From thin brows of the 1990's to the thick and natural brows of the early 2010's, huge variety of eyebrow shapes have been en vogue over the years. While the trends keep changing, the amount of hair that grows to form your eyebrows do not.
But why do some celebrities like Cara Delevingne have naturally thick eyebrows while others shave what little hair they have and swear by brow tattoos? Unsurprisingly, it's controlled by your DNA.
Last year, investigators using samples from Japanese women found a statistically significant locus on the EDAR gene that predicts eyebrow thickness (and this locus has been found in previous studies involving Asian participants). Mutations on the gene have been linked to other hair characteristics, facial characteristics, and even various skin conditions. To learn more about the gene, you can read the study here: https://www.ncbi.nlm.nih.gov/pubmed/29895819
Where do your genes stand when it comes to eyebrow thickness? Check Genomelink to find out!