It's not nearly as pronounced as Osta, it doesn't feel like I'm on anything at all - and it's NOT exogenous either, it actually increases endogenous GH/IGF1 production. I just get more rest and actually seem to heal better, faster. Human studies were done up to 100mg/day and for 2 year durations w no ill sides except for dose dependent lethargy increases at the higher dosing, and numbing of hands.
I used 10mg for a few days and bumped to 20. Although even 10mg will help, but it will be even subtler.