Final answer:
The false statement is that there is generally not much toxicity associated with water-soluble vitamins. While toxicity is rare due to their excretion by the kidneys, excessive intake of vitamins, especially from supplements, can lead to toxic effects.
Step-by-step explanation:
The statement that is FALSE about water-soluble vitamins is:
d. Generally not much toxicity
Water-soluble vitamins, which include the eight B vitamins and vitamin C, are absorbed with water in the gastrointestinal tract. These vitamins are known to travel freely in the blood, and because they are not stored extensively in the body, excess amounts are typically excreted by the kidneys in the urine. While it is true that toxicity is rare for water-soluble vitamins due to this mechanism of excretion, it is not correct to suggest that there is generally no toxicity. When taken in excessive amounts, particularly in the form of supplements, certain water-soluble vitamins can cause toxic effects. Thus, the potential for toxicity exists, even though it is not common.