An independent intelligence board aggregating credible research, preprints, clinical findings, biohacking experiments, and community discussions on therapeutic peptides, longevity science, and evidence-based anti-aging. Stories are scored for relevance, credibility, novelty, momentum, and practicality so the most important findings surface first.
Someone asked which blood tests to do before and after starting a mix of peptides — they named "klow" (unclear), "reta" (unclear), hCG, and Semax — because friends report feeling much better and they want objective measurements. Their GP is reluctant to support using peptides for "research only" purposes. They want to compare lab results, not just subjective feelings. A quick plain-English guide to the substances mentioned: hCG (human chorionic gonadotropin) is a hormone made in pregnancy; in medicine it’s sometimes used for fertility and, controversially, for weight or hormone-related purposes. Semax is a short synthetic peptide developed in Russia; it’s promoted for brain support, attention and recovery from brain injury, but high-quality large clinical trials outside Russia are limited. The other two names ("klow" and "reta") aren’t standard drug or peptide names I recognize from public literature; they might be nicknames, brand names, misspellings, or experimental blends. Because those two aren’t clear, any specific test recommendations for them would be guesses. What useful research or testing can realistically show? For hCG, standard blood tests can measure sex hormones and markers that respond to hCG: testosterone, estradiol, luteinizing hormone (LH), follicle-stimulating hormone (FSH), and sometimes SHBG (a protein that carries sex hormones). If someone is using hCG to affect fertility or testosterone, those tests will show whether hormones change. For Semax, there isn’t a simple blood test that proves “brain focus improved” — most evidence would be behavioral or cognitive testing rather than a blood marker. General safety labs before and after experimental peptide use are commonly recommended: basic metabolic panel (kidney and electrolytes), liver enzymes, complete blood count (CBC), thyroid function, fasting glucose and lipids. If you’re taking anything affecting hormones (like hCG), add sex hormones and maybe prolactin. Baseline and follow-up testing lets you detect changes or harms objectively. Why this matters: having baseline labs gives you a factual record instead of only feelings. That’s useful both to protect your health and to have evidence for your doctor if problems arise. If a peptide regimen is actually changing hormones or liver or kidney function, early detection can prevent harm. People who should especially care are those with preexisting conditions (liver, kidney, heart, diabetes, hormone disorders), people on other medications, and anyone planning to use peptides long-term. Important caveats and risks: do not assume all peptides are safe; regulatory approval, quality control, and reliable dosing vary. hCG has known effects on hormones and can cause side effects (mood swings, fluid retention, changes in menstrual cycles or fertility, blood clots in rare cases). Semax’s safety data in broad populations is limited. Because "klow" and "reta" are unclear, unknown risks may exist. Your GP’s caution about "research-only" peptides is reasonable: self-experimentation can miss drug interactions or complications. If you proceed, document the exact products and dosing, get baseline labs, plan scheduled follow-ups, and involve a clinician willing to review results. If your doctor refuses, consider an endocrinologist or a clinic that does lab-based monitoring rather than buying and using peptides without oversight. Bottom line: get clear names and sources for each peptide, do baseline labs (kidney, liver, CBC, fasting glucose/lipids, thyroid, and sex hormones if using hCG), repeat them on a schedule, and only proceed with medical supervision because benefits are uncertain and risks are real.
Source: r/Peptides