The source question
What counts as proof?
Ask whether a source answers the claim being made.
Here, FDA refers to the Food and Drug Administration, the US agency for drugs.
A study can ask whether a treatment helps. A drug register can show approval status. A licence record can show who is permitted to practise. Keep the question beside the source.
Which records establish benefit or approval?
A study appearing in the government trial register does not mean it has a result, and registration is not drug approval.
Ask for the published main result. Read who took part, what the treatment was compared with, and whether a clear difference was found.
What does “orphan” status mean?
Orphan status offers help for developing medicines for rare conditions; it is not permission to market a drug.
As checked September 28, 2026, the FDA’s thymalfasin orphan records showed no approval for those uses.
If an offer mentions this special status for rare-disease medicines, ask for the FDA approval record for the exact product and proposed use.
Does a drug identification number prove approval?
FDA’s drug directory uses a National Drug Code, shortened to NDC, to identify a product. Having an NDC does not mean FDA has approved that product.
The thymosin alpha-1 entries checked September 28, 2026 were raw-ingredient powders, rather than finished approved medicines.
If an advert shows an NDC number, ask for the exact product’s FDA approval record.
How does a date change the answer?
Ask when a source was checked and which country its record covers. Treat a claim about the United States as a question about the US record.
People asked FDA to add thymosin alpha-1 to a list of ingredients for pharmacy-made medicine, then took back that request. FDA’s webpage marked current April 22, 2026 still lists concerns about harm from medicines made with it.
The April 22, 2026 date tells you when FDA marked its webpage current. FDA does not state the date on which that request was taken back.