Over 70% of Americans take some form of dietary supplement every day, and the
supplement industry is currently big business, with a gross of over $28 billion. However …

Retinoids (vitamin A) are crucial for most forms of life. In chordates, they have important roles
in the developing nervous system and notochord and many other embryonic structures, as …

A review of the literature concerning the design, utilisation and validation of food-frequency
questionnaires (FFQ) has been carried out using a semi-systematic approach to obtaining …

Hippocrates, a philosopher who lived from 460 to 359 BC is often quoted as saying,“Let your
food be thy medicine and your medicine be thy food.” Having lived just shy of a century at a …

Vitamin D sufficiency is required for optimal health. The conditions with strong evidence for a
protective effect of vitamin D include several bone diseases, muscle weakness, more than a …

Osteoporosis is a complex, multi-factorial condition characterized by reduced bone mass
and impaired micro-architectural structure, leading to an increased susceptibility to fractures …

The acute and chronic effects of vitamin A toxicity are well documented in the literature.
Emerging evidence suggests that subtoxicity without clinical signs of toxicity may be a …

ContextAlthough vitamin deficiency is encountered infrequently in developed countries,
inadequate intake of several vitamins is associated with chronic disease. ObjectiveTo review …

Vitamin A is a fat-soluble micronutrient essential for growth, immunity, and good vision. The
preformed retinol is commonly found in food of animal origin whereas provitamin A is …

Osteoporosis is a major public health problem, affecting millions of individuals. Dietary
intake is an important modifiable factor for bone health. Inadequate intake of nutrients …