Hi treis, we're working with one of the world's experts on Vitamin D and using clinical research based on studies conducted on populations over four decades. See one of his publications specifically looking at breast-feeding women and safe <4000 IU figures. http://pediatrics.aappublications.org/content/early/2015/09/...
Regarding the 1,000,000 Vitamin D response: typically our human customers are not 50,000lbs (a blue whale is typically 40,000lbs). However, it's probably not that unforeseeable if a blue whale has higher requirements for Vitamin D than an average human that's 195lbs. To your point though, we are careful that we do not go grossly over Recommended Daily Allowances, and our formulations reflect clinical research.
Regarding the 1,000,000 Vitamin D response: typically our human customers are not 50,000lbs (a blue whale is typically 40,000lbs). However, it's probably not that unforeseeable if a blue whale has higher requirements for Vitamin D than an average human that's 195lbs. To your point though, we are careful that we do not go grossly over Recommended Daily Allowances, and our formulations reflect clinical research.