What is Sermorelin?
Sermorelin is a peptide, a short chain of 29 amino acids. It's a copy of the active part of GHRH, the natural hormone your brain uses to tell your pituitary gland to release growth hormone (GH).
That's the key difference from HGH. Sermorelin doesn't add growth hormone to your body. It reminds your body to make more of its own, the way it did when you were younger.
How it works in your body
Sermorelin works in three steps. Watch them play out:
- 1
Signal
Sermorelin tells your pituitary gland it's time to make growth hormone.
- 2
Release
Your pituitary releases its own GH in natural pulses, mostly while you sleep.
- 3
Restore
That GH helps your body repair, recover, and rebuild overnight.
Sleep. GH and deep sleep go hand in hand. Supporting one tends to support the other.
Recovery. GH helps repair muscle and tissue after training and everyday wear.
Body composition. GH helps your body hold on to lean muscle and use fat for fuel.
Why growth hormone drops
Growth hormone peaks in your teens and twenties, then drops steadily every decade after.
Less growth hormone every decade
After your 20s, your body releases less GH each decade. It shows up as lighter sleep, slower recovery, and less muscle.
Illustrative of the age-related decline described in published research.
A few things drive the decline:
Age
GH output falls steadily after your 20s. Research suggests about 14% less per decade.
Less deep sleep
Most GH is released in deep sleep, and deep sleep shrinks as you age.
Body fat
More body fat, especially around the middle, is linked to lower GH release.
Less intense exercise
Hard training is one of the strongest natural triggers for GH.
Less growth hormone doesn't feel like a hormone problem. It feels like lighter sleep, slower recovery, and a body that doesn't respond like it used to.
Signs your GH may be low
Lower GH builds slowly, so the signs are easy to put down to age. Tap any that sound like you.
Tap the ones that apply.We'll tell you what it might mean.
Start nowThese signs have many possible causes and aren't a diagnosis. Only a licensed provider can evaluate you.
Ways to support growth hormone
There are four main ways to support growth hormone. They're not all equal.
Deep sleep, hard exercise, and a healthy body weight are your body's own GH boosters.
- Free, and good for everything
- Sleep and training both trigger GH
- A gentle effect on its own
- Harder to maintain with age
Best for: Everyone, as a foundation
Supplements marketed to raise growth hormone.
- Easy to buy
- Evidence is weak for most products
- Quality varies
- No medical oversight
Best for: People who want to experiment cheaply
A peptide, prescribed by a licensed provider, that signals your pituitary to release more of your own GH.
- Works with your natural rhythm
- Your body stays in control of how much it releases
- Provider-prescribed, shipped to you
- Requires a prescription
- A small weekly injection
Best for: People who want better sleep and recovery, naturally
Injecting growth hormone directly.
- Strong, direct effect
- Replaces your own production
- Tightly restricted and expensive
- Higher risk of side effects
Best for: Diagnosed GH deficiency, under a specialist
How you take it
Sermorelin is a small subcutaneous injection you take at home, once a week.
Once a week
One quick injection. Many people take it in the evening, when GH naturally peaks.
Tiny needle
A quick subcutaneous injection that takes seconds.
2 mg/mL · 5 mL vial
Your provider sets your exact dose.
What to expect
Sermorelin works with your body, so the benefits build over weeks and months rather than overnight.
- Day 1
Take a 5-minute online assessment
A licensed provider reviews it. No appointment, no waiting room.
- Week 1
Your Sermorelin arrives
It ships straight to your door. Start your weekly routine.
- Weeks 2–4
Sleep often improves first
Many people notice deeper, more restful sleep early on.
- Weeks 4–8
Energy and recovery build
More energy during the day and faster recovery from training.
- Months 3–6
The long game
Changes in body composition, skin, and overall vitality build with consistency.
Individual results vary. Your licensed provider will help you set realistic expectations.
Safety & side effects
Because Sermorelin works through your body's own feedback system, your pituitary stays in control of how much GH it releases. Most side effects are mild.
Common and mild
- Redness or swelling where you inject
- Flushing or warmth
- Headache
- Mild dizziness
Talk to your provider first if you
- Are pregnant or breastfeeding
- Have, or have had, cancer
- Have a thyroid condition
- Take prescription medications
Every Tides prescription starts with a licensed provider reviewing your health history, and they stay with you throughout your protocol.
Sermorelin and NAD+
Sermorelin and NAD+ work on different levels, which is why they pair so well. Sermorelin supports the hormone signal that drives sleep and recovery. NAD+ fuels energy and repair inside every cell.
Quick answers
Further reading
- Walker RF. Sermorelin: a better approach to management of adult-onset growth hormone insufficiency? Clinical Interventions in Aging, 2006.
- Prakash A, Goa KL. Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic growth hormone deficiency. BioDrugs, 1999.
- Iranmanesh A, Lizarralde G, Veldhuis JD. Age and relative adiposity are specific negative determinants of the frequency and amplitude of growth hormone secretory bursts in healthy men. Journal of Clinical Endocrinology & Metabolism, 1991.
- Van Cauter E, Leproult R, Plat L. Age-related changes in slow wave sleep and REM sleep and relationship with growth hormone and cortisol levels in healthy men. JAMA, 2000.
This guide is for education only and isn't medical advice. Always talk to a licensed healthcare provider before starting any treatment.