Abstract
THE relative importance of the two alternative sources of vitamin D, endogenous skin synthesis by the action of solar ultraviolet rays and dietary ingestion, is uncertain in Britain. In the past, classical rickets was common in springtime but rare in autumn1,2, suggesting that summer sunshine was an important source of vitamin D. Seasonal variation in plasma antirachitic activity has been detected in more southerly latitudes in the United States, using bioassay techniques3, but data from Britain are scanty and some workers have considered the effects of sunshine to be minimal in this climate4. Possible age or sex differences in vitamin D nutritional status are also unknown.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
