Peptides 101

What Even Is A Peptide?

Think of peptides as tiny messengers made of amino acids. They tell your body to do something: burn fat, release hormones, repair tissue, sleep better.

• Peptides = instructions
• Your body = the system carrying them out

This is why they’re everywhere right now, from weight loss clinics to longevity TikTok to the group chat.

The Peptides Cheat Sheet

Before we get into names, here’s the cheat sheet:

• Fat loss + appetite peptides → control hunger + blood sugar
• Growth hormone peptides → body recomposition, sleep, recovery
• Healing peptides → injury + gut repair
• Longevity + “anti-aging” peptides → sleep cycles, cellular aging
• Aesthetic peptides → skin, hair

Let's dive into the ones you've been hearing about. The most common peptides right now:

The Weight Loss Heavy Hitters

1. Semaglutide (“Sema”)
1. Brands: Ozempic, Wegovy
2. What it does: Kills food noise, slows digestion, reduces appetite
3. FDA status: Approved
4. Vibe: Reliable, steady fat loss

       2. Tirzepatide (“Tirz”)

1. 1. Brands: Mounjaro, Zepbound
   2. What it does: Even stronger appetite + blood sugar contro;
   3. FDA status: Approved
   4. Vibe: Faster, often more aggressive results than Sema
   5. Bonus: Less side affects than first-gen GLP-1s

       3. Retatrutide (“Reta”)

1. 1. What it does: Next-gen fat loss (triple hormone action)
   2. FDA status: Not approved (still in trials)
   3. Vibe: The “everyone’s talking about it” peptide—but still experimental

The “Tone, Sleep, and Recovery” Girls

1. Sermorelin (“Sermo”)
1. Type: Growth hormone–releasing peptide
2. What it does: Helps your body produce more natural GH
3. FDA status: Prescription (regulated use)
4. Why women like it: Better sleep, subtle tone, recovery

       2. CJC-1295 + Ipamorelin (“CJC/Ipam”)

1. 1. What it does: Stronger GH signaling combo
   2. FDA status: Not FDA-approved
   3. Why women use it: Body recomposition without stimulants
   4. Vibe: “Lean, toned, sleeping better”

The Healing Stack

1. BPC-157 (“BPC”)
1. What it does: Supports gut + tissue healing
2. FDA status: Not approved
3. Used for: Bloating, injuries, inflammation

       2. TB-500 (“TB”)

1. 1. What it does: Cellular repair + inflammation support
   2. FDA status: Not approved
   3. Usually paired with: BPC
   4. Vibe: Recovery girl era

The Fat Loss Add Ons (Less Hype, More Nuance)

1. AOD-9604 (“AOD”)
1. What it does: Targets fat metabolism
2. FDA status: Not approved
3. Reality: Much weaker than GLP-1s

       2. GHK-Cu (“Copper peptide”)

1. 1. What it does: Skin repair, collagen, hair growth
   2. FDA status: Not approved (injectable), common in skincare
   3. Vibe: Glowy skin, thicker hair, quiet luxury energy

The Longevity + Sleep One Everyone Whispers About

1. Epitalon (“Epi”)
1. What it does: Supports sleep cycles + aging pathways
2. FDA status: Not approved
3. Vibe: Subtle, long-game, nervous system support

What About NAD+?

NAD+ is not a peptide, it’s a coenzyme (think: cellular energy support). It often gets lumped into this world, but it works differently.

Who actually prescribes peptides?

Here’s where it matters:

• Functional medicine doctors
• Nurse practitioners / physician assistants
• Medical weight loss clinics
• Hormone optimization clinics

Gray area (be careful):

• “Wellness clinics” without real medical oversight
• Online peptide shops labeled “research use only”
• People with no medical background
• A lot of peptides are currently sourced directly from China manufacturers and sold third party or “black-market”

If it sounds like:

“no prescription needed”…that’s your cue to pause.

 

FDA approval: what’s real vs hype

Let’s simplify:

FDA-approved (real medical use):

• Semaglutide (Ozempic, Wegovy)
• Tirzepatide (Mounjaro, Zepbound)

Prescription but niche/limited:

• Sermorelin

Not FDA-approved (most of the rest):

• CJC-1295 / Ipamorelin
• BPC-157
• TB-500
• AOD-9604
• Epitalon
• Retatrutide (still in trials)

Translation: A lot of what you’re seeing is early-stage, off-label, or experimental. Big sister advice (read this before you do anything)

• Start with your basics first
  Sleep, protein, stress, movement → still do more than any peptide
• GLP-1s are powerful—but not casual
  They change how you eat, not just how you look
• More peptides ≠ better results
  Stacking everything is how people burn out their system
• If it sounds extreme, it probably is
  Especially anything promising “rapid fat loss + muscle gain + no downside”

The simplest way to think about all of this:

• Want to eat less? → GLP-1s
• Want to recover + tone? → GH peptides
• Want to heal? → BPC + TB
• Want better sleep + longevity? → Epitalon
• Want glow-up energy? → Copper peptides

Peptides aren’t magic. They’re tools. And like any tool, they work best when your foundation is solid. If you’re thinking about them, the goal isn’t to chase trends. It’s to understand what your body actually needs, and go from there.