Tips from Dr Marilyn Glenville If like me, you were feeling virtuous by eating lots of spinach, it appears that where this particular vegetable is concerned you can have too much of a good thing. One if the biggest risks for women post menopause is osteoporosis. There are a number of risk factors for osteoporosis that apply whatever your age, but the emphasis for preventing and treating osteoporosis is to make your diet more alkaline. Calcium  neutralises acid, so the more acidic your food, the more calcium has to be taken from your bones to make your body  more alkaline. The more fruit and vegetables you eat the more alkaline your body becomes and there will be less loss of calcium from your bones. However, both spinach and rhubarb contain oxalic acid, which reacts with calcium in the digestive system and stops it being absorbed, so if you have osteoporosis...