Seven questions answered on one page

The answers

What is a peptide?

A peptide is a chain of amino acid residues joined by peptide bonds, written as a string of one-letter codes from the N-terminus to the C-terminus. GHK, for example, is glycine, histidine and lysine. Read residues, the letters peptides are spelled with.

Are peptides legal in the US?

Peptide is a chemistry word, not a legal category. Insulin and semaglutide are approved drugs, legal on a valid prescription; many compounds sold online as peptides are unapproved drugs, and selling them for human use is unlawful. Read the legal status guide.

What is bac water?

Bacteriostatic water is sterile water for injection with benzyl alcohol added as a preservative, sold in multi-dose vials. The preservative slows bacterial growth; it cannot vouch for whatever is dissolved in it. Read what bac water is.

Is BPC-157 an approved drug?

No. No regulator has approved BPC-157 for any use, and every number found online comes from rodent studies, vendor sheets or forum posts rather than an established human dose. Read BPC-157 in recovery research.

What is the KLOW or GLOW blend?

Both are seller names. KLOW is described as GHK-Cu, KPV, BPC-157 and TB-500; GLOW as GHK-Cu, BPC-157 and TB-500. No clinical trial has tested either combination. Read KLOW, ingredient by ingredient and what the 70 in GLOW means.

Are SARMs peptides?

No. SARMs such as ostarine and LGD-4033 are small nonsteroidal molecules built from rings, with no chain and no sequence. A peptide is a string of residues. Read SARMs vs peptides.

Does Peptide Studio give dosing advice?

No. Articles report what studies used and what approved labels state, and say plainly when no human dose has been established. They give no personal amounts, schedules or injection sites, and never name sellers. See the editorial policy.

Last updated 2 Nov 2026. See also the editorial policy, privacy policy and about page.