These refer to kits of 10 vials. The number is the milligrams per vial, not the dose amount: - T10 = 10 vials × 10 mg each = 100 mg total tirzepatide - T30 = 10 vials × 30 mg each = 300 mg total tirzepatide - T60 = 10 vials × 60 mg each = 600 mg total tirzepatide Similarly, R20 would be 10 vials of 20 mg retatrutide each. T30 is the most recommended kit for newcomers—T10 vials are outgrown quickly during titration, and T30 kits are usually priced the same or cheaper than T60. Group testing is also much easier to find for T30.