Thanks to @hellomag for this feature on Tom Smith.

On the importance of looking after your hair at home between salon visits.​​​​​​​​
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“We spoke to celebrity hairstylist Tom Smith from top London salon Billi Currie, who gave us the lowdown on how to get healthier hair at home. And yes, it is down to the way you treat your locks and the kinds of products you use – invest in a quality conditioner, mask, shampoo or heat protectant, and the results will speak for themselves.”​​​​​​​​
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“How can you tell if your hair is damaged?​​​​​​​​
By how it looks and how it feels. damaged hair can appear dull and limp, unevenly wavy or frizzy. It can also look thin on the ends and around the face. Damaged hair can feel rough, tangly and coarse or very slimy and stretchy when wet.​​​​​​​​
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What causes damaged hair?​​​​​​​​
Hair can be damaged by a variety of sources. We split these into three categories, mechanical, chemical or thermal damage. Mechanical damage comes from friction and wear and tear on the hair. This can be brushing the hair too roughly, tying it up too tightly or using poor quality hairbands or grips.​​​​​​​​
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It can also happen from friction rubbing on the headrest of your car, getting tangled while you sleep during the night or wearing too tight hats.​​​​​​​​
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Chemical damage comes from chemical aggressors such as nonprofessional hair colorants, misuse of professional hair colour, extreme bleaching, perming or chemical straightening, but also from exposure to extremely hard water or chlorine.​​​​​​​​
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Thermal damage comes from heat – this can be from washing in too hot water, from excessive blowdrying or from curling tongs or straightening irons.”​​​​​​​​

 

Link to read the article