You can take in fats with your whey and it will slow down to be almost the same as casein. Personally casein digests so slow the Lucien in it that triggers protein synthesis in your body, never hits 3grams (the level needed to trigger it) so I will keep to the whey. Are you sure the results ain't due to nutrition changes or hitting the weights more intense? Gains like that can not what so ever be contributed to 1 change.
