Be sure to pick a product that's undergone testing from a third-party lab, as this can help ensure that you're consuming only the ingredients listed on the label
doi: 10.1186/s13048-016-0245-8
One tricky part of the "S0" category is that it includes unapproved substances that aren't specifically listed because, for instance, there is no way to test for that drug and regulators don't want to reveal that to users

Regulatory Milestones 2022 (May) : FDA approval of Mounjaro for type 2 diabetes (5, 10, 15 mg doses) 2023 (November) : FDA approval of Zepbound for chronic weight management (same molecule, obesity-specific branding) 2024 : EMA approval in European Union for both indications 2025 : SURPASS-CVOT cardiovascular outcomes data published, showing MACE benefit Molecular Structure and Chemistry Amino Acid Sequence Tirzepatide is a 39-amino acid peptide based on native human GIP(1-42) with multiple modifications: Modified sequence : Tyr-Aib-Glu-Gly-Thr-Phe-Thr-Ser-Asp-Tyr-Ser-Ile-Leu-Asp-Lys-Ile-Ala-Gln-Lys-Lys*(C-20 diacid via Glu-2xOEG)-Ala-Phe-Val-Gln-Trp-Leu-Ile-Ala-Gly-Gly-Pro-Ser-Ser-Gly-Ala-Pro-Pro-Pro-Ser-NH 2 Single-letter code : Y- Aib -E-G-T-F-T-S-D-Y-S-I- L -D-K-I-A-Q- K K *- A -F-V-Q-W-L-I-A-G-G-P-S-S-G-A-P-P-P-S-NH 2 Where bold indicates non-native substitutions vs
Evening Tirzepatide Injection: Timing Strategy and Side Effect Management Evening injection between 5 p.m
References: Biaggioni I (2024): Adrenoceptor Agonists & Sympathomimetic Drugs (Chapter 9)