yes brittle nails is a sign of inadequate nutrition along with thinning hair low body weight irregular or missed periods and always feeling cold. her diet does not sound adequate in fat or calories. it sounds like your daughter needs help before she would even consider having another child. maybe now that she is older and is a mom she can see the benefit of getting help. so i highly recommend encouraging her to go for treatment. for more on signs of an eating disorder/malnutrition see this webmd article.
finger tips crack/malnutrition? . my daughter has had problems with eating disorders for at least 15 years. her hair is getting thin and i wondered if the cracking of her finger tips could be a sign of not enough fat in her diet. she eats only about 3-5 grams of fat per day on an average. she is 32 years old. periods late. she did have a healthy child 3 years ago but has been unable to conceive again. she doesn't binge and purge. she's 5'5" and about 105 lbs. we had her at counseling when she was a teen but nothing works.