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Milk & dairy products
No. Shellfish are mostly devoid of calcium. The primary sources of calcium are dairy products.
Why would an organic chemist prefer to read primary sources about experiments In her field rather than secondary sources
bone
Yes, butter has calcium, even though you should not use it as a primary source for your calcium.
Dairy products
Rickets in animals is normally as a result of reduced calcium intake and may be termed as primary or secondary. Primary calcium deficiency is lack of calcium in the diet, while secondary calcium deficiency is normally accompanied by vitamin D deficiency because of keeping animals in doors (no sunlight). The following measures may be taken to treat rickets. Administer calcium salts through injections: Supplement the animals with a diet that includes calcium and phosphorous. alfalfa, clover and molasses are good sources of calcium. other sources of calcium and phosphorous are limestone, bone meal and dicalcium phosphate.
Milk & dairy products
No. Shellfish are mostly devoid of calcium. The primary sources of calcium are dairy products.
There are lots of sources of calcium in food. For example the most common sources of calcium in food include yogurt, cheese, milk, juices and soy. If you feel you are not getting enough you can buy calcium supplements.
Parathyroid Hormone.
You ask this like craving milk during menstruation is the norm, which it isn't. Craving particular foods is your body telling you that you need something in your diet, with milk it's obvious that it's calcium and this would make sense as additional calcium is needed during menstruation, but there are better sources of calcium. Change your diet to include more calcium.
no carnivores are not primary sources
Beef liver, spinach, asparagus, and peanuts are all great sources
Calcium The calcium for the eggshell comes from three sources - the diet, special bone called medullary bone (found in the cavity of all birds long bones) of pullets and the hens skeleton. The hen uses approximately 2.5 grams of calcium in the formation of one normal egg. When diet alone cannot supply this amount the calcium will be sourced internally.
Primary sources may require interpretation!
Primary Sources