T3/Cytomel (Liothyronine Sodium)

What is Cytomel (Liothyronine Sodium)?

Cytomel is the brand name for liothyronine sodium, a lab-made form of T3. T3, or triiodothyronine, is a thyroid hormone.

The thyroid is a gland in the neck. A thyroid hormone plays a role in metabolism, the process cells use to turn food into energy.

It comes as a tablet, made in a lab for research use only.

What researchers study it for

• Metabolic rate. Researchers study how it affects the rate at which cells use energy.
• Fat and energy balance. Studies look at fat tissue and energy use in lab and trial models.
• Thyroid function. Labs study its role alongside natural thyroid hormone activity.

What you get

One bottle of 50 tablets. Choose 25 mcg or 50 mcg tablets.

How to store it

Keep the bottle in a cool, dry spot, away from direct sunlight.

Words you might not know

• T3 (triiodothyronine) — a hormone made by the thyroid gland.
• Thyroid — a gland in the neck that makes hormones.
• Metabolism — the process cells use to turn food into energy.

Sold for laboratory research only. Not for human consumption.