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Cutaneous production of vitamin D is strongly influenced by anthropometric variables (body mass index, age, etc.), skin phototype, lifestyle and season [100, 101]
As with any Warning Letter, the FDA notifies the company of its concerns and provides the company an opportunity to address them
Brain: A Journal of Neurology, 120 ( Pt 1 ) , 141157
NMR 55 , 211218 (2013)
Oral formulations are limited by stability and are useful if a stable form is available for gut-targeted effects
doi: 10.1113/jphysiol.2013.255364
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