Those that are lactose intolerant can have milk without the lactose in it but those with milk allergies can't have milk at all unless they take some kind of special medication for it.
Breaking the body into systems is in most cases a lot easier for the students to understand instead of just doing it all at once
Answer:
Severe deficiency, called pellagra, can cause symptoms related to the skin, digestive system, and nervous system.
Explanation:
Yes it does but is dangerous
