Amstalden. M M; Cardoso. R C RC; Alves. B R C BR; Williams. G L GL
The study shows that how much and what young cows eat changes brain signals (like kisspeptin, NPY, and α‑MSH) that control the start of puberty. Faster weight gain speeds up puberty, while restricted growth delays it. These brain pathways adapt structurally and genetically to nutrition, suggesting diet can program reproductive timing.
The review shows that chemicals like BPA, PCBs and the plant estrogen genistein can mess up the kisspeptin system, which is a key hormone pathway for puberty, fertility and metabolism. These disruptions depend on the brain region, sex, and the specific chemical, and they can cause early puberty in girls, irregular cycles, and even affect mood and metabolism.
Jayasena. Channa N CN; Abbara. Ali A; Comninos. Alexander N AN; Nijher. Gurjinder M K GM; Christopou...
A single shot of kisspeptin‑54 can safely cause the hormone surge that matures eggs in women undergoing IVF, with more mature eggs seen at higher doses and about a quarter of treated women achieving pregnancy.
George. Jyothis T JT; Veldhuis. Johannes D JD; Tena-Sempere. Manuel M; Millar. Robert P RP; Anderson...
In a tiny study, giving men with type‑2 diabetes and low testosterone a short burst of the hormone‑like peptide kisspeptin‑10 raised their luteinising hormone (LH) and, after a longer infusion, also lifted their testosterone levels. The effect was seen both in healthy volunteers and the diabetic participants, showing kisspeptin can kick‑start the body’s own testosterone production, but the work was done with IV doses and involved only a handful of people.
Ramaswamy. Suresh S; Seminara. Stephanie B SB; Plant. Tony M TM
In young male monkeys without testes, constantly giving kisspeptin-10 made the kisspeptin receptor stop working and also blocked the hormone‑releasing effect of a related peptide (NKB). Stopping the kisspeptin infusion let the system recover. Doing the opposite—continuously giving the NKB‑mimic—did not stop kisspeptin from triggering hormone release. This shows NKB works before kisspeptin in the chain that tells the brain to release reproductive hormones.
Jayasena. C N CN; Comninos. A N AN; Nijher. G M K GM; Abbara. A A; De Silva. A A; Veldhuis. J D JD;...
A short, one‑week course of twice‑daily kisspeptin‑54 injections given during the middle of the menstrual cycle did not stop periods in healthy women. Instead, it made the overall cycle a little shorter and caused the hormone surge that triggers ovulation to happen a couple of days earlier.
Bowe. James E JE; Foot. Victoria L VL; Amiel. Stephanie A SA; Huang. Gao Cai GC; Lamb. Morgan W MW;...
The study found that short kisspeptin peptides (kisspeptin‑10 and kisspeptin‑13) quickly boost insulin release from isolated pancreas cells in mice, pigs, rats and humans when glucose is high. The effect is fast, reversible, and works across species, suggesting the peptides act directly on insulin‑producing cells. Earlier reports of inhibition may have been due to different lab methods.
In male monkeys, giving the hormone‑boosting peptide kisspeptin‑10 raised testosterone just as well whether the animals had normal blood sugar or were made low on sugar by insulin. Other stimulants that rely on excitatory amino acids worked less well when blood sugar was low, but kisspeptin’s effect stayed strong.
Giving a short burst of kisspeptin‑10 (a hormone that normally helps control reproduction) to adult male rhesus monkeys didn’t change their normal insulin levels, but it made their pancreas release more insulin when glucose was given, whether the animals were fed or fasting. This hints that kisspeptin might boost the body’s insulin response to sugar.
Ansel. L L; Bentsen. A H AH; Ancel. C C; Bolborea. M M; Klosen. P P; Mikkelsen. J D JD; Simonneaux....
Giving kisspeptin (a hormone that tells the brain to release reproductive signals) as a quick injection into the body can wake up the reproductive system in hamsters that have gone dormant because of short winter days, raising testosterone levels. However, a slow‑release method didn’t work, so timing and dosing matter. The findings hint that short, repeated doses might be needed if you ever try kisspeptin to boost hormones, but it’s still an animal study and not proven for people.
Roa. J J; Garcia-Galiano. D D; Varela. L L; Sánchez-Garrido. M A MA; Pineda. R R; Castellano. J...
The study shows that the brain’s mTOR pathway helps start puberty by controlling the kisspeptin system. Turning mTOR on with the amino acid leucine boosts LH hormone release, while blocking mTOR with rapamycin delays puberty and lowers reproductive hormones in young female rats. Even when mTOR is blocked, the animals still respond to kisspeptin-10, meaning the basic GnRH system stays functional.
Chan. Yee-Ming YM; Butler. James P JP; Sidhoum. Valerie F VF; Pinnell. Nancy E NE; Seminara. Stephan...
Giving kisspeptin to women triggers a quick rise in LH (the hormone that tells the ovaries to release eggs) but only when they are in the mid‑luteal or pre‑ovulatory part of their cycle. In the early follicular phase (right after the period starts) the response is weak and giving more kisspeptin doesn’t help. This means the body’s own kisspeptin levels are already high early in the cycle, so extra kisspeptin doesn’t add much.
Kaur. Kulvinder Kochar KK; Allahbadia. Gautam G; Singh. Mandeep M
Kisspeptin-10 is a hormone that helps control the brain's reproductive center. It plays a big role in starting puberty, regulating fertility, and linking metabolism to reproductive signals. Researchers think that drugs that mimic or block kisspeptin could someday treat delayed puberty, certain forms of infertility, hormone‑related amenorrhea, and maybe even help with some cancers or eating disorders, but real‑world dosing and safety are still being worked out.
The study shows that chemicals like BPA and other synthetic hormones can mess up the brain’s kisspeptin system during early development, which may delay puberty and affect fertility. Giving extra kisspeptin in animals can fix some of these problems, but we don’t yet know if it works in people.
Mikkelsen. Jens D JD; Bentsen. Agnete H AH; Ansel. Laura L; Simonneaux. Valerie V; Juul. Anders A
In male mice, giving kisspeptin peptides (both short 10‑amino‑acid and longer versions) under the skin quickly raises blood testosterone, and the human versions work just as well as the mouse ones. Longer peptides act a bit slower but keep testosterone up longer, and the effect depends on the body’s GnRH system, not directly on the brain cells that make GnRH.
The paper explains that the brain releases the hormone GnRH in two ways – a big surge for ovulation and regular pulses that keep the reproductive system running. These pulses are fine‑tuned by hormones like estrogen and by things like light, food, and stress. The authors argue that a group of brain cells that make kisspeptin, especially in the arcuate nucleus, are the main drivers of these GnRH pulses.
Sébert. M-E ME; Lomet. D D; Saïd. S Ben SB; Monget. P P; Briant. C C; Scaramuzzi. R J RJ;...
Giving sheep a steady IV dose of kisspeptin-10 for many hours caused a big rise in the hormone LH that leads to ovulation, but only when the treatment also raised estrogen levels. The longer the kisspeptin was infused, the more likely the animals were to have this LH surge.
Morelli. Annamaria A; Marini. Mirca M; Mancina. Rosa R; Luconi. Michaela M; Vignozzi. Linda L; Fibbi...
The study shows that kisspeptin can make GnRH‑releasing cells fire more hormone, while estrogen dampens, and androgens and leptin boost the kisspeptin system. In simple terms, sex hormones and the fat‑derived hormone leptin work together to turn on a key pathway that starts puberty, but the work was done in fetal brain cells, not in living adults.
Kisspeptin is a naturally occurring peptide that, when given to healthy people, quickly raises the hormones that tell the testes and ovaries to produce sex hormones, without obvious side effects. This shows it could be a safe way to tweak the reproductive hormone system, which influences things like muscle growth, mood, and metabolism, but the study doesn’t give a clear dosing plan for DIY use.
Leptin, a hormone that tells the brain about energy stores, also helps start puberty and keep the reproductive system working. New animal and early human studies suggest that leptin works through kisspeptin‑producing neurons (KiSS1) to control fertility, and that giving leptin can fix reproductive problems caused by low leptin levels.