Levothyroxine (L-thyroxine, T4) Molecule

The thyroid hormones, triiodothyronine (T3) and its prohormone, thyroxine (T4), are tyrosine-based hormones produced by the thyroid gland that are primarily responsible for regulation of metabolism. T3 and T4 are partially composed of iodine. 

The thyronines act on nearly every cell in the body. 

Can be used as a pendant on a necklace, keychain, earring, or whatever you find it useful for.
Note: the material "(Polished) Strong & Flexible Plastic“ is not recommended for keychains! It’s great for earrings though!

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