High weekly doses of vitamin D (e.g., 20,000-50,000 IU) are less likely to show significant variation in supplement concentration and may be absorbed slightly better.

“the higher the vitamin D dose the more bioavailable it is”

“If you're doing a weekly dose that's really, really high, so if you're doing like 20,000, 50,000 IU a week, you're much less likely to have that huge variation in the concentration of the vitamin D supplement like for some reason. It seems to be absorbed a little bit better too.”