An individual with Vitamin B deficiency may have chronic fatigue or even anemia, diarrhea and other gastrointestinal issues, experience mental exhaustion or cloudiness, irritability, anxiety, and depression.
Vitamins are found in a wide variety of foods, including in most animal meats and by-products, and in dark, leafy greens and whole grains. Key sources of Vitamin B include red meat, fish and shellfish, eggs, cheese, dairy milk, legumes, citrus fruits, whole grains, and fortified cereals.