Is Thymosin Alpha-1 Legal in the UK and UAE?
Thymosin Alpha-1 is not a controlled substance in the UK. It holds regulatory approval in some other countries under the brand Zadaxin but has no MHRA marketing authorisation, so UK supply is lawful only as a research reagent.
Thymosin Alpha-1 is not scheduled as a controlled substance in the UAE. Zadaxin holds registration in some markets, but any UAE supply outside DHA/MOHAP-licensed clinical channels is research-use-only.
UK detail
Thymosin Alpha-1 is marketed as an approved immune-modulating medicine (Zadaxin) in a number of countries, though not currently in the UK or the wider EU/UK regulatory framework. It is not on UK controlled-substance schedules, so research purchase is lawful, but without a UK marketing authorisation it can only be sold and supplied here as a laboratory reagent, not for immune-support or clinical claims.
UAE detail
Thymosin Alpha-1 is not scheduled in the UAE. Zadaxin has registration status in some regional markets under clinical prescribing, which is a separate channel from the research-reagent supply this page describes.
This is a general overview, not legal advice, and law in this area can change. For a specific situation, consult a solicitor with life-sciences regulatory experience (UK) or MOHAP/DHA directly (UAE). See our full UK compliance guide and UAE compliance guide for the full legal framework this page summarises.