If you're supplementing vitamin D, might be worth checking out riboflavin (vitamin B2) too: > Flavin-dependent monooxygenases and oxidoreductases are located a

If you're supplementing vitamin D, might be worth checking out riboflavin (vitamin B2) too: > Flavin-dependent monooxygenases and oxidoreductases are located at critical branch points in the biosynthesis and metabolism of cholesterol and vitamin D https://academic.oup.com/advances/article/5/2/144/4557968 https://academic.oup.com/advances/article/5/2/144/4557968