Scurvy is rare in the United States. Citrus fruits and many other fruits and vegetables, including berries, melons, peppers, many dark-green leafy vegetables, potatoes and tomatoes. Vitamin C intake may cause diarrhea and gastrointestinal discomfort. Use of supplements can also interfere with tests for blood sugar level. Thiamin is a water-soluble vitamin that helps all body cells produce energy from carbohydrates.
Ultraviolet light destroys riboflavin.
It also helps enzymes function in the body. Symptoms include diarrhea, mental disorientation and skin problems. Foods high in protein, such as poultry, fish, beef, peanut butter and legumes, are also usually good sources. Vitamin B6 is a water-soluble vitamin which helps the body make proteins, which are then used to make body cells. Vitamin B6 also helps produce other body chemicals such as insulin, hemoglobin and antibodies to fight infection.