Websites like Finnrick provide testing for gray market research peptides (including tirzepatide and retatrutide). There are no direct links to shops, etc., but you can at least see the current state of things, both good and bad.
Cremieux is a popular biohacker on Twitter who has a paid Substack describing the process.
Cremieux is a popular biohacker on Twitter who has a paid Substack describing the process.
That's enough to get anyone started.