While many top-performing teeth whitening treatments can be pricey, and cheaper alternatives may contain chemicals that lead to sensitivity and enamel damage, customers have been singing the praises of . These strips are said to transform smiles on a budget, without any unpleasant side effects.

The is gentle on enamel and promises zero sensitivity - a common problem with many other products. The professional slip-free whitening strips are designed to tackle even the most persistent stains, said to eliminate '14 years' worth of stubborn coffee, wine and nicotine stains, while brightening your smile eight times over.

Usually retailing at £25.99, these whitening strips are currently available on for a limited period. Each box contains 21 treatments, which equates to 95p per session, making it a cost-effective method to achieve professional-grade results at home.

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Simple and straightforward, every box comes with 42 strips - or 21 pairs - a mouth opener, easy-to-follow instructions, and a progress guide to monitor your transformation. After brushing and drying your teeth, you simply apply the strips and leave them on for between 30-60 minutes a day, with users reporting they saw results 'immediately',

The strips have earned a stellar 4.5-star rating from over 1,700 reviews, with customers lauding their effectiveness and value for money. A pleased customer said: "I love the whitening strips. I used to use poladay through my dentist, which was costly - but I get great results with these strips for much less money.

"I have now converted my fiancé, so he's using my strips too! We are getting married in June and I'm determined his smile will be as white as mine." Another buyer added: "The strips are easy to use and the instructions clear. I have definitely noticed a change in my teeth colour.

"These strips have given me back my confidence when I smile. Sometimes, it's just the smallest things that make the biggest difference."

However, one shopper gave only two stars and criticised the product's design: "These seem to do an okay job of lightening. However, the strips are very long and thin, making them difficult to apply without the end folding up on themselves. Also, unlike a different brand I've used, there isn't a shaped piece for the lower teeth, which again, makes it hard to get into place."

Nevertheless, many found them superior, with a satisfied user commenting: "These are the best whitening strips I've found and I've tried lots of different brands. My teeth were noticeably whiter from first use and the effect seems to last longer than others as well. They are easy to use and stay in place after you put them on."

Naturally, there are other teeth whitening strips available for purchase. are sold at Superdrug for £19.99, promising results in 14 days or less - with 28 strips in the packet, it comes to 71p per strip.

Another peroxide-free favourite is MySweetSmile's , priced at £24.99 for 21 treatments. Alternatively, you can buy Dr Dent's affordable, quick and crucially, peroxide-free solution on