Stuck at K: we know very little about vitamins except that they’re good for us (in small quantities)

Before I read this book about vitamins, I thought I knew what it would be like. It would be vaguely reassuring. It would tell me that I was consuming the right vitamins, but perhaps in the wrong quantities. Medically speaking, I expected it to point me in a certain direction. There would be chapters about scurvy and beriberi, and how these diseases can easily be cured, now we know about vitamins. There would be stuff on cancer. For a while, I would eat a lot of carrots.

Well, I was partly right. Catherine Price, a fastidious reporter, has given us the stories of scurvy and beriberi, and how these scourges were cured with vitamins. She also tells us about night-blindness, a condition that can make your eyes develop ulcers, but that can be cured with small doses of vitamin A. But, it turns out, this isn’t
 a book about how marvellous things are, now we know about vitamins.