Researchers commissioned by tanning brand St. Tropez claim that women look their oldest at 3:30 p.m. every Wednesday — because that's when work stress peaks, energy levels plummet, and any sleep deprivation and alcohol consumption from the weekend catches up with us.

"Processing the toxins in alcohol and sugar can put strain on the body," says Nichola Joss, St. Tropez skin expert. "It can take up to 72 hours for the visible effects of alcohol to show, so the effects of drinking on the weekend may not present themselves until Wednesday afternoon."

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