The Care Notebook

When thymalfasin comes up

The exact name

Start with the exact name.

The mix-up

Myth: Similar thymosin names describe the same substance.

The answer

Thymosin alpha-1 and TB-500 are different peptides, even though their names share a word.

Peptide describes its shape

Small building blocks link into a short chain called a peptide; proteins are made from those blocks.

Thymosin alpha-1 has 28 of those blocks.

The name peptide alone gives no answer about whether a treatment works.

Original paper on the peptide

Thymalfasin is another name to recognise

Thymalfasin is the man-made version of thymosin alpha-1.

Thymosin beta-4 is a different peptide; TB-500 is a piece of that peptide.

For any treatment offer, ask for the full ingredient name in writing. A shortened name can leave the conversation unclear.

FDA (US medicine regulator): thymalfasin FDA's separate ingredient entries

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