Grey hair may not be as prevalent as previously thought according to a recent study by Lâ€™Oreal. For years, the cosmetics industry believed in the 50/50/50 rule of thumb, which states that at age 50, 50% of the population has at least 50% grey hair.
The Lâ€™Oreal study, which was published in the British Journal of Dermatology, found that at the age 50, the average amount of grey for men and women was only 6% to 23%. In fact, for certain parts of the world, particularly Asia and Africa, the number is substantially lower.
This is an interesting finding, given that Lâ€™Oreal is in the business of selling hair dye.
The study analyzed natural hair color of 4,192 men an