"I get nausea when I take too many supplements. I am for supplementation but I have problems when I take too many."

They need to be taken right after eating a large meal. You also need to take high quality supplements and avoid things like iron sulfate or calcium carbonate that can cause digestive discomfort. For iron supplements, use iron bisglycinate. For calcium, use calcium citrate or calcium ascorbate. Use niacinamide rather than niacin. Use a buffered form of vitamin c, such as calcium ascorbate or magnesium ascorbate.