Bimagrumab is a monoclonal antibody that blocks the activin type II receptor, a signal that normally limits muscle. In plain terms: by releasing that brake it builds muscle while the body sheds fat, an unusual combination being studied with GLP-1 drugs. It is still experimental.
This is a blend of two growth-hormone signals: a GHRH analog (CJC-1295) that sets a steady base and a GHRP (ipamorelin) that adds a pulse. In plain terms: together they nudge your body to release more of its own growth hormone than either alone, in one shot.
IGF-1 LR3 is a long-acting version of insulin-like growth factor 1, the hormone that growth hormone works through to build tissue. In plain terms: it directly drives muscle cells to grow and repair and stays active for hours, but it also drops blood sugar hard.
IGF-1 DES is a short, extra-potent version of insulin-like growth factor 1 that acts locally. In plain terms: injected into a specific muscle, it drives growth right there, then clears quickly.
Follistatin is a protein that binds and blocks myostatin, the body's natural brake on muscle growth. In plain terms: with the brake released, muscles can grow beyond their normal limit, an effect that is dramatic in animals but experimental in people.
MGF (mechano growth factor) is a variant of IGF-1 that muscles produce locally after intense exercise. In plain terms: it activates the stem cells that rebuild muscle, so it is injected near a worked muscle to speed repair.
PEG-MGF is mechano growth factor with a PEG coating that makes it last far longer in the body. In plain terms: it does the same muscle-repair job as MGF but on a less-frequent schedule.
ACE-031 (ramatercept) is a decoy receptor that soaks up myostatin and activin, the signals that limit muscle. In plain terms: by mopping up those brakes it lets muscle grow, but its development was paused over side effects.
BPC-157 is a synthetic chain of 15 amino acids based on a protective protein found in stomach acid. In plain terms: it seems to speed the body's own repair signals, especially for blood vessels and connective tissue, which is why people use it after injuries, though almost all evidence is from animals.
TB-500 is a synthetic fragment of thymosin beta-4, a natural protein involved in cell repair and movement. In plain terms: it is used to help muscles, tendons, and other tissue heal and to improve flexibility, though most evidence is from animals and most products are the fragment, not the full protein.