Advertisment Understanding the Risks Dr. Balwi has pinpointed several vitamins and minerals whose overuse could precipitate hair-related issues, including thinning, breakage, and loss . Conditions like 'telogen effluvium, a form of temporary hair shedding have been directly linked to the overconsumption of certain supplements . Symptoms of toxicity can range from nausea and vomiting to more severe consequences like blurred vision .