All citrus essential oils are photosensitizing, so there should be no sun exposure for how many hours after application or ingestion?

All citrus essential oils are photosensitizing, so there should be no sun exposure for how many hours after application or ingestion?

• A. 6hrs
• B. 12 hours
• C. 24 hours
• D. 48 hours

Answer: (B)

Photosensitive risk from citrus essential oils comes from furanocoumarins (psoralens) that can be activated by UV light. After topical application or ingestion, these compounds can be present in the skin for a period, making you vulnerable to sunlight–induced skin reactions. The practical window to avoid sun exposure is about half a day, so roughly 12 hours after using or consuming the oil. Shorter windows may not cover the full absorption and persistence of the photosensitizing agents, while longer windows are unnecessarily cautious.

Photosensitive risk from citrus essential oils comes from furanocoumarins (psoralens) that can be activated by UV light. After topical application or ingestion, these compounds can be present in the skin for a period, making you vulnerable to sunlight–induced skin reactions. The practical window to avoid sun exposure is about half a day, so roughly 12 hours after using or consuming the oil. Shorter windows may not cover the full absorption and persistence of the photosensitizing agents, while longer windows are unnecessarily cautious.