Which of the following is NOT a nutrient for the brain?

Protein is indeed a crucial nutrient for overall health and plays many roles in the body, including the brain. Its amino acids are essential for the synthesis of neurotransmitters, which are critical for communication between nerve cells. However, when considering nutrients specifically recognized for their direct contribution to brain health and function, protein may not be as distinctly categorized as the other options listed.

Antioxidants, photochemicals, and omega-3 fatty acids are recognized for their direct benefits to brain health. Antioxidants help protect brain cells from oxidative stress, which can lead to cognitive decline. Photochemicals, found in fruits and vegetables, can also offer protective effects against neurological disorders and promote cognitive function. Omega-3 fatty acids, particularly DHA, are integral to maintaining the structure of brain cells and supporting cognitive functions.

Therefore, while protein is essential for a multitude of biological functions, the question focuses on nutrients that are particularly vital for brain health. This distinction places protein in a different context compared to the other options.