UPF

American  

abbreviation

1. ultraviolet protection factor: the effectiveness of clothing fabrics in protecting the skin from the sun’s ultraviolet UVA and UVB radiation, rated on a scale of increasing protectiveness, the number being the ratio of the radiation dose needed to produce minimal redness when wearing the fabric compared to the dose needed to produce the same redness when not wearing it.

   A shirt with a UPF of 50 will reduce your ultraviolet exposure by 50 times (98% UV blockage).

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Etymology

Origin of UPF

First recorded in 1985–90

Example Sentences

This is where UPF subcategories and better nutrition education could be helpful.

From MarketWatch

A watered-down definition, meanwhile, could end up allowing certain ultraprocessed foods to fly under the radar, especially if food companies find a way to get around whatever UPF definition or label is proposed.

From MarketWatch

RFK Jr. made his announcement that a UPF definition is coming not at a press conference, but during an appearance on Joe Rogan’s podcast.

From MarketWatch

But to bring about meaningful changes in the way Americans eat and how our food environment affects public health, the new UPF definition must be clear, specific and carefully thought out — with input from respected nutrition experts.

From MarketWatch

A UPF definition is long overdue.

From MarketWatch