New year, new… lashes? If longer, thicker eyelashes are on your 2024 vision board, then we’ve got you covered because this lash growth serum is said to double the length of your eyelashes in just one month. The LUXROS Eyelash Growth Serum, £21.89 here (was £39.88), has been getting rave reviews from Amazon shoppers, who swear by the serum for giving their eyelashes a much needed boost.