Complex sentence: They are regarded as appropriate for all stages of the life-cycle by the American Academy of Nutrition and Dietetics, while the German Society for Nutrition does not recommend vegan diets for babies, children and adolescents, and during pregnancy and lactation.
Split into simpler sentences: They are regarded as appropriate for all stages of the life-cycle by the American Academy of Nutrition and Dietetics. The German Society for Nutrition does not recommend vegan diets for babies, children and adolescents, and during pregnancy and lactation.