SIDE-BY-SIDE EVIDENCE
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Select 2–3 profiles from the English Library. Class and grade describe evidence and regulatory context, not comparative effectiveness or suitability for an individual.
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| Molecule |  Liothyronine sodium / T3 | Levothyroxine / T4 | Clenbuterol |
|---|---|---|---|
| Research Topic | Clinical / Endocrine Pharmacology | Clinical / Endocrine Pharmacology | Clinical / Endocrine Pharmacology |
| Pharmacology | Prescription thyroid hormone (synthetic T3) | Prescription thyroid hormone (synthetic T4) | Long-acting beta-2 adrenergic agonist not FDA-approved for human use |
| PrimeCore Class | Class AApproved in a bounded context | Class AApproved in a bounded context | Class BInvestigational |
| Evidence Grade | Grade AStrong regulatory + clinical evidence | Grade AStrong regulatory + clinical evidence | Grade EPreclinical evidence |
| Evidence boundary | Liothyronine sodium / T3 is classified here as Prescription thyroid hormone (synthetic T3). Current labels support defined thyroid indications and carry a boxed warning against use for obesity or weight loss. FDA-authorised prescription labels exist for defined thyroid indications; WADA status and TUE requirements must be checked for an athlete's exact context. A catalogue name does not establish identity, formulation, quality or authorisation, and this page provides no dosage, mixing, injection or purchasing instructions. | Levothyroxine / T4 is classified here as Prescription thyroid hormone (synthetic T4). Strong clinical and regulatory evidence applies to hypothyroidism and other labelled contexts, not performance or non-deficient weight loss. FDA-authorised prescription products exist; the catalogue shorthand T4 does not establish manufacturer, potency or authorisation. A catalogue name does not establish identity, formulation, quality or authorisation, and this page provides no dosage, mixing, injection or purchasing instructions. | Clenbuterol is classified here as Long-acting beta-2 adrenergic agonist not FDA-approved for human use. Human misuse reports and veterinary/regulatory records are more relevant than performance claims; no FDA-approved human product exists. Not FDA-approved for human use; prohibited by WADA under beta-2 agonists at all times except narrowly specified permitted inhaled medicines that do not include clenbuterol. A catalogue name does not establish identity, formulation, quality or authorisation, and this page provides no dosage, mixing, injection or purchasing instructions. |
| Unknowns | Insufficient data in the current dataset | Insufficient data in the current dataset | Insufficient data in the current dataset |
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| Sources | |||
| Read more | Read English overview | Read English overview | Read English overview |
This table does not compare doses, cross-trial outcomes or individual suitability. Missing information does not establish an absence of risk.
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Missing fields mean information is unavailable in the current structured dataset, not that a molecule has no risks or uncertainties. English translations retain the original evidence boundaries. Where translation is not yet verified, the original Thai excerpts remain available under an explicit label. Sources retain their original language.
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