Why laser results varies on different body parts or different people?

The reason why laser hair removal may work more quickly on the body and more slowly on the face is due to several factors:
Hair thickness: Body hair tends to be thicker and coarser than facial hair. Thicker hair absorbs more energy from the laser, making it easier to target and destroy the hair follicle.
Skin color: Laser hair removal works by targeting the pigment in the hair follicle. If the skin surrounding the hair is also pigmented, such as in darker skin tones, the laser can inadvertently target the surrounding skin, leading to potential side effects. Therefore, laser hair removal is often slower and requires more caution when performed on facial hair, where the skin is more delicate and pigmentation is more variable.
Hormones: Hormonal changes can affect hair growth and thickness, and may play a role in how effective laser hair removal is on different areas of the body. Hormonal fluctuations are more common and pronounced in facial hair growth patterns, making hair growth more resistant to laser hair removal in this area.
The growth of facial hair is influenced by androgens, which are male sex hormones. Testosterone is the primary androgen responsible for the development of facial hair. During puberty, testosterone levels increase in males, which triggers the development of secondary sex characteristics such as facial hair growth.
Androgens work by stimulating hair follicles to produce thicker and coarser hair. The distribution of hair follicles and the type of hair they produce is genetically determined, which is why some men are able to grow full beards while others have patchy or sparse facial hair.
In addition to testosterone, other hormones can also influence facial hair growth. For example, dihydrotestosterone (DHT) is a more potent form of testosterone that is produced in the skin and can contribute to the growth of facial hair. Hormonal imbalances, such as those caused by certain medical conditions, can also affect facial hair growth.
In general, laser hair removal is still an effective treatment for both body and facial hair, but the results may vary based on individual characteristics including gender, hair types and body areas.
If you would like tips and advise on how to get the best possible result for clients, contact our training department at AW3.
By Sara at Allwhite Laser Training Academy. 
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