Not much non-hormonal will increase it directly. Even Creatine has an effect however by increasing the conversion to DHT. I'll find my source of information if you want, but increasing 'FREE' testosterone may be the better question when looking at non-hormonal solutions. VIRON and VECTOR by BLR helps to increase free testosterone and add to a bulk.
Quite a few "Testosterone Boosters" are working with those whom have a decrease in their natural testosterone.
We need more information.
EDIT: Yes, 30% QUARANTINE = code.