best vitamins for hair growth
best vitamins for hair growth
Hair growth supplements can help, but mainly when a documented nutrient deficiency (vitamin D, iron, zinc) is driving hair loss. This dermatologist-informed guide breaks down the nutrients with real evidence, effective dosages, safety risks, and realistic 3-6 month timelines. It also explains when supplements won't work, how to choose third-party tested products, and which proven treatments outperform any pill.