Nothing wrong with lactose, even with intolerance it's just unpleasant not unhealthy. It would be good if vit d is in many more things but don't understand why

Nothing wrong with lactose, even with intolerance it's just unpleasant not unhealthy. It would be good if vit d is in many more things but don't understand why it's milks job. Good grass fed butter has some vitamine d. But most natural food sources will have limited vit d.