Spectrophotometry assesses the intensity of light after going through a sample, to measure the light absorption or the quantity of chemicals in a solution (Spectrophotometry, 2013, Spectrophotometry, 2020)
In the liver, the 25-hydroxylase enzymes (CYP2R1 and CYP27A1) convert inactive cholecalciferol to 25(OH)VD 3 (calcidiol) by carbon 25 hydroxylation 14
Dosage Gary Brecka uses 10X Optimize, a methylated multivitamin, and prefers two tablets per day (source)
Developed to reduce the visibility of stretch marks with first visible results in only 2 weeks***, the concentrated oil-serum formula works from day 1 and is effective on stretch marks caused by pregnancy, hormonal & weight changes, including older stretch marks
While topical treatments can help, true radiance starts from within