Peptide supplier comparison scorecard
Enter up to three suppliers you are considering and score each one against the same vetting criteria. The scorecard rates the suppliers you enter; it does not rate or recommend any supplier itself.
Scope. The scorecard rates only the suppliers you enter. It does not rate or recommend any supplier. Research use only context. Not legal advice.
Criteria, weights and what to check
The host post says to weight criteria by your own business needs but gives no numbers and no scoring scale. This tool therefore gives every criterion the same weight of 1 and uses a simple 0 to 3 scale. Both are the tool's own choice, not the post's. When a criterion does not apply to a supplier, such as import documentation for a supplier in your own country, the tool asks you to score it 3 so it does not lower that supplier's total; that rule is also the tool's own choice.
| Criterion | What to check | Weight | Must pass |
|---|---|---|---|
| Clear research use only positioning | Read the supplier's website terms, product descriptions and any certificate of analysis for a plain statement that products are for research purposes only. | 1 | Must pass |
| Certificate of analysis for each batch | Ask for a certificate of analysis for each batch, with purity data, mass spectrometry data and residual solvents testing, and check that a qualified laboratory ran the tests. | 1 | Must pass |
| Business license documentation | Ask for the supplier's business license documentation and check which licenses apply to their activities and location. | 1 | Must pass |
| Batch and testing records | Ask for evidence of batch records, synthesis reports and analytical testing documentation, and see whether they can produce them. | 1 | No |
| Import documentation, if sourcing internationally | If the supplier ships from another country, check that they understand FDA import requirements and can provide the documentation needed for customs clearance. If it does not apply to your supplier, score it 3 and note why. | 1 | No |
| Contact for compliance questions | Check that the supplier gives a named contact you can use for compliance inquiries, and that they reply. | 1 | No |
| Batch to batch consistency | Compare historical batch data for purity and appearance against the specifications you agreed with the supplier. | 1 | No |
| Storage and shipping handling | Ask how the supplier stores and ships product, including lyophilization, cold chain management where it applies, and packaging. | 1 | No |
| Lead times, minimum orders and shipping options | Compare lead times, minimum order quantities and shipping options against what your inventory plan needs. | 1 | No |
| Support responsiveness | Send a technical question about the product and see whether the answer is accurate, compliant and timely. | 1 | No |
| Signs of an established operation | Look for years in business, a professional website and more than one contact method. These are hard to verify directly, so score them cautiously. | 1 | No |
Scoring scale
- 0 Not shown: The supplier refused, could not show it, or the evidence does not match the product.
- 1 Weak: Partly shown, vague, or hard to confirm.
- 2 Adequate: Shown and consistent with the product you would buy.
- 3 Strong: Shown in writing, specific, and checked against the exact product.
The post lists three items every supplier should provide at minimum. This tool treats those three as must pass. The minimum score of 2 for a must pass item is the tool's own threshold, not the post's.
Worked example with three fictional suppliers
These three suppliers are made up for this example. The scores are invented to show the arithmetic and are not a finding about any real company.
| Criterion | Example supplier A | Example supplier B | Example supplier C |
|---|---|---|---|
| Clear research use only positioning | 3 | 3 | 2 |
| Certificate of analysis for each batch | 3 | 1 | 2 |
| Business license documentation | 3 | 3 | 2 |
| Batch and testing records | 3 | 2 | 2 |
| Import documentation, if sourcing internationally | 2 | 2 | 1 |
| Contact for compliance questions | 3 | 2 | 2 |
| Batch to batch consistency | 2 | 2 | 3 |
| Storage and shipping handling | 2 | 1 | 3 |
| Lead times, minimum orders and shipping options | 1 | 3 | 3 |
| Support responsiveness | 2 | 3 | 3 |
| Signs of an established operation | 3 | 2 | 2 |
| Total (maximum 33) | 27 of 33 | 24 of 33 | 25 of 33 |
| Must pass status | All must pass items met | Fails a must pass item | All must pass items met |
Ranking by total:
- Example supplier A: total 27 of 33, all must pass items met
- Example supplier C: total 25 of 33, all must pass items met
- Example supplier B: total 24 of 33, fails a must pass item
A total can rank a supplier high even when it fails a must pass item, so read the status beside the total.