"critical periods" - a finite period during development in which certain events may occur that will

have irreversible effects on later developmental stages. -nutrients during period must be supplied on

time for organ to reach full potential

"It is better to get vitamins from food than from supplements." - Supplements can cause toxicity.

Multiple nutrients in food; not just one

"no level of alcoholic beverage intake is safe or advisable during pregnancy." - -alcohol crosses the

placen...
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