Countless Americans frequent their local CVS and other stores to replenish their supply of vitamins and supplements. These products constitute a daily health routine for many individuals, aiding in promoting a healthier and longer life. However, experts caution that certain vitamins and supplements require close monitoring, as excessive intake can lead to potentially harmful side effects, including vision impairment or liver damage.
One such vitamin to be cautious of is niacin, also known as vitamin B3, which is vital for nervous system function and metabolic support, aiding in converting food into energy. Niacin is crucial for cellular function and development, and there’s evidence suggesting its role in promoting heart health. Some doctors prescribe niacin alongside statins for individuals with high cholesterol. This has led to niacin being marketed as beneficial for heart health, prompting many to self-medicate with the vitamin, which can pose risks if not supervised by a doctor.
However, excessive niacin consumption can be toxic. The recommended daily allowance for women is about fourteen milligrams, yet popular supplements can provide up to 500 milligrams daily, potentially leading to toxicity.
A case study from New York documented a 61-year-old man who experienced sudden blindness, later attributed to excessive niacin intake. The patient had been consuming between three and six grams of niacin daily for several months to self-treat high cholesterol. Doctors diagnosed him with niacin-induced maculopathy, which damaged his retina. Fortunately, ceasing niacin intake led to vision improvement.
Exceeding the recommended niacin dosage, such as 1,000 milligrams daily, can result in various health issues, including dizziness, headaches, low blood pressure, high blood sugar, heartburn, stomach pain, and nausea. Higher doses may cause muscle damage, stomach ulcers, and potential liver damage.
While niacin intake is essential for health, excessive consumption can be harmful. It’s crucial to adhere to recommended dosages when taking niacin or vitamin B3 supplements.