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.
Vegetables, especially leafy green vegetables, are the most nutrient-dense food source of calcium. The following are the calcium contents for 200 calories worth of common vegetables:n addition to the above mentioned dairy sources, powdered skim milk and pudding are also rich sources of calcium.   Another one of the most beneficial 3 food sources of calcium is fish. Sardines, tuna and salmon are considered to be rich in calcium and provide many health benefits.