✦ The Source Code Toolkit — Your bonus resource bundle
Return to course player →The Source Code Toolkit is included free with enrollment in The Source Code course. Enroll to get instant access to all four resources.
Enroll — $97Four practical resources to put what you've learned into action. Use them while you research, before you buy, and when building your protocols.
Run any peptide supplier through these 18 checks before placing an order. Check off as you go — progress saves automatically.
Identity & Transparency
Testing & Certificates of Analysis
Product & Handling
Reputation & Community
What every column means, what numbers to accept, and what to reject on sight.
Key Fields & What They Mean
| CoA Field | What It Tests | Accept If | Reject If |
|---|---|---|---|
| Purity (HPLC) | Percentage of the sample that is the target peptide | ✓ ≥98.0% | ✗ <97% or blank |
| Identity (MS) | Mass spectrometry confirms the molecule matches the expected molecular weight | ✓ "Conforms" or MW within ±0.5 Da | ✗ Not tested or different MW |
| Sequence Confirmation | Amino acid sequence verified (critical — purity alone doesn't confirm identity) | ✓ Explicitly confirmed | ! Missing — ask the vendor |
| Water Content (KF) | Karl Fischer titration — measures how much water is in the sample (affects actual peptide content) | ✓ <8% water | ✗ >12% (inflated weight) |
| Acetate / TFA Content | Residual salt from synthesis — high TFA can cause irritation; acetate form is preferred | ✓ Acetate salt or low TFA (<0.5%) | ! High TFA — acceptable but note |
| Appearance | Physical description (color, form) | ✓ White or off-white powder | ✗ Yellow, brown, or oily |
| Batch Number | Should match the batch number on your product vial | ✓ Matches vial label exactly | ✗ Missing, generic, or mismatched |
| Lab Letterhead | Issuing laboratory contact info | ✓ Named third-party lab, verifiable online | ✗ In-house report or unverifiable lab |
Six Red Flags — Reject on Sight
Answer these questions before starting any peptide protocol. Not checkboxes — these are genuine questions to sit with.
Personal Health Baseline
Research & Evidence
Sourcing & Product
Protocol & Monitoring
A structured template for designing, documenting, and tracking your peptide research protocols.
Peptide(s) in Protocol
Sourcing & Verification
Outcomes & Tracking