Yes, it is true that the growth rate –1.5 millimeters per month on average in toenails and 3 mm in fingernails– decreases slightly during the coldest months of the year , although it is not known for sure. Why happens.
It probably has to do with less exposure to the sun, a factor that, of course, affects the hair: the decrease in heat slows down blood circulation and the hair roots produce less keratin, the fibrous protein that forms both hair and nails . It is the same as when we stop watering a plant.
The hard endings of the fingers can grow more or less due to other circumstances. Thus, children and pregnant women have to cut them more often , and those of our dominant hand also come out faster.
