Snake oil. Same stuff as Recapeen from 2004. A100 is also sold as "Provexin".
Funny thing that this paper is written by the same dudes that did a test on Recapeen as well back into 2004:
Jan Faergemann, M.D., Ph.D. and Thomas Hedner, M.D., Ph.D. Sahlgrenska University Hospital, 2004: The effect of Recapeen, a pollen extract gel, on hair growth and hair quality: an explanatory study (Study Report).
However this study cannot be found anywhere.
If it would work, we'd know it.