Why do some scientists suggest that the DRI and UL for vitamin D be increased?
What will be an ideal response?
To support the diverse functions of vitamin D, some researchers estimate that the body requires approximately 3000 to 4000 IU (75-100 ?g) of vitamin D daily to maintain optimal blood levels of 25-OH vitamin D3. However, typical inputs from UV exposure (2000 IU), food sources (150-200 IU), and dietary supplements (200 IU) often provide 2400 IU daily or less for the average individual. Thus, an oral intake of approximately 1000 to 4000 IU daily might be necessary to maintain optimal vitamin D status in people who have limited sun exposure.
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____________________ is an estimation of the energy required to process food (digest, absorb, transport, metabolize, and store ingested nutrients);
Fill in the blank with correct word
Jennifer says she drinks bottled water because it is safer than tap water. You tell her that bottled water:
a. has been withdrawn from an underwater spring and is naturally pure. b. has been filtered by the manufacturer to remove contaminants c. all tastes exactly the same as tap water. d. may be treated tap water. e. is a sound environmental decision.
The bioavailability of calcium in calcium-fortified orange juice is comparable to that of milk
a. True b. False Indicate whether the statement is true or false
Phil is a participant in a study designed to examine the effects of taking a dietary supplement on muscle tissue development. Phil suspects he is in the experimental group, because he is certain his muscles are bigger and stronger as a result of taking the product supplied by the researchers. When the study is completed, Phil learns that he did not receive the dietary supplement. Phil thinks the researchers made a mistake-he is certain his muscle mass increased while he took the supplement. According to this information, Phil's belief that his physical condition improved while he participated in the study is an example of ________.
A. participant fatigue B. the placebo effect C. an anecdotal report D. human subject bias