/sci/ - Science & Math

How do I go by on creating my own supplement pills for personal use? I do not want to spend millions on up-marked prices anymore. Can you combine anything you'd like? What dosages can I fit in pill sizes? Where can I buy the ingredients for this endavour? Should I get my own lab or borrow from somewhere to create my batches? What methods do I use? Do I need any gear? Do I need any permissions? Are there any legal loopholes? Should I just hire someone to do it for me?
I have a few ingredients that I wish to combine into 1. These include, but are not limited to:
>Cholecalciferol (Vitamin D3) 75 µg/0,075 mg
>Magnesium L-Threonate or Malate 1000 mg
>Caffeine 200 mg
>L-Theanine 200 mg
>Creatine Monohydrate 5 g (Might exclude this due to amount)
I think that's it. Appreciate any (You).