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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.