Opioids are substances that act on opioid receptors to produce morphine-like effects. Medically they are primarily used for pain relief, including anesthesia. Other medical uses include suppression of diarrhea, treating addiction, reversing opioid overdose, suppressing cough, and suppressing opioid induced constipation.
Other foods that are high in calcium include: 1  Spinach. 2  Kale. 3  Okra. Collards. 4  Soybeans. White beans.  Some fish, like sardines, salmon, perch, and rainbow 1  trout. Foods that are calcium-fortified, such as some orange juice, oatmeal, and breakfast  cereal.
Summary of Food Sources. Currently, an estimated 72% of calcium in an average American's diet comes from dairy foods. Vegetables (7%), grains (5%), legumes (4%), and meat/fish (3%) also contribute to total calcium intake.any foods that contain calcium also contain vitamin D. For example, two of our top calcium-containing WHFoods (sardines and cow's milk) also belong to our top vitamin D-containing WHFoods.