment is appropriate and sets every dose. Nothing here is a recommendation to dose yourself.
Our honesty rules
The fine print is the whole point.
Good science is careful about what it claims. Here's how we keep the language above honest — and why a provider, not a marketer, makes the call.
“Studied for,” not “proven to”
We describe what research has examined, not outcomes we can guarantee. Compounded medications are not FDA-approved, and individual results vary.
Prescription-gated by design
Nothing here is sold off a shelf. Treatment is available only after a licensed provider reviews your information and decides it's appropriate.
Safety reviewed up front
Your provider walks through the full safety information, starts you at an appropriate dose, and monitors how you respond before any change.
What we always say out loud
- Individual results vary
- These therapies are studied for specific roles in the body, but they don't work the same for everyone. We describe how they're studied to work — never a result you'll personally get.
- Side effects are real
- Every therapy here can cause side effects, most commonly when starting or raising a dose. Your provider reviews the full safety information and adjusts based on how you respond.
- Not right for everyone
- Some people won't qualify, and a provider may decide treatment isn't appropriate. If that's you, you'll hear it honestly — and you pay nothing unless a provider prescribes treatment.
- A provider decides — and stays involved
- Prescriptions are only written after a US-licensed provider reviews your history, and your care team monitors you with check-ins and dose adjustments over time.
- Tell your provider everything
- Share your complete health history and current medications during your consultation. The more your provider knows, the safer your care.
Plain-English glossary
The words, decoded.
- GLP-1
- Glucagon-like peptide-1 — a hormone your gut releases after eating that signals fullness and helps manage blood sugar. GLP-1 medications copy that signal.
- Receptor agonist
- A molecule that fits a cell's receptor and switches it on, the way a key turns a lock. GLP-1 medications are receptor agonists for the GLP-1 receptor.
- Titration
- Adjusting a dose gradually — usually starting low and increasing slowly — so your provider can balance how you respond against side effects.
- Coenzyme
- A helper molecule your cells need to run essential reactions. NAD+ is a coenzyme central to turning food into usable cellular energy.
- Compounded medication
- A medication prepared for you by a state-licensed compounding pharmacy. Compounded medications are not FDA-approved, though the pharmacies that prepare them are licensed and regulated.
- Cold chain
- Keeping a temperature-sensitive medication cold from the pharmacy to your door so it stays stable and effective.
A licensed provider, in your corner
Science is the engine. The physician steers.
Understanding the mechanism is the easy part. The harder, more important part is deciding whether a given therapy is right for you — your history, your medications, your goals. That decision belongs to a US-licensed provider, every time.
They review your information, set honest expectations, start you at an appropriate dose, and adjust based on how your body responds. If treatment isn't a fit, they'll tell you plainly — and you'll pay nothing.
- Every plan starts and stays with a US-licensed provider
- Dosing is titrated to you — never one-size-fits-all
Individual results vary. These therapies can cause side effects; your provider will review the full safety information with you before any prescription. Compounded medications are not FDA-approved.
Curious how it'd work for you?
The eligibility check is free, takes 5 minutes, and a real provider decides which science — if any — is right for your body.
Start your free eligibility checkFree to apply · Prescription only if a licensed provider approves · Cancel anytime
Feel20 is a wellness brand, not a medical group or pharmacy. Medical care is provided by independent, US-licensed healthcare providers, and medications are dispensed by licensed US pharmacies.
Prescription medication is available only if a licensed provider determines it is appropriate for you after a consultation. Not everyone qualifies.
Compounded medications are prepared by state-licensed compounding pharmacies and are not FDA-approved. Your provider will discuss the benefits and risks with you.
Individual results vary. “Feel 20 again” describes how our members want to feel — it is not a promise of any specific medical outcome.