> An adult in a bathing suit exposed to 1 minimal
erythemal dose of ultraviolet radiation (a slight pinkness to
the skin 24 h after exposure) was found to be equivalent to
ingesting between 10,000 and 25,000 IU of vitamin D
(Fig. 6).
Doesn't say 30 minutes, but it may be 30 minutes depending on your skin colour and the local strength of the sun.
I think the OP's interpretation of this is wrong. Just because someone was found to have an equivalent of ingesting so and so much, after UV radiation, doesn't automatically imply that it a good idea to ingest any amount of vitamin D. Ingestion is different from exposing skin to UV/sun. The paper probably doesn't state, that ingesting that much will make a person absorb that much from that ingestion, nor does it state, that ingesting some equivalent amount will be safe and without side-effects.
So the paper may be well researched or whatever, but the interpretation of it is questionable.
poizan42|1 month ago
> An adult in a bathing suit exposed to 1 minimal erythemal dose of ultraviolet radiation (a slight pinkness to the skin 24 h after exposure) was found to be equivalent to ingesting between 10,000 and 25,000 IU of vitamin D (Fig. 6).
Doesn't say 30 minutes, but it may be 30 minutes depending on your skin colour and the local strength of the sun.
zelphirkalt|1 month ago
So the paper may be well researched or whatever, but the interpretation of it is questionable.