Dr. Berg’s Healthy Keto and Intermittent Fasting Podcast 10 Vitamins You Should NEVER Take
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Oct 8, 2025 Discover which vitamins could be doing more harm than good in your health regimen. Synthetic Vitamin A can disrupt essential nutrients, while synthetic beta-carotene may increase cancer risk. Learn the dangers of folic acid for those with MTHFR gene variants and why synthetic B12 raises concerns. Dr. Berg warns against calcium carbonate and ferrous sulfate, as well as poorly absorbed magnesium oxide. Plus, discover why omega-6 supplements might inflate inflammation. Get the facts to keep your supplement cabinet safe!
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Skip Synthetic Vitamin A
- Avoid synthetic vitamin A (retinol palmitate/acetate) because it accumulates in liver and fat and can be toxic.
- Get vitamin A from egg yolks, liver, and cod liver instead.
Synthetic Beta-Carotene Risk
- Synthetic beta-carotene (often made from coal tar/petroleum) can increase lung cancer risk in smokers.
- Natural beta-carotene from foods behaves protectively while synthetic does not.
Prefer Folate Over Folic Acid
- Avoid folic acid supplements and fortified foods if possible; prefer folate or folate-rich foods.
- People with MTHFR gene variants cannot convert folic acid to active folate and may accumulate folic acid.