A -orange or red foods.  Apricots, carrots, peppers, sweet potato, squash.  Also dairy, eggs, oily fish, (famously) liver.

B1 (thiamine) – deficiency causes several different syndromes including Wernicke’s encephalopathy (confusion, ataxia, ocular) and dry (peripheral neuropathy) or wet (cardiac failure) beri-beri. Depends on chronicity.  Classically alcoholism or diet dependent on polished rice. Bread has it!

B6 – fish, potatoes, fruit, fortified breakfast cereal.

C – citrus, blackcurrant, kiwi, berries.  Also peppers, broccoli, Brussel sprouts, potatoes.

B12 – see Vitamin B12.  Found in fish, meat, eggs, milk, fortified breakfast cereal, yeast extract (Marmite).  So a major issue for vegans.  Deficiency classically causes macrocytic anaemia.

Curiously, teenagers often seem to have high levels in my experience.  Apparently this can be a flag for some nasties, namely malignancies, liver and kidney diseases, and can then be accompanied by symptoms of deficiency, due to disrupted pathways…  [QJM 2013]

E – nuts and seeds.

K – green leafy veg.

Folate (folic acid) – green leafy vegetables, broccoli, brussel sprouts.  Oranges, wholegrain cereals, nuts and pulses (peas, chickpeas, kidney beans)