About Peptide Parks

Peptide Parks is a plain-language guide to the research-peptide world — who sells what, how they compare, and which suppliers earn their reputation. We aim to be the friendly first stop before you spend a dollar.

Who We Are

Peptide Parks was created by Mark Reynolds, a self-described data nerd who started keeping a spreadsheet of vendor purity results for his own use. It grew into a public resource once he realized how many people were flying blind. Mark keeps the criteria consistent and the opinions independent.

Every listing is re-checked over time, and rankings move as suppliers do. We’re only useful if we’re honest.