Frequently Asked Questions

Peptul is a free peptide information platform for researchers and biohackers. It brings a peptide dose calculator, goal-based peptide protocols, a stack builder, and open vendor reviews together in one place, so you can research compounds like BPC-157, TB-500, semaglutide, ipamorelin, and GHK-Cu without hitting a paywall.

Peptul is an information platform and does not sell peptides.

Yes. Every core tool - the reconstitution calculator, the protocol library, the stack builder, and the vendor reviews - is completely free, with no paywall and no subscription. You only add a quick email login if you want to save your stacks and doses to your account.

Most peptide comparison sites lock their vendor reviews behind a paywall and run on an affiliate-first model. Peptul keeps all vendor reviews open and transparent, adds community outcome data you will not find elsewhere, and frames everything around education instead of selling. You get the research layer, not a storefront.

Peptul is built for anyone researching peptides - from beginners learning reconstitution and dosing math, to experienced researchers comparing vendors, exploring goals like fat loss, recovery, sleep, and longevity, and building multi-compound peptide stacks.

No. The calculator, protocols, stack builder, and vendor reviews all work with no account. You only sign in - with just your email, no password - when you want to save a stack or dose to your My Stuff page.

Enter your vial amount (in mg, mcg, or IU), the amount of bacteriostatic (BAC) water you are adding, and your target dose. The peptide calculator instantly shows how many units to draw on a U-100 or U-50 insulin syringe, plus the volume in mL and µL, the resulting concentration, and how many injections you get per vial. An animated syringe fills as you type so you can see the exact draw level.

Bacteriostatic water is sterile water with a small amount of benzyl alcohol, used to reconstitute lyophilized peptide powder into a liquid you can draw. The amount of BAC water you add sets the concentration, which directly changes how many units you draw for a given dose - so it is the key input that makes your peptide dose accurate.

Yes. The calculator has a blend mode for when more than one peptide shares the same vial and BAC water - for example a BPC-157 and TB-500 blend. It works out the draw, concentration, and injections per vial for each compound, and the syringe updates as soon as you fill in the shared water plus any one compound.

Pick one or two goals - fat loss, muscle recovery, sleep, injury healing, cognitive performance, longevity, gut health, skin and collagen, sexual health, or immune support - then choose a level from beginner to advanced. The stack builder returns a goal-based peptide stack with primary, support, and optional compounds, a protocol timeline, and a dos and don’ts section. You can then send the primary compound straight to the calculator to work out your draw.

Yes. Create a free account with just your email - a magic link, no password - and your saved stacks and doses are stored in My Stuff so you can return to them anytime. Saving is the only feature that needs a login; every tool works without one.

Each vendor gets a trust tier (Tier 1 to Tier 3) based on community consensus and third-party testing data, alongside details like COA availability, shipping coverage, pricing range, payment methods, and known issues. Reviews are community-sourced and editorially independent, so you see the full picture before choosing a peptide vendor.

Open information builds more trust than a paywall. Peptul keeps every peptide vendor review public and ungated because researchers deserve to compare vendors without paying for access. Our editorial independence is not for sale.

Yes. On the vendors page, open any vendor and use "Write a Review" to share your experience, including product quality, shipping times, and customer service. You can post anonymously, and your review helps other researchers make a more informed choice.

Tier 1 vendors have the strongest track record on testing, reliability, and community feedback. Tier 2 are solid but carry a few more open questions. Tier 3 have limited data or mixed signals. Tiers reflect research-based community consensus and testing data - never paid placement.

Vendors that have shut down or been raided stay listed in a separate section with a clear warning, and their historical reviews remain visible. Keeping that history transparent helps you avoid defunct or risky sources.

Peptides referenced on Peptul are discussed as research-use-only (RUO) materials for laboratory study. Legal status varies by country and by compound, and regulations change - for example the FDA reviews of compounds like BPC-157, TB-500, and KPV in 2026. Always check the current rules in your own jurisdiction.

This is general information, not legal advice.

No. The dosage ranges, protocols, and timing shown on Peptul are educational research reference points drawn from published study and community data. They are reference information, not prescriptions.

Always consult a qualified healthcare provider before using any research compound.

No. Peptul is an independent information platform, not a vendor or pharmacy. We never sell, ship, or handle any compounds. When you choose to buy, you do so directly with third-party vendors - Peptul just helps you research them first.

Peptul may earn a commission from some affiliate links when you choose to buy from a vendor, at no extra cost to you. These arrangements never influence vendor tiers, reviews, or editorial content.

Full affiliate disclosure is on the disclaimers page.

Yes. Peptul is intended for users 21 and older who are researching peptides for educational purposes. You can read the complete terms, including the research-use-only notice and limitation of liability, on the disclaimers page.