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Processed meats, biscuits, fizzy drinks, ice cream and some breakfast cereals are examples of UPF, which are becoming increasingly common around the world.

"Many UPF tend to be high in these nutrients," she says, adding that studies to date haven't been able to prove that the effects of UPFs are due to anything more than "diets high in foods which are energy dense and contain large amounts of fat and sugar".

One study, Teegarden pointed out, found a correlation between UPF consumption and accidental death — a statistical oddity that likely indicates residual confounding rather than causation.

Yet even after accounting for factors such as body mass index, age, alcohol use and comorbidities, researchers found the association between UPF consumption and active psoriasis remained strong.

The hoodie offers UPF 20+ sun protection and has a jersey-like breathable fabric.