The 3 Week Diet
Questions & Answers

I personally just use proteinpulver from the store. Sure, those extras would be beneficial, but you should not force yourself. Still, you might lose a little weight less than you could.

I am in phase 3 as of yesterday and started using coffee and yohimbine. I noticed increased energy throughout day! Definitely beneficial after a long work day to have extra energy before my workout

Ditto. I didn't use Yohimbe due to it being somewhat controversial and didn't use caffeine either. Still lost 14 lbs in 21 days.

I didn't use the yohimbine at all and it still worked for me.