My daughter is 7 months pregnant and the corners of her mouth are so cracked that the skin is growing back crooked. I'm concerned that she has a vitamin deficiency, although she takes vitamins. If not, she could have a riboflavin deficiency. If she is taking prenatal vitamins, she is probably getting folacin , iron and vitamin C only. I would recommend your daughter see a dermatologist as well as she may have an infection which should be treated even if she is pregnant.
Human milk is perfect for little humans whereas cows milk is better for little cows.
The American Academy of Pediatrics now recommends breast feeding for the first year of life. The only thing that works for me is red meat and liver. Yes, eat red meat i.e. beef and especially liver. Don't know what you mean by waste concentration, as liver is where your body stores fat soluble vitamins. It is a very nutritious food to eat.