When it comes to good hair care, we're willing to try out all manner of weird and wonderful methods to get our tresses looking healthy.
But luckily, research has confirmed that one of the simplest tricks for maintaining hair could be the key: all you need to do is rotate your shampoo.
Beauty expert Dr Nicole Rogers, an assistant clinical professor of dermatology at Tulane University School of Medicine in New Orleans, confirmed the effectiveness of swapping your shampoo to the Wall Street Journal.
The trick works particularly well in winter, when the cold air becomes drier than normal and can leave hair difficult to tame with a regular shampoo. This is because most shampoos contain sulfate, which Dr Rogers says causes them to "literally have a negative charge, which can contribute to static electricity."
It is therefore recommended that we swap our usual shampoo for one that contains nourishing ingredients such as glycerin or domethicone throughout the colder months, to keep tresses shiny and bouncy.
The opposite is true for summer, when increased perspiration can mean our hair gets dirtier quicker, and can require increased washing with a cleansing shampoo that contains sulfate.
Dr Rogers also recommends we rotate our shampoo if we have a sudden change in diet or develop dandruff. She also says hair needs to be washed less regularly as we get older.
However, she debunked the common myth that we need to rotate our shampoo every couple of weeks to stop hair becoming "immune" to the ingredients, as it's not a living thing and therefore can't become "resistant" to a certain shampoo.