At what time of day does our hair grow fastest of all?

Reference cited does not support the answer given.

Checked this and it appears to be late morning into early afternoon, so as usual, two options could be correct.

There is nothing in the 'blog', used as a reference, that supports the contention that hair grows 'fastest in the morning'. Indeed, as others have noted, metabolic rate is the main factor that seems to affect hair growth. No conclusions can be drawn as metabolic rate is unique to individuals and dependant on various factors. Reported.

I would dispute the answer. It is acknowledged that hair grows in relation to the metabolic rate, so the growth of hair during sleep would be the lowest. But the metabolic rate does not immediately revive when you wake up. It takes a few hours, so it would be reasonable to assume that the correct answer would be in the afternoon, then a wind down through the evening until sleeptime.

It is due to the metabolism rate - hair grows faster when the metabolism is increased. The metabolism increases according to a person's physical activity. Therefore it grows slowest at night if the person is asleep - for night time workers, this all changes. When your hair grows fastest depends on when a person does most activity so, when are you more active? That's when your hair grows fastest. If you go to the gymn or go for a run after work, then it's late afternoon. Morning is a very inadequate answer and the question can be answered correctly as long as it's not 'When you are asleep'. I think this question needs rethinking

I also guessed at night

I was told it grows faster in the sun which is during the day when the sun is brighter!