Vitamin deficiencies may have specific effects on mental states. These are detailed below:
* Vitamin C: generalised depression, extreme tiredness, outbursts of hysterical behaviour. Vitamin C can be found in oranges, kiwi fruits, broccoli, blackcurrants and potatoes, red pepper, parsley, green leafy vegetables (especially kale), green pepper, tomato puree, brussels sprouts, cauliflower, cabbage (especially savoy), strawberries, watercress, spinach, grapefruit, melon (all types), peas, raspberries, spring onions, swede and turnip, tomatoes.
* Vitamin B12: general mental deterioration; psychotic behaviour, depression, loss of memory and paranoia. Vitamin B12 can be found in cheeses (especially cheddar, parmesan and edam), fortified yeast extract such as marmite, cottage cheese and milk.
* Vitamin B1 (thiamine): depression, irritability, loss of memory, loss of concentration and exhaustion. Sources of Vitamin B1 include breakfast cereals, peas, sunflower seeds, millet, wheat germ, sesame seeds, soy beans, nuts (especially brazil, cashew nuts, almonds and walnuts), legumes (especially split peas, blackeye beans, kidney beans, lentils, chick peas), whole grains (especially brown rice and oatmeal), whole wheat, rye and potatoes.
* Vitamin B6 (pyridoxine): Psychosis, mental deterioration and depression. Sources of Vitamin B6 include wheat products (especially wheatgerm and oatmeal), nuts (especially walnuts), legumes, (especially soy beans, lentils, butter beans, haricot beans), barley, bananas, peanuts and peanut butter, avocados, buckwheat, wheat and rye, raisins and brussels sprouts.
* Folic Acid: fatigue, irritability, insomnia, forgetfulness and confusion. Folic Acid can be found in dried baker's yeast, fortified yeast extract such as marmite, blackeye beans, kidney beans, endive, broccoli, legumes (especially chickpeas), soy beans, vegetables (especially spinach, brussels sprouts, spring greens, okra, cabbage), almonds, beetroot, parsnips, walnuts, oatmeal, brown rice, corn (on cob).
* Vitamin B3 (niacin; niacinamide): loss of memory, mood swings, depression and anxiety. Sources of Vitamin B3 include fortified yeast extract (such as marmite), brewer's yeast, peanuts and peanut butter, sesame seeds, brown rice, wholemeal flour, wheatgerm, wholemeal spaghetti, wholemeal bread, barley, legumes (especially split peas) and cheeses (especially parmesan, cheddar and blue cheeses).
* Biotin: severe lethargy, depression and constant sleeping. Biotin can be found in eggs.
* Pantothenic Acid: insomnia, fatigue, depression and psychosis. Sources include broad beans, peanuts and peanut butter, legumes (especially split peas and soy beans), buckwheat, mushrooms, nuts (especially cashews and hazelnuts), avocados, broccoli and oatmeal.