Tired of thin, fine or flat hair? Enter the DALLAS Biotin collection, and namely this thickening shampoo that will give your locks a new lease of life.

Get your 'oomph' back with R+CO's DALLAS Biotin Thickening Shampoo (250ml). This vitamin- and mineral-rich formula is supercharged with biotin to help boost the hair's natural keratin, as well as coconut oil and provitamin B5 to hydrate and soften strands. It's also infused with saw palmetto berry extract and loquat fruit extract, which collectively deliver a potent cocktail of vital nutrients that help to add body and volume. In other words (or those of the brand itself), if you want locks as big as Texas, make this your go-to.