Yes. People typically lose about 100 hairs a day. This usually doesn't cause noticeable thinning of scalp hair because new hair is growing in at the same time. This is not hair loss or what is referred to as ‘shedding’, this is the normal cycle. Hair loss however is generally the gradual miniaturization of the hair follicle over multiple hair cycles with the follicle eventually dying and hair growth stopping. ‘Shedding’ sometimes called ‘a shed’ is a disruption in the cycle of hair growth in which the follicles are alive but have lost their hairs at the same time, often in response to starting a new hair loss treatment. Although at first a cause for worry, it means the hair is responding to the treatment and is not a reason to stop treatment.