RU-58841 Results and UK source?

[Naz]

1. Anyone using only RU-58841 to maintain their hair? (ie no fin, dut or minox)

Its meant to protect against all androgens binding to the hairs receptors as opposed to only DHT (as Test also impacts AGA).

2. I can only find 1 UK source, Is this UK source legit to buy from?

https://receptorchem.co.uk/ru58841/

3. If not, where is the best place to buy RU-58841?

4. Is it true the pre-mixed form is no good as it degrades fast?