Dr. Explains Peptide Stacks Used for Muscle Growth
A physician explains how growth hormone releasing peptides, common stacks, and two higher-risk compounds are discussed for muscle building, and what she says about the human data and side effects.
With Dr. Ashley Froese (physician who says she runs a direct primary care clinic in Mesa, Arizona)
Key moments
Tap a moment to play the video from there.
- 0:00Framing and what the video coversFroese says the video is research discussion, not medical advice, and previews the stacks and risks she will cover.
- 1:33Growth hormone and IGF-1 explainedShe uses a DJ analogy for the pituitary and says growth hormone pulses prompt the liver to make IGF-1, which she credits with building muscle.
- 2:34Releasing hormone peptides by half-lifeShe compares sermorelin, Mod GRF, CJC-1295 with DAC and tesamorelin, from shortest to longest activity.
- 5:39How people choose between themShe says people use CJC-1295 for muscle, sermorelin for a milder start, and tesamorelin for gains and leaning out, and that tesamorelin may cause more side effects.
- 6:10Why ipamorelin is stackedShe says releasing hormone peptides set the pulses and ipamorelin raises their amplitude, giving synergy.
- 7:43Other releasing peptides comparedShe says GHRP-2, GHRP-6 and hexarelin act similarly but also raise cortisol, prolactin and hunger, so she calls ipamorelin the cleaner amplifier.
- 8:10IGF-1 LR3 and follistatinShe describes IGF-1 LR3 as a longer-acting IGF-1 version and follistatin as a myostatin brake release, listing risks and inconsistent results.
- 10:17Human data and side effectsShe says sermorelin, CJC-1295, tesamorelin and ipamorelin have much human data, while IGF-1 LR3 and follistatin have little.
- 11:48Cancer caution and closingShe points to her separate video on cancer and says peptides are amplifiers of biology, not magic.
What the video says
Dr. Ashley Froese presents this as an explainer on the research behind peptides popular for muscle building. She says it is not medical advice and that she gives no protocols and does not encourage use. She frames her role as knowing more about these compounds than online gym influencers, since some patients ask about them.
She first sets out the biology as she describes it. In her telling, the pituitary releases pulses of growth hormone, which signal the liver to make IGF-1, and she credits IGF-1 with building muscle, repairing tissue and raising strength. She says these pulses fade with age and that peptides do not replace growth hormone but prompt the pituitary to release it. She then ranks the growth hormone releasing hormone peptides by half-life: sermorelin (shortest), CJC-1295 without DAC (also called Mod GRF), CJC-1295 with DAC (activity of about six to eight days), and tesamorelin (effects of almost 24 hours). She notes tesamorelin is FDA approved for HIV-associated lipodystrophy and says it has become popular as a visceral fat burner.
Next she explains why these are stacked with ipamorelin. She says the releasing hormone peptides drive the pulses, while ipamorelin increases their amplitude and quiets somatostatin. She says it does this without raising cortisol and prolactin, which she says GHRP-2, GHRP-6 and hexarelin also do, along with hunger.
She then covers two compounds she calls high risk, IGF-1 LR3 and follistatin. She lists benefits users claim for IGF-1 LR3 and risks including lower blood sugar, insulin resistance, anxiety and organ growth. She says follistatin releases the brake on muscle growth but gives inconsistent results and hard dosing. She closes by saying most of the others have substantial human data, these two have little, and tesamorelin has the most documented side effects. She also tells viewers with active cancer or tumors, or a strong tendency toward them, not to stimulate growth hormone pathways.
On each compound
Sermorelin3:04
Froese describes sermorelin as the shortest-acting growth hormone releasing hormone peptide, broken down by DPP4. She calls it mild and says it is prescribable through a compounding pharmacy.
See how your DNA reads SermorelinCJC-12953:35
She says Mod GRF is CJC-1295 without DAC, with a half-life of about 30 minutes. She says the version with DAC binds albumin and acts for about six to eight days.
See how your DNA reads CJC-1295Tesamorelin4:36
She says tesamorelin is a modified full 44 amino acid sequence, FDA approved for HIV-associated lipodystrophy. She says it has the most documented side effects, including water retention, joint pain and carpal tunnel.
See how your DNA reads TesamorelinIpamorelin6:42
Froese says ipamorelin amplifies growth hormone pulses and lowers somatostatin. She says it does so without raising cortisol and prolactin, making it the preferred stack partner.
See how your DNA reads IpamorelinGHRP-27:43
She says GHRP-2 does much the same as ipamorelin to varying degrees, while also raising cortisol, prolactin and hunger.
See how your DNA reads GHRP-2GHRP-67:43
She groups GHRP-6 with the other growth hormone releasing peptides that she says bump up cortisol, prolactin and hunger.
See how your DNA reads GHRP-6Hexarelin7:43
She names hexarelin among peptides that act like ipamorelin but, in her account, also raise cortisol, prolactin and hunger.
See how your DNA reads HexarelinIGF-1 LR38:40
She describes IGF-1 LR3 as a longer-acting, more potent synthetic IGF-1 that bypasses growth hormone. She lists lower blood sugar, insulin resistance, anxiety and organ growth as risks, and says human data is limited.
See how your DNA reads IGF-1 LR3Follistatin-3449:34
She discusses follistatin as a myostatin brake releaser, saying it may add size without matching strength. She calls it hard to dose, with inconsistent results and little human data.
See how your DNA reads Follistatin-344“peptides aren't magic, but they're very cool.”
What this video doesn’t settle
- The video gives no study citations or effect sizes for muscle gain, so claims about strength and recovery rest on the speaker's summary.
- Froese says follistatin and IGF-1 LR3 have little human data, so the video cannot say how they perform or how safe they are in people.
- She mentions a separate video on peptides and cancer but does not present that evidence here.
Questions this video answers
Why is ipamorelin stacked with CJC-1295 or tesamorelin?
Froese says releasing hormone peptides like CJC-1295 and tesamorelin drive growth hormone pulses, while ipamorelin raises their amplitude. She calls the combination synergistic and says ipamorelin does it without raising cortisol and prolactin.
What is the difference between sermorelin, CJC-1295 and tesamorelin?
According to Froese, they differ mainly in how long they last. She puts sermorelin as shortest, Mod GRF at about 30 minutes, CJC-1295 with DAC at about six to eight days, and tesamorelin effects at almost 24 hours.
What risks does Dr. Froese attach to IGF-1 LR3?
She lists lower blood sugar, increased insulin resistance, some anxiety, possible visceral organ growth and a turtle shell look in very muscular people. She also says there is little human data on it.
Which muscle peptides does she say have the most human data?
She says sermorelin, CJC-1295, tesamorelin, ipamorelin and most GHRP peptides have a lot of human data. She says IGF-1 LR3 and follistatin do not.
Does she recommend peptides for muscle building?
No. Froese says the video is not medical advice, that she gives no protocols and does not encourage use. She says her aim is to help people understand them and be safer if they use them anyway.
Video by This Is Not Covered - Dr. Ashley Froese on YouTube, embedded as published. The summary is written by PeptidesDNA from the video; every claim in it is the speaker’s. Not affiliated with or endorsed by the creator. Not medical advice.
