MoneySavingExpert (MSE), the consumer website founded by Martin Lewis, has urged shoppers to check the reverse of sunscreen bottles for a crucial number that can help save money. The tip, shared in a previous Instagram post, highlights the 'period after opening' (PAO) number, which indicates how many months the sunscreen remains effective after first use—typically 12 or 24 months.
How the PAO Number Saves Money
MSE explained: "If you turn your sunscreen around, on the back you should find the 'period after opening' (PAO) number. This number tells you how many months it should still protect you after you first use it, usually 12 or 24 months." By knowing this, consumers can determine if leftover sunscreen from previous years is still effective, potentially saving money on repurchases. MSE also suggested writing the opening date on the bottle to track expiration, and noted that expired sunscreen can be repurposed as body lotion.
Heatwave Context
The tip comes as the Met Office issued a red Extreme Heat warning for Wednesday and Thursday, with temperatures forecast to reach 37°C in southern England. The NHS emphasises that sunburn increases skin cancer risk and can occur even on cloudy days in the UK. The health authority advises seeking shade between 11am and 3pm from March to October, using at least SPF 30 sunscreen, and reapplying frequently. Sunscreen should be stored in a cool, dry place away from direct sunlight.
Expert Advice on Sun Protection
The NHS warns: "There's no safe or healthy way to get a tan. A tan does not protect your skin from the sun's harmful effects." They recommend balancing sun protection with vitamin D intake and not relying solely on sunscreen—covering up with clothing and sunglasses is also crucial. MSE's simple tip helps ensure sunscreen is used effectively, especially during extreme heat events.
