Sermorelin & Tesamorelin
Two prescription GHRH peptides that signal the pituitary to release the body’s own growth hormone. Evaluated with labs, prescribed individually, and monitored on a set schedule.
Growth Hormone Declines With Age
Growth hormone secretion peaks in adolescence and falls steadily through adult life. The decline is gradual and normal — but for some people it coincides with changes that are hard to ignore.
Directional illustration. Individual levels vary and are determined by laboratory testing.
What people notice
Poor sleep quality, slower recovery from training, changes in body composition despite consistent effort, and lower energy through the day.
Why it matters
Growth hormone signaling is involved in tissue repair, lean mass maintenance, fat distribution, and sleep architecture — which is why changes tend to show up across several areas at once rather than in isolation.
See if this is right for you
Tell us what you’re working on and we’ll follow up within one business day to help you decide whether sermorelin or tesamorelin makes sense.
- Appointments within the week
- In-office in Farmingdale or telehealth across New York
- Sourced from licensed, state-regulated pharmacies
- No insurance delays
How Sermorelin and Tesamorelin Work
Sermorelin and tesamorelin are GHRH analogs — synthetic versions of growth hormone-releasing hormone, the signal your hypothalamus uses to tell the pituitary gland to release growth hormone. Rather than introducing growth hormone directly, they prompt the pituitary to release its own, in the pulsatile pattern the body normally uses.
Where IGF-1 fits
Growth hormone itself is difficult to measure. It’s released in short bursts, mostly overnight, so a single blood draw says very little about your actual levels.
Instead, growth hormone travels to the liver, which responds by producing insulin-like growth factor 1 — IGF-1. Because IGF-1 stays relatively stable in circulation, it serves as the practical marker of growth hormone activity. It’s the number your provider follows to understand how you’re responding, and it’s tracked alongside fasting glucose and A1c throughout treatment.
Supports cognitive function, focus, and mental clarity
Improves elasticity, hydration, and collagen
Promotes lean muscle development and strength
Stimulates cell turnover and tissue renewal
Supports healthy fat burning and metabolism
Enhances bone density and skeletal strength
Supports faster recovery and injury healing
Promotes energy, wellness, and long-term health
Illustrative summary of IGF-1’s role in normal physiology. Not a representation of treatment outcomes. Individual results vary.
What Growth Hormone Peptides May Support
Growth hormone influences how the body repairs tissue, builds lean mass, manages fat, and consolidates sleep. Those functions decline gradually with age, and GHRH analogs are studied for whether restoring more youthful signaling affects them.
The areas below are where the research has concentrated. What’s realistic for you depends on your labs, your history, and what your provider finds — that’s a conversation, not a list.
Tissue Repair and Recovery
Growth hormone and IGF-1 participate in collagen synthesis and connective tissue turnover — the processes behind how tendons, ligaments, and muscle recover from load. Research in this area looks at recovery from physical stress and the maintenance of connective tissue with age. It’s one of the more consistent themes in the GHRH analog literature.
Sleep Architecture
The largest natural pulse of growth hormone occurs during slow-wave sleep, in the first few hours after you go to bed. That relationship runs both ways: deep sleep drives GH release, and GH signaling appears to influence sleep structure in return. It’s also why these peptides are dosed at night rather than in the morning.
Body Composition
Growth hormone signaling affects how the body partitions fat and maintains lean tissue. Tesamorelin specifically has been studied for its effect on visceral adipose tissue — the deeper abdominal fat that sits around the organs rather than under the skin. Research on body composition generally tracks lean mass alongside fat distribution rather than weight alone.
Metabolic Markers
IGF-1 signaling interacts with glucose metabolism, which is why fasting glucose and A1c are monitored alongside IGF-1 throughout treatment rather than checked once at baseline. Studies in this area track metabolic markers together with body composition, since the two move in relation to each other.
Sermorelin and Tesamorelin: How They Differ
Both are GHRH analogs. Both work by prompting the pituitary to release growth hormone rather than supplying it directly. What separates them is molecular structure, how long they stay active, and where the research has concentrated.
Sermorelin
Tesamorelin
GRF(1-29) — the first 29 amino acids of GHRH, the segment that binds the receptor.
A stabilized GHRH analog, modified to resist rapid enzymatic breakdown.
Short half-life, roughly 10 to 20 minutes, producing a brief pulse rather than sustained elevation.
Longer duration of action, with a more sustained effect on GH release.
General growth hormone support, sleep quality, and recovery.
Visceral fat and body composition specifically.
- Improves sleep quality
- Increases energy and recovery
- Supports lean muscle and fat loss
- Improves skin, hair, and overall wellness
- Reduces abdominal (visceral) fat
- Improves lipid profile
- May improve insulin sensitivity
Not sure which applies to you? That’s what the consultation is for.
What We Monitor
Baseline labs come before anything is prescribed. From there, IGF-1 is the primary marker — it’s the stable downstream signal of growth hormone activity, and it’s what tells your provider how your body is responding.
Fasting glucose and A1c are tracked alongside it, because growth hormone signaling interacts with glucose metabolism. Follow-up labs are drawn on a set schedule, and your protocol is adjusted from what those numbers show rather than from how long you’ve been on it.
Is This Worth Discussing?
Worth a conversation if:
- You're an adult with symptoms that could reflect declining growth hormone signaling — sleep quality, recovery, body composition
- You've already addressed the fundamentals: sleep, training, nutrition, and existing hormone levels
- You want your response tracked with labs rather than by feel
- You're comfortable with a nightly self-administered injection
Likely not the right fit if:
- You have an active malignancy, or a history of one, without oncology clearance
- You're looking for a shortcut around sleep, training, or diet
- You want guaranteed results on a fixed timeline
- You're pregnant or breastfeeding
Questions About Sermorelin and Tesamorelin
How are sermorelin and tesamorelin different from HGH?
HGH is growth hormone itself, given directly. Sermorelin and tesamorelin are GHRH analogs — they signal your pituitary to release its own. The practical difference is that your body's own feedback mechanisms stay in the loop, so release follows a natural pulsatile pattern rather than a sustained level.
What's the difference between sermorelin and tesamorelin?
Both are GHRH analogs. Sermorelin is GRF(1-29), with a short half-life of roughly 10 to 20 minutes. Tesamorelin is stabilized against enzymatic breakdown and acts longer. Tesamorelin is available as an FDA-approved product; sermorelin is compounded. Which one fits is determined at consultation.
Are sermorelin and tesamorelin safe?
They're prescription therapies with a known side effect profile, and appropriateness is determined individually. Before anything is prescribed, your provider reviews your history — including any cancer history, since growth hormone and IGF-1 signaling is relevant there. Labs are drawn at baseline and on a set schedule afterward, including IGF-1, fasting glucose, and A1c. Anyone telling you a prescription therapy is simply safe isn't giving you a complete answer.
When will I see results?
That varies, and anyone quoting you a fixed timeline is guessing. What's measurable is your lab work — IGF-1 response shows up on follow-up labs, and your protocol is adjusted from those numbers.
Are there side effects?
The most common are injection site reactions. Others reported with GHRH analogs include fluid retention, joint discomfort, and changes in glucose metabolism, which is part of why fasting glucose and A1c are monitored. Your provider reviews the full profile with you before you start.
Do I have to inject every night?
Yes — these are subcutaneous injections given nightly before bed, self-administered at home with a fine insulin syringe. Nightly timing reflects the body's natural pattern of growth hormone release during deep sleep.
Can I take these with TRT?
They're different pathways and are sometimes used together. Whether that makes sense depends on your labs and what you're addressing. If you're already on TRT through us or another provider, bring your recent labs to the consultation.
Are these FDA-approved?
Tesamorelin is available as an FDA-approved product, approved for reducing excess visceral abdominal fat in adults with HIV-associated lipodystrophy. Sermorelin is not currently an FDA-approved product and is available as a compounded preparation. Compounded medications are prescribed and dispensed under state pharmacy law rather than FDA product approval.
How long do I need to take it?
There's no fixed course. Duration depends on your response, your labs, and your goals, and it's revisited at each follow-up.
Can I do everything via telehealth?
Follow-up visits can be conducted by telehealth anywhere in New York State. Lab work has to be done in person, and initial evaluation depends on your situation.
Peptide therapies are prescription treatments provided following a clinical evaluation and provider confirmation of eligibility. Individual suitability is determined at consultation. This page is for informational purposes only and does not constitute medical advice. Clinical services are provided by Santiago Acute Care NP Services PLLC. Cash-pay only.