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The results also showed that fingernails now grow by 3.47mm every month â almost twice as fast as toenails. The nails of younger people and men grow faster. The little finger nail grows much more slowly than other fingernails, at a rate of 3.08mm each month. The middle finger has the fastest-growing nail.
Luckily, scientists have. Fingernails grow a little over twice as quickly as toenails: an average rate of 3.47 mm/month compared to 1.62 mm/month [1]. Nails evolved from claws about 55 million years ago, and are one of the features that distinguish primates [2].