The live spread is on Retatrutide price comparison: $0.128–$21.00 per mg (verified October 2026). The low end is often a bulk vial, and shipping, taxes and customs aren't included.
To turn a price into a monthly cost, the Peptide cost-per-dose calculator does the arithmetic: price per mg × milligrams per week × weeks. Peptigrity doesn't recommend a dose, so the weekly amount you enter is yours; the doses retatrutide's trials used are listed against each trial on the Retatrutide guide.
Price is half of it. A vial that's short on content costs more per real milligram, so check the batch on Retatrutide lab tests