Amazon is not the best place to get supplements. Lots of marketplace sellers, reviews of expired/foul smelling supplements, etc.
Places like Puritan’s Pride or Vitacost...who’ve been selling quality supplements for years, are usually a better choice to order from.
YMMV, tho.
I take a 50,000 unit of Vitamin D once a month due to my thyroid problem. Years ago I took it once a week.