Oh lord, not another "wellness hack". And here comes the people giving themselves kidney stones and spinal cord problems to be featured on Chubbyemu.
Growing up and recently, I've been anemic (iron deficient) without any obvious medical cause. That requires supplementation with an unusual amount of iron.
Also, I'm vitamin A deficient at baseline and have to take large amounts, around 15k IU/day, to stay within the "normal" range. (50% above ordinary UL.)