Iodine supplements can fix a genuine deficiency or quietly push your thyroid the other way. Here's what the evidence shows, plus the doses and warning signs to know.

Trace mineral supplements can cause nausea, hair loss, thyroid changes and drug interactions. Learn the side effects, risky doses and safer ways to take them.

Sugar-free electrolytes can be a smart swap, but they’re not side-effect free. Learn the risks, from bloating to potassium overload, and how to choose wisely.

Electrolytes can help dehydration, but too much sodium, potassium, or magnesium can cause side effects. Learn the real risks and how to rehydrate safely.

Vitamin C with zinc can cause nausea, cramps, metallic taste, and copper issues. Here’s how to spot the side effects, fix dosing, and know when to stop.

Cod liver oil benefits and side effects, explained: real doses, vitamin A limits, who should avoid it, and how to pick a bottle that hasn't gone rancid.

Krill oil benefits and side effects explained honestly — what the research supports, who should be cautious, realistic doses, and how it compares to fish oil.

Algae oil vs fish oil side effects compared: GI upset, burping, blood thinning, contaminants, dosage, and who should be cautious with each omega-3 source.

Vegan omega-3 supplements can cause stomach upset, algae burps, bruising and drug interactions. Here's what triggers each side effect and how to avoid it.

B12 acne, iron constipation, zinc nausea and iodine thyroid trouble: the real side effects of vitamins for vegetarians, and how to dose without them.

Best vitamins for seniors: side effects, drug interactions, safe doses, and practical tips to choose supplements without overdoing it or wasting money.

Vitamins for adults over 50 and their side effects: real doses, drug interactions, and common warning signs of too much vitamin D, B6, calcium and iron.