Trigonella foenum graecum has been proven to help increasing gh hormone
But be careful I've read it can be dangerous in excessive use.
The loving planet Jupiter may help you as it rules abundance and gaining weight ( doesn't specifically refers to fat mass )
But be warned again ,you have to direct the jupiters energy once you raise it ,a positive clear ,short and present tense sentence like :
" in a healthy way for me , my growth hormone is increasing in me "
Or something like that
In ending of the post ,
Jupiter itself is short square and you can experiment with it