All types of cookers destroy or damage the nutrient content in the food to some extent. But pressures cookers preserve the nutrients up to 95% that no other type of cookers can. Compared to steaming, frying, roasting, or general boiling, cooking is better in terms of nutrient retention, digestion. With a pressure cooker, the anti-oxidant activity is increased destroying the antinutrients. So, a pressure cooker does not destroy the nutrients. Instead, it retains and makes the food healthier for consumption.