Consumption of the recommended five or more servings of fruits and vegetables per day provides between 3 and 6 mg of beta-carotene. Supplemental intake of beta-carotene ranges from 3 to 30 mg/day, although medicinal doses to treat erythropoietic protoporphyria or prevent a reaction to sun in patients with polymorphous light eruption range from 30 to 300 mg/day (PDRHealth 2005). The dose
required to provide photoprotection is greater than 24 mg/day for more than 2 months (Sies&Stahl 2004).
To enhance absorption, supplementation should be taken with meals.
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