We have carefully designed our vitamin levels based on a combination of the best available evidence, safety, and ability of the body to absorb the nutrient. In fact, the percent daily values set may not align with typical recommendations, either because a level has not been reliably established, or because it is based on outdated RDA (Recommended Dietary Allowance) levels. In our supplements, where the amount of the nutrient exceeds the RDA, it has been safe at the level included.