keto science You said it yourself: You take a supplement to protect yourself from deficiencies, including (but not limited to) iron and zinc. You're also at risk for missing potassium, magnesium, folic acid, and beta carotene. Know that the FDA doesn't oversee supplements, so you may not be getting exactly what you pay for. Plus, certain nutrients consumed as supplements can also have a pro-oxidant effect, meaning they do more harm than good. The end result: Increased risk of chronic disease, including heart disease and some cancers.

http://topdietbrand.com/keto-science/

https://www.youtube.com/watch?v=B8tBVGjSS3o