Ingredient amounts for Nutrafol supplement products are determined by rigorous research at the ingredient level to select serving sizes that appropriately address key root causes. Some nutrients are included in our products above 100% Daily Value since we utilize research specific to addressing root causes—this is slightly different than if we look at recommended daily values to maintain health, as put out by the US FDA.

Additionally, each formula undergoes a safety evaluation to validate that nutrient and ingredient limits are within range for long-term use.