Guaraná extract effectively reduces oiliness in skin and hair without harming skin health.
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February 2000 in “International Journal of Dermatology” Hepatitis C and alcohol abuse may lead to porphyria cutanea tarda.
September 2014 in “Emergency Medicine News” The man's skin condition improved with sun protection and topical steroids, but UV exposure still caused flare-ups.
January 2011 in “Journal of the American Academy of Dermatology” Finasteride may cause pseudoporphyria, a blistering skin condition.
Bovines can have rare inherited skin diseases with specific symptoms like hair loss, fragile skin, and abnormal porphyrin buildup.