Ipamorelin is a selective GH-releasing peptide. It nudges your pituitary to release your own growth hormone in natural pulses, usually with less cortisol and prolactin noise than older secretagogues. Clean signal. Your body still does the work.
Retatrutide fun fact: it activates three receptors at once (GLP-1, GIP, and glucagon). In its phase 2 trial, people on the top dose lost about 24% of body weight at 48 weeks. Triple agonists are the next chapter for metabolic peptides.
Peptide spotlight: Cagrilintide. It's a long-acting amylin analog, mimicking a hormone your pancreas releases alongside insulin to signal fullness and slow digestion. Paired with semaglutide in CagriSema trials, it's showing real promise for metabolic health.
KPV is a tiny 3-amino-acid fragment of alpha-MSH, and researchers are excited about it. Early studies show it calming inflammatory signaling in gut and skin models. Small peptide, big potential. Follow for more peptide science you can actually use.
Glutathione is a peptide of just 3 amino acids that your cells make every day. Often called the master antioxidant, it helps neutralize free radicals and supports liver detox. Levels dip with age and stress, which is why researchers keep studying it.
Fun fact: semaglutide is a peptide. It mimics GLP-1, a hormone your gut releases after meals to signal fullness and help steady blood sugar. Researchers are studying GLP-1 peptides for heart, liver, and even brain health. One of the biggest peptide stories of the decade.
Oxytocin is a tiny 9 amino acid peptide your brain releases during hugs, bonding, and childbirth. Researchers are exploring its role in social connection, stress response, and even appetite. Small molecule, big impact on how we connect.
Tesamorelin is one of the few peptides with an FDA approval behind it. It's a GHRH analog that tells your pituitary to release its own growth hormone in natural pulses, and research links it to less visceral belly fat. Your body does the work. It just gets a better signal.
MOTS-c is a peptide your mitochondria make. It's called an exercise mimetic because it switches on AMPK, the same energy sensor a workout flips. Early research ties it to better insulin sensitivity and metabolic flexibility. Levels drop with age, so it's one to watch.
Humanin is a tiny peptide your mitochondria make on their own. Researchers love it because it helps cells handle stress, supports insulin sensitivity, and shows real neuroprotective promise. Levels drop as we age, which is exactly why longevity labs keep digging into it.
Sermorelin 101: it's a GHRH analog, so it signals your pituitary to release its own growth hormone in natural pulses instead of replacing it. That's why people like it for sleep, recovery, and body composition support with age. Working with your body, not around it.
PT-141 (bremelanotide) works in the brain, not the blood vessels. It activates melanocortin receptors linked to desire and arousal, which is why it's studied for low libido in men and women. One form is already FDA approved for premenopausal women with HSDD. It starts upstairs.
Thymosin Alpha-1 is a 28 amino acid peptide first found in the thymus. It helps T cells mature and supports a balanced immune response. Decades of research, approved in 30+ countries, and still one of the most interesting immune peptides out there.
Selank 101. It's a synthetic analog of tuftsin, a short peptide your body already makes. Research has explored it for calm focus, stress resilience, and mood support without the heavy sedation people expect. One of the most interesting peptides in the nootropic space.
SS-31 (elamipretide) is a mitochondria-targeted peptide. It binds cardiolipin inside mitochondria, helping the cell's energy machinery stay organized and efficient. It is being studied for mitochondrial disease, heart health, and healthy aging. Small peptide, big energy story.
Epitalon spotlight: a tiny 4-amino-acid peptide modeled on epithalamin, a pineal gland extract. Lab studies link it to telomerase activity and healthier melatonin rhythms, which is why longevity researchers keep coming back to it. One of the most exciting peptides to watch.
Kisspeptin is a fascinating signaling peptide. It sits at the top of the reproductive axis, cueing the hypothalamus to release GnRH, which then signals LH and FSH. Why researchers love it: it works with your body's own hormone signaling instead of replacing it.
Pinealon is a short brain peptide people look at for sleep quality and clearer mornings after rough nights.
It shows up in conversations about neuroprotection and recovery when stress has been frying focus all day.