Is KLOW Banned in Sports? WADA, NCAA and Drug Tests for the KLOW Blend

KLOW is a 5 mL multi-dose vial containing 50 mg GHK-Cu, 10 mg KPV, 10 mg BPC-157 and 10 mg TB-500, at $259 a month all-in, covering the medication, physician review, refill management and shipping.

BPC-157 and TB-500

The 2026 List places BPC-157 in S0, Non-Approved Substances, naming it explicitly, and USADA confirms it. S2.3 names "Thymosin-ß4 and its derivatives e.g. TB-500" and closes with a catch-all for growth factor modulators "affecting muscle, tendon or ligament protein synthesis/degradation, vascularisation, energy utilization, regenerative capacity or fibre type switching." Both headings read "prohibited at all times." The 2027 List carries the same entries. The detail is in is BPC-157 banned.

GHK-Cu and KPV

Neither is named. WADA's explanatory note to the 2027 List warns that "even if a peptide is not specifically named on the List, utmost caution should be taken as it may still be prohibited." The standalone questions are covered in is GHK-Cu banned in sports and is KPV banned in sports.

KPV is the only difference between KLOW and GLOW. Removing KPV does not remove BPC-157 or TB-500, so GLOW is prohibited for the same reasons; see is GLOW banned in sports. Other blends that share components are no better for a tested athlete.

The differences between the two main repair blends are in KLOW vs GLOW.

S0 and S2 apply in and out of competition. Repair blends tend to be used in rehabilitation blocks and off-season training, which is exactly what out-of-competition testing is designed to reach. There is no window in which KLOW is permitted for a tested athlete.

Published methods exist for KLOW's named components. A 2017 Drug Testing and Analysis paper reported a validated urine method for BPC-157 with a limit of detection of 0.1 ng/mL, stable in urine for at least four days. TB-500 and its metabolites were quantified by high-resolution mass spectrometry in a 2024 Journal of Chromatography B paper. A 2026 paper in The Analyst described a harmonised workflow for peptidic doping agents in blood.

Detection windows for small peptides are generally hours to a few days, but a negative sample can be stored and reanalysed under Code Article 6.6, and Article 17 allows a charge within ten years.

Article 2.1.1 of the World Anti-Doping Code makes it the athlete's personal duty to ensure no prohibited substance enters their body, and a violation does not require intent or fault to be shown. A KLOW prescription from a licensed physician is valid medicine and still a violation in a tested pool.

A therapeutic use exemption requires a diagnosed condition supported by clinical evidence, no enhancement beyond a return to normal health, no reasonable permitted alternative, and a need not caused by earlier prohibited use. USADA's published position is that a TUE for BPC-157 is unlikely to be approved because permitted alternatives exist. A four-peptide repair blend is a harder case still.

The NCAA bans "peptide hormones, growth factors, related substances and mimetics," and its published examples include BPC-157 and TB-500. It states that the school and the student-athlete are both accountable for everything in a banned class. Professional leagues mostly run their own programs, so check your league's policy.

The federal employment panel in 49 CFR 40.85 tests for marijuana metabolites, cocaine metabolite, opiates, semi-synthetic opioids, 6-acetylmorphine, phencyclidine, amphetamines and MDMA. None of KLOW's peptides is on it or structurally similar to anything on it. See do peptides show up on a drug test.

All four components were removed from Category 2 of the FDA's interim 503A list in April 2026. On 23 July 2026 the Pharmacy Compounding Advisory Committee voted 8 to 6, with one abstention in each case, to recommend adding BPC-157, KPV and TB-500 to the 503A Bulks List, against the recommendation of FDA's own reviewers; final determinations are pending. GHK-Cu is scheduled for the committee before the end of February 2027. KLOW is a compounded prescription, and compounded medications are not FDA approved. None of this changes anti-doping status.

KLOW has never been studied as a blend. Its components are supported mostly by animal and cell research: BPC-157 in tendon and gut models, TB-500 in actin and cell-motility work with some human thymosin beta-4 trials, GHK-Cu in skin and matrix work, and KPV, which the FDA found has no published human studies at all. Being prohibited is not evidence that KLOW improves performance; S0 follows from approval status. More in what is KLOW, KLOW benefits and KLOW side effects.

The wider context is in peptides for athletes.

1. Complete a free online intake covering your history, medications and goals. Say if you compete in tested sport.
2. A physician licensed in your state reviews it, usually within 24 hours.
3. If it is appropriate, a PCAB-accredited, FDA-registered US 503A pharmacy compounds it. Lot results are at /quality/lab-results.
4. It ships refrigerated with ice packs, sterile syringes and alcohol prep pads, with your directions printed on the vial.
5. Refills come every 28 days, one vial per fill.

The step-by-step page is how to get KLOW prescribed online. Pepti is cash-pay and does not bill insurance.