On average, a person loses between 50 and 100 hairs per day as part of the bodys natural renewal cycle. Hair falls out as part of a cycle that includes a growth stage (anagen) and a rest stage (telogen) before the hair falls out. This cycle repeats itself for as long as the hair follicle remains active and continues to produce new hairs.
Regarding hair products, some chemical ingredients in shampoos can be harmful and cause breakage or increased hair loss. Anyone who notices an increase in how much hair they wash out in the shower may wish to stop using the product and opt for a gentler formula. If the increase is sharp, it may be best to see a doctor or dermatologist. Anyone who is losing more than about 100 hairs a day or noticing large clumps of hair falling out could be experiencing excessive hair shedding.
There are some chemicals that can potentially cause hair loss, hair damage, and other issues. These include:
- Formaldehyde
- Sodium Lauryl Sulfate (SLS)
- Sodium Laureth Sulfate (SLES)
- Parabens
- Phthalates
- Polyethylene Glycol (PEG)
- Triclosan
- Synthetic fragrances
However, regulatory bodies like the FDA have done a good job of preventing harmful and dangerous ingredients from getting into consumer hair care products. Most hair products available are unlikely to cause hair loss.
Regarding nutrient deficiency and supplement use, iron deficiency (ID) is the worlds most common nutritional deficiency and is a risk factor for hair loss. However, there is currently a lack of literature regarding the effects of supplementation in individuals without nutrient deficiency.
In summary, the average person loses between 50 and 100 hairs per day, and some chemical ingredients in shampoos can be harmful and cause breakage or increased hair loss. Most hair products available are unlikely to cause hair loss. Iron deficiency is a risk factor for hair loss, but there is currently a lack of literature regarding the effects of supplementation in individuals without nutrient deficiency.
