Does eating photosensitive food definitely lead to tanning or dermatitis?
Introduction: In daily life, we often hear that some foods should not be consumed before sun exposure, otherwise it can cause tanning or skin inflammation. Is this claim true? Today, the editor will reveal the truth for everyone.
There is indeed a type of "photosensitive dermatitis" that is related to food consumption and sun exposure. Foods that cause dermatitis (such as celery) are called photosensitive foods. However, not everyone who eats celery and then goes out in the sun will have an adverse reaction.
For allergic dermatitis to occur, three conditions must be met simultaneously: first, the individual has a sensitive constitution; second, the person has consumed photosensitive foods; and third, they have been exposed to ultraviolet light (such as from the sun) after consumption.
Experts point out that photosensitive dermatitis is actually caused by an allergic reaction. From a medical perspective, photosensitive foods or their metabolites in the body undergo photochemical changes under the action of light, becoming haptens. After sun exposure, they combine with skin proteins to become complete antigens, which in turn stimulate the body to produce cell-mediated responses. Simply put, it is the simultaneous interaction of the individual's constitution, the food consumed, and ultraviolet light that leads to photoallergy.
Experts emphasize that individuals without allergies will not experience skin discomfort symptoms even after consuming photosensitive foods. Therefore, to prevent photosensitive dermatitis, one should understand whether they are allergic to photosensitive foods. If not, they should limit their intake of such foods or strictly avoid ultraviolet light exposure after consumption.
Experts state that in daily life, the following substances are considered photosensitive:
Photosensitive foods: Bullseye conch, grey amaranth, milk vetch, snow cabbage, lettuce, fennel, amaranth, shepard's purse, celery, radish leaves, spinach, buckwheat, cilantro, milk vetch, rapeseed, mustard, fig, citrus, lemon, mango, pineapple, etc.
Fragrances in cosmetics: Bergamot oil, lemon oil, sandalwood oil, musk, ambergris, etc.; and sunscreens containing light-absorbing agents.
If you are unsure whether you are allergic to the substances listed above, or if you are unsure whether you have a sensitive constitution, or if you have been exposed to a large amount of the above items, the best preventive method is to avoid direct sun exposure.
When you develop a polymorphic rash with symptoms such as erythema, papules, and blisters, these are signs of photosensitive dermatitis. In that case, think carefully about what you have eaten, and avoid sun exposure after consuming such foods in the future.