Vegetables are an important part of our diet because they supply a wide variety of essential nutrients. They are our major sources of vitamins A and C and are rich in many other vitamins and minerals. Unfortunately, many of these nutrients are easily lost.
Six factors are responsible for most nutrient loss:
- High temperature
- Long cooking
- Leaching (dissolving out)
- Alkalis (baking soda, hard water)
- Plant enzymes (which are active at warm temperatures but destroyed by high heat)
- Oxygen
Some nutrient loss is inevitable because it is rarely possible to avoid all of these conditions at the same time. For example: