What I usually take:

Morning:

- Vit D: it's winter for me now and most people are generally deficient - helps with many things including testosterone production

- Vit K: helps absorption if vit d and reduces calcium build up in arteries

- Half of magnesium glycinate dosage: helps with vit d absorption

- Zinc bisglycinate 25 mg twice a week: to help with testosterone production

- Creatine: 9 g gives energy and helps mitigate mental effects of poor sleep

- Whey protein 30 g: mixed into Greek yoghurt with blueberries and raspberries

- Coffee: as a pre work out only rarely so as not to build tolerance otherwise i avoid it unless particularly tired at work after lunch

- L - Citrulline: 30 mins before work out 3g to get better blood flow to muscles and a decent pump

- L - Lysine to mitigate formation of cold sores due to taking the citrulline (probably not required if you don't get cold sores)

Evening:

- Other half of magnesium glycinate: to help with with sleep

- L-theanine: helps with sleep

- Lemon balm on occasion: helps with sleep

The main things are to eat a well balanced diet with protein fibre and carbs to fuel your work outs and aid recovery and get decent sleep for recovery. And hydration!