Topical vitamin D might be more bio-available than oral
Yet another group feels that topical vitamin D is better than oral
Both of their references are on VitaminDWiki
This is not the current consensus opinion, but may be correct
See also VitaminDWiki
* Topical Vitamin D
* Topical Vitamin D provides more benefits than oral sometimes - many studies
* Search VitaminDWiki for TOPICAL 404 items as of Oct 2015
* Spray vitamin D inside cheek in case of emergency Feb 2013
* Fastest inside cheek, fast sub lingual, slowest (~12 hours) oral
* Topical vitamin D raised blood level to 38 ng (used Aloe Vera gel) – RCT March 2014
TRANSDERMAL VS ORAL VITAMIN D ABSORPTION Health Cloud
The following are the graphics from a 2-3 page article
From Reference #1
Article has the following chart, but does not seem to tell where it came from
References
1. Ruth E. Grossmann. (2010). Evaluation of vehicle substances on vitamin D bioavailability: A systematic review. Mol Nutr Food Res. 54 (8), 1055-1061. in VitaminDWiki Review of bioavailability of vitamin D - oil aprox 2 ng per 100 IU Sept 2010
2. Mir Sadat-Ali. (2014). Topical Delivery of Vitamin D3: A Randomized Controlled Pilot Study. Int J Biomed Sci. 10 (1), 21-24.