I own your brain cells. ph334 the "AMP-activation".
 

Scientists say an enzyme in the brain that monitors energy in cells also appears to regulate appetite and weight, a discovery that could lead to new treatments for obesity.

The enzyme is known as AMP-activated protein kinase, or AMPK.

Harvard researchers found in experiments with mice that when AMPK was inhibited, the animals ate less and lost weight. When AMPK levels were boosted, the mice ate more and gained weight.

linkage

One pill makes you larger,
And one pill makes you small,
And the ones that mother gives you,
Don't do anything at all.