Summer is quietly changing your body, and your fingernails prove it

Warmer weather may slightly increase nail growth due to better blood circulation. However, a physician's decades-long study found no measurable climate effect on his nails. Factors like age, genetics, and nutrition significantly influence nail growth rates. Illnesses and injuries also impact how quickly nails grow and recover. Overall, everyday influences have a more substantial effect than seasonal temperature changes.

Raccontata daeconomictimes.indiatimes.com