FWIW my sister had regular sunlight therapy for hers as a teenager, it sounded essentially like a tanning bed at the dermatologists office but probably had part

FWIW my sister had regular sunlight therapy for hers as a teenager, it sounded essentially like a tanning bed at the dermatologists office but probably had particular settings or something. She also used a product called Coal-tar shampoo and skin lotion, not sure if she still does (hers has reduced a lot as an adult). I don’t recall vitamin D directly ever being part of her treatment.