23 Common Foods That Are Unexpectedly Bad for Your Skin

17. Iodine Overload: A Potential Pimple Promoter

While crucial for thyroid health, excessive iodine intake can be a surprising acne trigger for some individuals, often causing inflammatory papules or pustules, particularly around the mouth and jawline. Major sources include iodized salt, seaweed (especially kelp), dairy products, and some multivitamins or supplements. If you consume large amounts of these and struggle with persistent acne, evaluating your total iodine intake with a healthcare provider might uncover an overlooked factor contributing to your skin issues.

18. High-Dose B Vitamins (B6 & B12): Supplement Sabotage?

Can vitamins cause breakouts? Surprisingly, yes, in some cases. High doses of Vitamin B6 and particularly Vitamin B12, often found in energy drinks, pre-workouts, or potent B-complex supplements, have been linked to sudden acne flare-ups or worsening existing acne. The exact mechanism is unclear but might involve alterations in the skin's microbiome (P. acnes bacteria metabolism). If you've noticed breakouts after starting high-dose B supplements, consider reducing the dosage or stopping temporarily to see if it resolves.