BPC-157 Dosage Chart: What Studies Used vs What Reddit Reports

This BPC-157 dosage chart separates two things that most dosing pages blend together: the doses that published studies actually used, and the amounts people on Reddit say they inject. The first set is mostly per-kilogram rat dosing plus a handful of one-off clinic injections. The second is anecdote. Neither is a prescription, because BPC-157 has no approved human dose.

For what the peptide is and how the evidence stacks up overall, see our BPC-157 peptide guide. This page is the dose-focused companion.

BPC-157 dosage chart: what the published studies used

Start with the table below, because it answers the question most people arrive with: what number appears in a paper. The honest answer is that the numbers are tiny per kilogram, large in the few clinic reports, and absent for the daily subcutaneous routine people actually follow.

Read the first two rows carefully. A 2026 study of Achilles tendon repair in rats gave BPC-157 at 10 µg/kg/day by intraperitoneal injection for four weeks (PMID 42542926). In that experiment, the BPC-157 group showed higher maximum load to failure than controls, but the difference was only statistically significant in the TB-500 group, and combining the two added no further benefit. A separate 2026 rat study of gentamicin kidney injury used 10 µg/kg and 10 ng/kg, given in drinking water or by daily injection (PMID 42533460). Those two figures are a thousand-fold apart.

The human rows are a different kind of evidence. The intravenous pilot gave 10 mg and then 20 mg in saline over an hour to two people and found no change in the biomarkers tested (PMID 40131143). The bladder study injected 10 mg of a compounded product around inflamed tissue in 12 women during one cystoscopy; 10 reported complete symptom resolution and 2 reported about 80 percent, with no adverse events (PMID 39325560). There was no control group, so placebo response and expectation cannot be separated from any drug effect.

A 2025 systematic review found 36 studies, 35 of them preclinical and one clinical, and reported no clinical safety data of any size (PMID 40756949). A second 2025 review counted three human pilots in total and called the compound investigational (PMID 40789979). The same systematic review puts the half-life under 30 minutes, with hepatic metabolism and kidney clearance.

Why animal doses do not convert into a human dose

People often ask for the "per kilogram" version of the chart. You can do the arithmetic, but you should know what it is. Regulators scale rodent doses to humans using body-surface-area factors, roughly 6 for a rat and 37 for a human. Applying that to 10 µg/kg gives about 1.6 µg/kg, or roughly 146 µg for a 90 kg adult. That number is my calculation, not a figure from any BPC-157 paper, and it only describes how a rat dose could scale if the peptide behaved the same way across species and routes.

It likely does not. The rat studies injected into the abdominal cavity or used drinking water, routes with different absorption from a subcutaneous injection near a tendon. In the tendon study the animals were young male rats with a surgically created injury. In the papers we checked, doses span a thousand-fold, with no head-to-head comparison showing that more peptide works better.

Two practical consequences follow. First, the flat 250 to 500 mcg figures that dominate vendor pages and the online dosing charts are community convention, not something a trial derived. The published work we could verify is dosed per kilogram, and we found no source showing that body size stops mattering. Second, the gap between a scaled rat dose (about 150 µg) and the 500 to 1,000 µg that Reddit users report is a factor of three to seven, and nobody has tested whether the extra helps or harms.

What Reddit users report taking

To see what people do in practice, I read 116 posts and comments mostly from June to October 2026 across r/Biohacking, r/Peptidesource, r/bpc_157, r/BiohackingU, r/BodyHackGuide and r/wellnessandhealthlife, all returned by searches on BPC-157 dosage. After removing 14 deleted comments, a removed one, 9 bot or moderator notices, and the replies that were questions or jokes, 17 comments named an injectable or unspecified-route BPC-157 amount for themselves or as a suggestion. Another 3 discussed oral capsules. That is a small, self-selected sample from people who chose to post, and none of it is verified.

Here is how the 17 distribute.

The mode was 500 mcg a day, usually as one injection, sometimes split into 250 mcg morning and evening. One commenter described the logic plainly: "500mcg ONCE a day is enough to try to help an injury. 250mcg ONCE a day is enough for long term “maintenance”." (a r/Biohacking commenter, Jul 2026, link). Several described titrating: starting at 250 mcg, moving to 500 mcg after a week, then to 1 mg. Six people named 1 mg, one of them 3 to 4 times a week rather than daily. Several were combining it with TB-500, so the effects they describe cannot be pinned on BPC-157 alone.

Reported durations were rough: about 4 weeks, 8 weeks planned, 10 weeks done, 2 to 3 months planned. One commenter suggested a break after about 12 weeks, with no source. Oral capsules came up three times, at 500 mcg capsules taken once or twice a day, or 1,000 mcg on an empty stomach, mostly framed as being for gut health.

What did people say happened? Mostly mild positives, framed loosely. A r/bpc_157 commenter (Oct 2026) wrote "500mcg bpc 1pd for 2 weeks stopped the pain from my arthritic knees. Placebo? Maybe." (link). Another, after about two months on a high dose for a spinal injury, called the result positive but unremarkable. One person in week 2 at 500 mcg a day had seen no improvement yet. Side-effect reports were nearly absent, but one r/Biohacking commenter (Jul 2026) wrote "It gave me shingles" (link). We can't tell which products they used, or whether the peptide had anything to do with it.

One outlier deserves a flag. A r/bpc_157 commenter (Oct 2026) wrote "I have personally taken 2-3mg per day with no issues or side effects" (link). A single person feeling fine is not a safety study, and the same comment adds that there is no established lethal dose, which is a statement about missing data rather than about safety. Treat it as an outlier.

Skeptics showed up too. A r/wellnessandhealthlife commenter (Sep 2026) asked: "Curious how much of the dosing advice online is actually reliable though." (link). That question is a fair summary of this section. A clinic-style account claimed no adverse effects across hundreds of patients; we excluded it because it can't be checked and the source sells services.

Reconstitution math: mg, mL and syringe units

Most Reddit dosing threads are really reconstitution threads, and they go wrong in predictable ways. The vial holds a fixed mass of freeze-dried powder. Adding more water does not change the total mass, only the concentration, and so the volume you draw for any given dose.

The formula is: units on a U-100 syringe = dose in mcg ÷ concentration in mcg/mL × 100. A worked example: a 10 mg vial reconstituted with 2 mL of bacteriostatic water is 10,000 mcg in 2 mL, or 5,000 mcg/mL. A 500 mcg dose is 500 ÷ 5,000 = 0.1 mL, which is 10 units on a syringe where 100 units equals 1 mL.

Scaling by vial size works the same way. A 10 mg vial holds 40 doses of 250 mcg, 20 doses of 500 mcg or 10 doses of 1 mg. A 5 mg vial holds half of each. At 500 mcg a day, a 10 mg vial lasts 20 days and a 5 mg vial lasts 10. In one Reddit thread, a commenter using a 10 mg vial at 0.5 mg a day answered that it lasts 10 days; the arithmetic says 20, which is the sort of slip that happens when people skip the division.

Water volume is a convenience choice. Reddit comments mentioned 1 mL, 2 mL and 3 mL for a 10 mg vial, and a r/wellnessandhealthlife commenter (May 2026) noted that a vial label said 3 mL while an online guide said 2 mL. All work if you recompute: more water means a larger, easier-to-read draw, less water a tiny volume that is harder to measure. Another slip: one user (r/Peptidesource, Aug 2026) wrote a dose as 0.5 mcg for a 10 mg vial in 2 mL, which almost certainly meant 0.5 mg, a thousand-fold difference. Mcg and mg errors are the most dangerous mistake in the whole topic, so write the units out.

The vial itself matters too. Our guide to where to buy BPC-157 covers how to read a certificate of analysis. If you want a single supplier to check against, Ascension Peptides sells a BPC-157 10 mg vial at $49.00 as of 2026-10-11 ($4.90 per mg). Kovera Labs tests every batch (HPLC, LC-MS identity, net content, endotoxin, sterility and heavy metals), more than 98 percent of tested batches pass, and batch certificates are public. Prices are in US dollars, shipping is US only and all sales are final. New customers can use code PEPTIDEDECK for 50 percent off. It is a research chemical, labeled not for human use.

Timing, frequency and cycle length

There is no tested schedule, so what follows is what the sources say rather than what to do. The short half-life, under 30 minutes in the systematic review (one Reddit commenter said an hour or two), is the reason people argue for daily or twice-daily injection rather than a few times a week. No study compared schedules in humans.

On timing within the day, the Reddit comments split between morning, evening and before sleep on an empty stomach. One user injected BPC-157 in the evening and TB-500 in the morning to isolate side effects.

Cycle length is the weakest area. The animal tendon study ran four weeks. The Reddit mentions cluster around 4 to 12 weeks with breaks, and none cites evidence for a break. If someone did run a long course, nothing is known about repeated cycles over years.

What changes the dose

These variables are said to matter, though none can be quantified.

Route. Intravenous, subcutaneous, intra-articular, oral and intravesical are different experiments. The 10 mg and 20 mg in the human reports were clinic infusions and local injections, not daily self-injection. BPC-157 is reported to be acid-stable, which is why oral capsules exist and why Reddit users associate them with gut use, but the oral doses people report (500 to 1,000 mcg) have no human dose-response data behind them.

Goal and location. Some commenters inject close to the injury and say it works better there. No human study compares injection sites.

Blends. Many vials are mixtures. A commenter asking about a 40 mg vial of roughly half BPC-157 and half TB-500 needs to halve the amount before comparing to any single-peptide number, and a KLOW or GLOW blend contains other peptides in different ratios. One commenter asked whether "1 mg" of a blend meant 500 mcg of each peptide or 1 mg of each, which is exactly the ambiguity to avoid.

Body weight. The animal studies scale by kilogram; community charts do not. Whether body size matters in people is untested.

Health conditions. The mechanism involves new blood vessel growth, and one commenter raised the theoretical concern that unknown cancer cells could benefit. That is a reasonable caution. See our BPC-157 side effects page for the documented and reported adverse events, and our BPC-157 benefits page for how strong the evidence is for each claimed effect. Anyone with a cancer history, pregnancy, or on prescription drugs should talk to a clinician first.

Product quality. If the vial contains less than the label says, every calculation above is wrong. This is the least discussed and most likely reason two people on the "same dose" report different results.

Frequently Asked Questions

What is the BPC-157 dosage?

There is no established BPC-157 dosage for humans. Published animal studies dose per kilogram (for example 10 µg/kg/day in rats), and the few human reports used single clinic injections of 10 to 20 mg. The 250 to 500 mcg figure online is community convention, and Reddit users most often reported 500 mcg or 1 mg a day.

How many units of BPC-157 is 500 mcg?

It depends on the water you added. With a 10 mg vial and 2 mL of water the concentration is 5 mg/mL, so 500 mcg is 0.1 mL, or 10 units on a U-100 syringe. With 1 mL it is 5 units, and with 3 mL it is 15 units. Divide the dose by the concentration, then multiply by 100.

How long do people run BPC-157?

Reddit comments mention about 4 weeks, 8 weeks planned, 10 weeks completed and "2 to 3 months", with one suggestion of a break after about 12 weeks. No study defines a cycle length in humans, so these are habits, not evidence.

Is BPC-157 dosed by body weight?

In animal studies, yes: doses are written per kilogram. In community charts, no: the same flat number is given to everyone. Which approach is right for people has not been tested.

Is BPC-157 legal and FDA-approved?

It is not FDA-approved for any use. It is sold as a research chemical and is prohibited in tested sport. Some clinics and compounding pharmacies supply it, and the bladder pilot used a compounded product, but we have not verified the current compounding rules, so ask a clinician rather than assuming.

Checking a vial before you do any math

The dose math assumes the label is true, so confirm lot, purity and mass first. Ascension Peptides lists the 10 mg vial at $49.00 as of 2026-10-11, with per-batch Kovera Labs testing and public batch certificates; US shipping only and all sales are final. Write units out in full, and treat every Reddit number here as an anecdote.