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.
6 of 7. #5: Milk. Last, but probably the most obvious source of calcium, is milk. 8 oz of non-fat milk will give you 299 mg of calcium and 30% of your daily value. 7 of 7. #6: Other non-dairy sources. Other non-dairy sources high in calcium include Chinese cabbage, kale, broccoli, tofu, and salmon.