Vitamin D daily recommended intakes (RDI) should be doubled from 10 to 20 μg/day, for the entire population, the Norwegian Scientific Committee for Food Safety (VKM) has concluded.
Currently Norway recommends 10μg/day for children above two years, adolescents and adults, and 20μg/day for over-75s – but less than 50% achieve those recommendations.
“To ensure intake of 20μg vitamin D per day in elderly, a daily dosage of 20μg from food supplements is justified,” wrote the VKM.
“If the maximum limit for vitamin D in supplements is increased to 20μg per daily dosage, all age groups including elderly above 75 years can cover the recommended intake without any risk of exceeding UL.”
The NSFA added that the minimum for vitamin D supplements should be evaluated.
The maximum permitted limit (MPL) for vitamin D is 100μg/day for children and adolescents above 10 years and adults, and 50μg/day for children 1-10 years.
Vitamin A (retinol)
The agency also evaluated vitamin A and found the RDI should remain the same at 900μg and 700μg/day for men and women, respectively, and between 350μg/day and 600μg/day for children and adolescents.
The MPL for retinol is 3000μg/day for adults and between 1100μg/day and 2600μg/day for children and adolescents.
“The existing maximum limit for vitamin A in food supplements exceeds the recommended intakes in all age groups, and some age groups already have an intake of retinol that exceeds the [MPL],” wrote the VKM.
“In all of the investigated population groups except for women, the intake in the 95th percentile without supplements would exceed the [MPL] if 1500μg retinol (the existing maximum limit for vitamin A in food supplements) is added to the intake.”
“Furthermore, because of the risk of exceeding an intake associated with increased risk of osteoporosis, it is concluded that the maximum limit for vitamin A in food supplements should not be increased.”