While dairy may be a popular choice for ketogenic diet food options, not everyone has the stomach for cheese, milk, and heavy cream. Studies suggest that approximately 65% of the world population does not produce enough lactose, the enzyme needed to properly digest dairy products. This can result in stomach cramping, bloating, and diarrhea. Thankfully, there are a variety of milk alternatives that are high in fat and protein while low or absent in carbohydrates. Next time you’re prepping a collagen shake, try one of these ketogenic milk alternatives.