A Critical Appraisal of Strategies to Optimize Vitamin D Status in Germany, a Population with a Western Diet.

Nutrients · 2019 · PMC6893762 · PMID 31698703

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highly significantno p-value reported

However, a recent investigation showed that the use of sunscreens with sun protection factor (SPF) 15 and a high UVA-protection factor applied at sufficient thickness still allows a highly significant improvement of serum 25(OH)D concentration [ 121 ].

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