A mainstay of the Asian diet that is a good source of protein is

A. The duodenum is the first part of the small intestine but is not the primary site for vitamin B12 absorption. It's primarily absorbed in the lower part of the small intestine called the ileum.
B. While the stomach plays a role in releasing intrinsic factor that aids in B12 absorption, the actual absorption occurs in the small intestine, particularly the ileum.
C. Vitamin B12 absorption primarily occurs in the lower part of the small intestine, facilitated by intrinsic factors.
D. The large intestine is mainly responsible for water absorption and electrolyte balance, not vitamin B12 absorption.

A. Lactose intolerance is more related to the absence of the enzyme lactase, commonly found in individuals who have a reduced ability to digest lactose (milk sugar), regardless of their dietary choices.
B. Vegan diets may lack sufficient iron intake as plant-based sources of iron (non-heme iron) are not as readily absorbed by the body compared to heme iron found in animal products. This can put vegans at a higher risk of iron deficiency.
C. Diabetes risk is influenced by various factors, including genetics and lifestyle, rather than specifically by following a vegan diet.
D. Pneumonia risk is not directly associated with following a vegan diet but can be influenced by overall health, immune function, and exposure to pathogens.