Education only. Not medical advice • Compounds via JP Research, research use only • For research & informational use
🌿 The naturalist’s guide to peptides

Every peptide,
explained by Carl.

Plain-English breakdowns of what each peptide is, how it works, what the research actually says, and how people put them together — minus the bro-science and the sales pitch.

91 protocols
11 stacks
7 categories
0 things sold
Carl the capybara waving in a lab coat
Fresh off the desk

Latest from Carl

Supplier reviews and plain-English guides, newest first.

See all articles →
Carl grades SA

Carl grades Peptide Labs: a dosing tab on every research-only product, and no lab reports, 4/10

A fair post on why a lab certificate alone isn't enough, then no lab reports at all, and a dosing tab on all 14 research-only products.

15 Oct 2026 · 12 min readRead →
Carl grades SA

Carl grades Regen-X: no dosing and accurate trial numbers, but no lab reports at all, 6/10

The first SA shop with no dose guides anywhere, and trial numbers that check out. But no lab report for any product.

15 Oct 2026 · 8 min readRead →
Carl grades SA

Carl grades Lekker Peptides: careful guides, then dosing schedules in the shop, 6/10

Accurate citations and an honest legal guide, next to injection schedules on research-use products and medicines with an open Add to cart.

15 Oct 2026 · 9 min readRead →
01 — THE DIRECTORY

Protocols

Individual peptides, grouped by what people reach for them for.

All Healing & Recovery Fat Loss Growth Hormone Anti-Aging & Skin Cognitive & Mood Specialized Mitochondrial & Energy
02 — COMBINATIONS

Stacks

Named combinations people run together, and why.

Carl
📩 The Field Notes

Ask Carl — and get the cheat-sheet.

One plain-English peptide breakdown in your inbox each week, plus Carl’s free Beginner’s Field Notes (the one-page “what’s what” PDF). No hype, no spam, unsubscribe whenever.

Free. We’ll never sell your email. Education only — not medical advice.
03 — LEARN

Guides

Start here if the directory looks like alphabet soup.

🧭

Getting Started

What peptides are, how they’re measured, and the vocabulary — from zero.

⚖️

Comparisons

BPC-157 vs TB-500. Sema vs Tirz. Side-by-side, no favorites.

🎯

Best For

By goal — recovery, fat loss, sleep, skin — what maps to what.

💊

GLP-1 Nutrients

Eating less on Ozempic/Mounjaro? The vitamins & protein that matter.

📜

Legal & Safety

Research-use status, regional rules, and how to read a lab report.

04 — TOOLS

Tools

Carl does the arithmetic so you don’t fat-finger a decimal.

💉

Reconstitution Calculator

Vial mg + water + target dose → units on the syringe, plus how long the vial lasts.

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Blends Calculator

Two+ peptides in one vial? What each draw delivers, and units for a target dose.

📊

Dose Converter

mcg ↔ mg ↔ IU, and per-kg bodyweight helper.

🗓️

Cycle Planner

Map a protocol across weeks and export calendar reminders.