Initially, eating at a abnormal time disrupts the biological clock of the skin, that includes the daytime potency of an enzyme that creates a protection against the harmful ultraviolet radiation of the sun.
This is what clarified through a study in mice from the O’Donnell Brain Institute and UC Irvine.
Dr. Joseph S. Takahashi, Chairman of Neuroscience at UT Southwestern Medical Center’s Peter O’Donnell Jr. Brain Institute said in a research that people who eat late at night may be more vulnerable to sunburn and longer-term effects such as skin aging and skin cancer.
As well, Dr. Takahashi, also an Investigator with the Howard Hughes Medical Institute said that this result is surprising and he don’t think the skin was paying any attention to during people eating.
Exposing to ultraviolet B damages the skin
The study showed that when the mice were given food only during the day, which is the abnormal eating time for the nocturnal animals, they sustained more skin damage during exposing to ultraviolet B (UVB) light during the day than during the night.
Potentially, that outcome occurred because an enzyme that repairs UV-damaged skin — xeroderma pigmentosum group A (XPA) — shifted its daily cycle to be less active in the day.
It’s clear, there were no altered XPA cycles on the mice which were fed only during their usual evening times and were less susceptible to daytime UV rays.
If someone has a normal eating schedule, then he will be better protected from UV during the daytime. Besides, if someone has an abnormal eating schedule, that could cause a harmful shift in his skin clock, like it did in the mouse.
In addition to disrupting XPA cycles, changing eating schedules could affect the expression of about 10 percent of the skin’s genes.
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The links between eating patterns and UV damage in people
So on, the links between eating patterns and UV damage in people need more researches to be better understood, particularly how XPA cycles are affected.
It’s really important to be mentioned that the time of day food is eaten is more critical to weight loss than the amount of calories ingested, this is according to some scientists’ studies.
It’s hard to translate these findings, clearly, to humans at this point, but it’s fascinating to some researchers that the skin would be sensitive to the timing of food intake.
In this regard, some studies have demonstrated strong roles for the body’s circadian rhythms in skin biology. But little had been understood about what controls the skin’s daily clock.