Beauty buffs are raving over a £20 teeth whitening powder that works even on the most sensitive of teeth, and is even loved by dentists. It's said to brighten your teeth and get rid of stains caused by coffee, tea, fizzy drinks, red wine and smoking.

MySweetSmile's Teeth Whitening Powder usually costs £24.99, but you can get it for cheaper on Amazon right now as they have reduced it in their spring sale. It's £5 off in the latest deal meaning you can get a six month supply of the powder for just £19.99.

The powder has a refreshing mint flavour and is said to leave mouths feeling fresh and clean. It's made using dentist approved Pentasodium Triphosphate that whitens without damaging your teeth as it doesn't contain any harmful peroxides, making it work even if you have sensitive teeth.

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It's pulled in over 1,700 five star ratings on the shopping giant's website. One shopper said: "I love looking at my teeth now and I’ve only used three times! My teeth were stained from all the tea I drink and I use to smoke, hadn’t whitened since.

"I used this product for literally ten minutes with my electric toothbrush and spat rinsed and dipped again, rubbing the brush gently up and down my teeth carefully whilst polishing and looking in the mirror. My teeth at visibly whiter and I used my normal toothpaste after. Even if they stay at this brightness I’d be impressed! What an excellent product."

A second penned: "I have been bleaching my teeth at home for years, initially with my dentist, topping up 2-3 times a year for a few hours over approx 3 days using 22% carbamide peroxide. I’ve never really liked the thought of using and inevitably swallowing a tiny bit of this product but liked the end result.

"Saw an advert for this powder and read the reviews so thought I’d give it a go…….I am AMAZED at the results, although my teeth were fairly white before they were getting close to needing a CP top up as I noticed a very slight discolouration.

"Have used this powder once a day for 4 days, and will do it for a week, the difference is incredible and I’m thinking a better result than when I use the CP, plus it’s saving me money too. Bleaching is expensive!! Just ordered more as I will definitely be using twice a week as recommended. Hubby has never bleached his teeth but there is a noticeable colour improvement in his too. Love it !!"

A third wrote: "I don’t normally write a review, but I’ve noticed a remarkable difference within a week. My teeth were very yellow, and I was using whitening strips which didn’t work for any length of time. Now my teeth look so much whiter. The taste is a bit metallic, but if you brush afterwards with your normal toothpaste it gets rid of the taste. Highly recommend."

A fourth added: "Used once a day first week then twice a week thereafter. I have naturally yellowish teeth battered with years of cigarettes (last one 11 years ago) plus a love of coffee and red wine. I had noticeable small brown marks which have gone and my teeth are much improved."

There are similar products on the market, such as Hismile Pap+ Tooth Whitening Powder on Amazon. You can get MySweetSmile's Teeth Whitening Powder for £19.99 in the Amazon Spring Deal.