How to Start Your First Peptide Protocol: A Practical Guide

Most peptide guides jump straight to dosing tables. This one won't, because the dosing is actually the easy part. The harder questions — which compound to start with, how to assess whether something is working, what to track, what to watch out for — get less attention than they deserve.

Define What You're Actually Trying to Achieve

This sounds obvious but most people skip it. "General health" or "optimisation" is not a specific enough goal to design a protocol around. Are you trying to accelerate recovery from a specific injury? Improve sleep quality? Lose body fat? Support connective tissue as you age? Enhance muscle growth?

Different goals point to completely different compounds. Someone with a stubborn tendon injury and someone who wants to lose 15kg are not going to benefit from the same protocol. Getting specific about your primary objective narrows the field considerably and makes it much easier to assess whether what you're doing is working.

Do Baseline Bloodwork First

This is the step most people skip and most frequently regret skipping. Before you start any peptide protocol, get a baseline blood panel. At minimum: full blood count, metabolic panel including glucose, HbA1c, lipid panel, liver enzymes, and if you're considering GH secretagogues — IGF-1, LH, FSH, testosterone (total and free), and thyroid panel.

The purpose is twofold. First, it gives you a baseline against which to assess changes — if something shifts after six weeks, you want to know whether it was already heading that direction or whether it's attributable to your protocol. Second, it might reveal something you should know about before you start. Someone with already-elevated IGF-1 might think twice about compounds that raise it further. Someone with impaired liver function might prioritise that before adding anything else.

Private blood testing in the UK is reasonably accessible. Medichecks, Thriva, and Randox all offer panels that cover the basics, typically for £100–£200 depending on the scope.

Source Matters More Than Most People Admit

The research peptide market is not regulated in the same way pharmaceuticals are. Quality varies dramatically between suppliers. A poorly manufactured peptide might have the wrong amino acid sequence, degraded active compound, contaminants from synthesis, or simply be underdosed. Any of these will affect both your results and your safety.

Reputable suppliers provide third-party certificate of analysis (CoA) data for each batch — typically HPLC purity testing and mass spectrometry to confirm the peptide sequence. If a supplier doesn't provide this, treat the product as unverified. Price is not a reliable proxy for quality, but suspiciously cheap products from unverified sources are a consistent source of problems.

Learn to Reconstitute Properly

Most peptides arrive as lyophilised (freeze-dried) powder in a sealed vial. They need to be reconstituted with bacteriostatic water before use, and the concentration you create determines how you dose them. Getting this wrong — using too little water and over-dosing, or using the wrong diluent — is a common beginner mistake.

The standard approach is to inject bacteriostatic water slowly down the side of the vial, letting it dissolve without agitating the powder. Reconstituted peptides are stored in the refrigerator and are typically stable for 2–4 weeks. The specific concentration you mix will depend on the compound and your target dose — the reconstitution calculator in Peptidy handles this calculation automatically once you've entered your vial size and water volume.

Track Everything From the Start

This matters more than people realise when they start. Memory is unreliable over a 12-week protocol. Logging injection date, dose, site, any subjective notes, and periodic objective markers (sleep quality, training performance, body weight, how a specific injury feels) gives you something concrete to evaluate at the end.

It also means that if something changes — positive or negative — you have a timeline. Did the effect start after week two or week six? Did it correlate with a dose change? You can't answer those questions from memory after the fact.

Start With One Compound

The temptation when starting out is to run multiple compounds simultaneously. Resist it. If you start with BPC-157 and ipamorelin and CJC-1295 all at once and something goes wrong — or something goes very right — you won't know which compound is responsible. Starting with a single compound gives you clean data on how your body responds to it specifically. You can add others later once you have that baseline.

Cycle and Monitor

Most research protocols run in cycles — typically 8–16 weeks on, followed by a break — rather than continuous indefinite use. The rationale varies by compound. For GH secretagogues, receptor desensitisation is a concern with continuous use. For peptides like BPC-157, cycling mirrors how people typically use them anyway — to address a specific injury or period of intensive training rather than permanently.

Repeat bloodwork at the end of your cycle. Compare to baseline. If something has moved meaningfully, investigate rather than ignoring it. The compounds with the best safety records in anecdotal use are the ones where people are actually paying attention.

The Bigger Picture

Peptides are not a shortcut around the basics. They work alongside — and often amplify — the fundamentals: training stimulus, protein intake, sleep quality, stress management. Someone with a poor diet and inadequate sleep running a peptide protocol will get worse results than someone who has those foundations in place. They're a tool in a system, not a replacement for the system.

The people who tend to get the most out of peptide research are the ones who treat it with the same rigour they'd apply to any other performance variable — defined goals, careful tracking, honest assessment of results, and a willingness to adjust the approach when the data suggests it.