Vitamins, any nutritionists out there?

dusty8907

So i've read that some types of vitamins such as b complexes and vitamin d mostly come in synthetic form. I'm okay with this, but i've also read that some of these synthetic forms arent able to be absorbed by the body. So my question is, what ingredients am i looking for in a good:
Vitamin b complex
Vitamin d3
Omega 369
Magnesium
Potassium gluconate
Milk thistle
Zinc

dusty8907

Anyone?