The corpus luteum secretes the hormones estrogen and progesterone, preparing the body for the possibility of conception. If conception does not take place, the corpus luteum diminishes, leading to a drop in progesterone and estrogen. This drop leads to menstruation, and the reproductive cycle starts over again.
Corn, lentils, winter squash and olives are all vegetables that are high in acid. For example, corn has a pH of 5.2, while lentils and olives have pH levels of 6.3 and 6, respectively. They still have fiber and other nutrients, but they are not good choices if you are trying to lower the levels of acid in your body.
Acid foods are foods that contain enough acid to have a pH of 4.6 or lower. Acidic foods can be processed safely in a boiling water canner, usually without added acid (lemon juice, vinegar or citric acid).oods can be acid because they are: 1  naturally acid foods. 2  foods that have acid, such as vinegar or lemon juice, added. 3  fermented foods, such as sauerkraut.