Absorption rates depend on your method of consumption. If you eat a product, it must travel through your digestive tract. Depending on your own personal metabolism and if you have eaten a meal recently, this can be quite slow, possibly taking anywhere from 45 to 90 minutes as it must pass through the digestive system and be absorbed by the liver. Take this into consideration when determining if you should consume more of the product. Perhaps wait a few hours to see if your absorption rates are slow