NUTR 2050 Lecture Notes - Lecture 19: Ultraviolet, Menarche, Soft Drink
19 Dec 2016
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Ai is critical to ensure peak bone mass. Absorption is highest for females around menarche, for males during early adolescence. ~4 times more calcium absorbed during early adolescence compared to adulthood. Adolescents who do not include dairy should consume calcium-fortified foods. Rda for ages 9-18 years is 1300 mg/day. Soft drink consumption displaces nutrient-dense beverages such as milk and fortified juices. Synthesized by the body via skin exposure to (ultraviolet b rays of sunlight) For females, needs highest after menarche (15mg/day), for males after growth spurt (11mg/day) Rapid rate of linear growth and increase in blood volume. Deficiencies in 9% of 12-15 year old females and 5% of 12-26 year old males. Increases as females get older and prepare for pregnancy. Requirements are 2x those for elementary age. Need to know trends not actual numbers. Males a(cid:374)d fe(cid:373)ales do(cid:374)"t get e(cid:374)ough fibre. Both exceed ul for sodium, especially with males.
