Prostate Peptide Bioregulator

Prostamax

Lys-Glu-Asp-Pro • KEDP Tetrapeptide

Prostamax is the synthetic tetrapeptide Lys-Glu-Asp-Pro, or KEDP. Compound-specific research includes rat models of chronic prostatitis and benign prostatic hyperplasia plus laboratory studies of human lymphocyte chromatin, but clinical prostate benefits have not been established.

Prostate Support Inflammation Tissue Integrity Prostate Bioregulator

Protocol Snapshot

Quick reference before the deep dive

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Daily Dose

500mcg–1mg

Community range used once daily by subcutaneous or intramuscular injection.

Cycle Length

10–20 Days

Community framework; no human study has validated a cycle or rest period.

Sequence

KEDP

Lys-Glu-Asp-Pro, the defined four-amino-acid sequence.

Evidence Base

Preclinical

Direct prostate findings come from animal models rather than human trials.

Peptide Grade

GradeC

Two published rat prostate models report tissue-level effects, and limited human lymphocyte studies support chromatin activity. The main limitation is the absence of controlled human prostate outcomes, validated dosing, and compound-specific clinical safety data.

Research Community Safety

Foundation

Research context, mechanisms, and practical use cases

What Is Prostamax?

Prostamax is a synthetic tetrapeptide composed of lysine, glutamic acid, aspartic acid, and proline. Its amino-acid sequence is Lys-Glu-Asp-Pro, which is why it is also called the KEDP peptide in research literature.

It belongs to the broader family of short peptide bioregulators developed and studied primarily by researchers associated with the St. Petersburg Institute of Bioregulation and Gerontology. Its developers describe it as prostate targeted, but tissue specificity and clinical benefit have not been validated in humans.

Prostamax is distinct from animal-derived prostate extracts that contain mixtures of peptides. Evidence from those extracts should not be treated as evidence for the defined synthetic KEDP sequence.

Prostamax Benefits

The compound-specific prostate evidence comes from two experimental rat models. These findings support a biological research signal, but they do not establish symptom relief, prostate-volume reduction, urinary improvement, or disease prevention in humans.

Chronic Prostatitis Model

In rats with induced chronic aseptic prostatitis, Prostamax reduced prostate swelling, vascular congestion, and lymphoid infiltration relative to untreated controls.

BPH Model

In a sulpiride-induced rat model, KEDP reduced lateral-prostate mass, volume, and epithelial area. This was an animal experiment, not a human BPH trial.

Tissue Remodeling

The prostatitis model also reported less collagen accumulation and fewer sclerotic or atrophic tissue changes after treatment.

Chromatin Research

Small laboratory studies of human lymphocytes reported changes in chromatin condensation after KEDP exposure. The clinical meaning of those ex vivo findings remains unknown.

Protocol Planning

Dosing, cycling, and preparation

Prostamax Dosing Protocol

No human dose-finding study has established an optimal dose, route, frequency, or cycle length. The ranges below come from practitioner use and the peptide-bioregulator framework, not an approved medical protocol.

Community Framework

Dose

500mcg–1mg once daily

Timing

Any consistent time of day

Routes

Subcutaneous or intramuscular

Cycle

10–20 days

Rest

2–3 months between cycles

Planning Notes

Starting Point

500mcg is the low end of the reported range

Higher End

1mg has not been shown superior in a human dose-response study

Track

Urinary flow, hesitancy, nighttime urination, urgency, and emptying

Objective Data

PSA, prostate size, and urinary flow require clinical measurement

Prostamax Reconstitution

20mg Vial

BAC Water

2mL

Concentration

10mg/mL

500mcg

5 units on a U-100 syringe

1mg

10 units on a U-100 syringe

Reconstitution Calculator

Handling Notes

Mixing

Add bacteriostatic water slowly down the vial wall

Dissolve

Swirl gently until clear; do not shake vigorously

Storage

Keep refrigerated after reconstitution

Inspect

Do not use a solution with unexpected particles or discoloration

Anecdotal Data Points

Community-reported outcomes and recurring patterns

Self-reported anecdotal experiences aggregated from public & private peptide community discussions and anonymous peptideprotocols.app user reports. This information does not carry the same weight as published research.

Positive Reports

Some users describe stronger urinary flow or less hesitation when beginning urination.
Reduced nighttime urination is reported by some users during or shortly after a cycle.
Some describe less pelvic pressure or a reduced sensation of incomplete bladder emptying.

Negative Reports

A meaningful number of users report no noticeable effect at all.
Effects are generally described as gradual rather than noticeable after a single dose.
Changes in PSA, prostate size, or objective urinary-flow measurements are rarely documented.
Some users report injection-site irritation, fatigue, headache, or temporary changes in urinary sensation.

Stacking & Synergy

Potential Prostamax pairings and tracking context

Prostamax Stacking & Synergy

Prostamax + Vesilute

A commonly discussed bioregulator pairing for combined prostate and bladder support. No controlled combination trial has established synergy.

Prostamax + Testagen

This combination is discussed for broader male reproductive support. Evidence for improved testosterone, fertility, or sexual function is absent.

Prostamax + Prostate Medications

No established interaction is known with alpha blockers or 5-alpha-reductase inhibitors, but symptom changes and PSA interpretation should remain clinician-guided.

Prostamax + TRT

Testosterone therapy can affect urinary symptoms and PSA monitoring. Use together should be discussed with the clinician managing testosterone treatment.

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Track in Journal

Track Prostamax with the markers that matter most for this compound.

Urinary flow and hesitancy.
Nighttime urination frequency.
Urgency and bladder emptying.

Start Tracking

Safety Notes

Side effects, contraindications, and precautions

Prostamax Side Effects

Published safety information is limited. The absence of frequent serious adverse events reflects sparse study rather than proven long-term safety.

No modern human safety trial has established Prostamax pharmacokinetics, long-term tolerability, immune effects, or safety in men with prostate cancer, elevated PSA, urinary obstruction, or significant kidney disease.

In Published Research

The compound-specific prostate studies were conducted in rats and do not provide a human safety profile.
No dedicated modern toxicology, pharmacokinetic, or long-term safety program has been published.
Effects on PSA, prostate tumors, fertility, hormones, and urinary obstruction remain unknown.

What Users Report

Reported: injection-site redness, tenderness, mild swelling, or bruising.
Less common: headache, fatigue, dizziness, flushing, or nausea.
Urinary worsening, fever, chills, blood in the urine, or inability to urinate requires medical evaluation.

Prostamax Contraindications and Precautions

Do Not Use If You Have

Known or suspected prostate cancer without approval from a urologist or oncologist.
An unexplained elevated or rapidly rising PSA that has not been medically evaluated.
Acute bacterial prostatitis, fever, chills, or systemic signs of urinary infection.
Acute urinary retention or inability to empty the bladder.
Known hypersensitivity to Prostamax or formulation ingredients.

Use Caution With

Benign prostatic hyperplasia, chronic prostatitis, or chronic pelvic pain syndrome.
Previous prostate cancer, prostate surgery, or recurrent urinary-tract infections.
Bladder obstruction or kidney impairment related to urinary retention.
Anticoagulant or antiplatelet therapy because injections may increase bruising.
Testosterone replacement therapy or medications that affect urinary flow or PSA interpretation.

Drug Interactions

No formal human drug-interaction studies have been conducted. No direct interaction is established with alpha blockers, finasteride, dutasteride, antibiotics, testosterone, or anti-inflammatory medications. Prostamax should not replace prescribed treatment for bacterial infection, urinary obstruction, or diagnosed prostate disease.

Monitoring

No established monitoring protocol exists. Depending on age, symptoms, and medical history, appropriate evaluation may include PSA testing, urinalysis, urine culture, digital rectal examination, post-void residual measurement, or urological assessment. Symptom improvement should not replace appropriate prostate screening.

Regulatory Status

Prostamax is not FDA approved for any medical indication. It remains an experimental peptide with no established human therapeutic dose or approved route of administration.

FINAL VERDICT

Peptide Protocol's Opinionated Opinion

This is not medical advice. This editorial is our own opinion piece based off the experience of our own lab rats.

We see Prostamax as a niche but legitimate prostate and urinary support peptide from the Khavinson bioregulator family. It’s not a miracle cure or something that’s going to dramatically change your life overnight, but it has a place for men over 40 who are dealing with BPH symptoms, frequent nighttime urination, or just want preventive support for prostate health.

After digging into the available research and user reports, the feedback is mixed but leans positive for those with mild to moderate issues. Some guys report noticeably better urinary flow, fewer nighttime trips to the bathroom, and an overall sense of comfort in the pelvic area after running full cycles. Others say they didn’t feel much at all. It seems to work best as part of a broader approach rather than a standalone hero product.

Full disclosure: we don't have any symptoms or issues that would lend us to trial Prostamax ourselves, therefore we have not used this compound. We view it as a smart, targeted option rather than a must-have for everyone. If prostate or urinary concerns are on your radar, Prostamax is worth considering in cycles. It’s not flashy, but for the right person in the right situation it quietly delivers. Niche product done right.