Home Health Vitamin D overdose warning: How you can actually take too much of... Health Vitamin D overdose warning: How you can actually take too much of something so good July 7, 2022 127 0 FacebookTwitterPinterestLinkedin The middle-aged patient, from Kent, lost two stone in three months after suffering from constant vomiting, diarrhoea and stomach pains. He had been taking a cocktail of supplements.