Drinking large amounts of non-milk beverages like almond or oat milk may reduce iodine levels in the body because these drinks contain very little iodine, and increased urine output removes more...

When healthy adolescents and adult women drink more fluids and produce more urine, their bodies excrete more iodine through urine, even when their diet stays the same.

People who drink more fluids tend to excrete more iodine in their urine, even when their dietary iodine intake from foods like salt, milk, and fish is accounted for. This suggests that how much fluid a person consumes affects how their kidneys remove iodine from the body.