1. Bleach + Vinegar = Toxic Chlorine Gas
2. Ammonia + Bleach = Toxic Chloramine Vapors
3. Rubbing Alcohol + Bleach = Chloroform
4. Hydrogen Peroxide + Vinegar = Parecetic Acid
5. Baking Soda + Vinegar = Ineffective Cleaning Solution
6. Two Different Battery Brands = Corrosion
7. Medicine + Grapefruit Juice = Adverse Effects
8. Acetaminophen + Alcohol = Irreversible Liver Damage
9. Red Bull + Milk = Stomachaches
10. Glycolic Acid/AHAs + Retinol = Ineffective Skincare
11. Ibuprofen + Alcohol = Torn Stomach Lining
12. Compound Henna Hair Dye + Hydrogen Peroxide = Foul Chemical Reaction
13. St. John’s Wort + Contraceptives = Ineffective Birth Control
14. Morel Mushrooms + Alcohol = Morel Poisoning
15. Retinol + Sunshine = Risk of Sunburn
16. Antibiotics + Dairy = Reduced Efficacy
See entire article with explanation @ Buzzfeed