Vegetables commonly consumed in Thailand were analyzed for their vitamin C, tannin and total phytate Three conventional household cooking methods, namely blanching, boiling and stir-frying, were used to evaluate the effects of cooking. were determined using Vitamin C and tannin content were analyzed spectrophotometrically. Vitamin C content for raw and cooked vegetables ranged from 0.5–83.6 to
0.2–70.8 mg/100 g, respectively.