Understanding the Four Stages of Eyelash Growth

Learn about each stage of the natural eyelash growth cycle: anagen (active growth), catagen (transition), telogen (resting) and exogen (shedding). Find out how Uklash can help you get longer, fuller lashes.

Understanding the Four Stages of Eyelash Growth

The eyelash growth cycle is a complex process that involves four distinct stages: anagen (active growth), catagen (transition), telogen (resting) and exogen (shedding). Each stage plays an important role in the development of healthy, full eyelashes. The anagen phase, or active growth phase, is where eyelashes begin to bloom. During this stage, natural eyelashes use a blood supply to boost their active growth.

Only a small part of your lashes will be in this phase at a time, so your lashes still retain their natural look. The anagen phase can last between 4 and 10 weeks, giving eyelashes the opportunity to grow to their full potential. The catagenic phase of the eyelash growth cycle follows the anagen phase. During this transition phase, the eyelashes have reached their full length and stop growing as the hair follicle shrinks and detaches itself from the fuel supply.

The eyelashes will remain in this transition phase for approximately 2 or 3 weeks before moving on to the telogen phase. The telogen phase is also known as the resting phase. During this stage, only about 40 percent of the upper lashes and 15 percent of the lower lashes are in the telogen phase at any given time. Each tab will grow to a specific length and then stop.

This phase can last more than 100 days before the eyelash falls out and a new one begins to grow. Finally, the exogen phase is when the eyelash falls out and a new one begins to grow. It usually takes four to eight weeks to completely replace an eyelash. Knowing the life cycle of eyelashes is important for professionals who apply eyelash extensions, as it helps them understand when it's appropriate to do so.

Recent discoveries about the role of eyelashes and their distinctive features have generated greater scientific interest. To date, there is only one approved pharmaceutical option for eyelash loss (eyelash hypotrichosis), which involves the topical application of a 0.03% bimatoprost ophthalmic solution (Latisse, Allergan) to the upper base of the eyelashes. Hypertrichosis is defined as an increase in hair anywhere on the body, while trichomegaly is specific to the eyelashes and eyebrows. Making sure your hair stays healthy is crucial to ensuring that newly grown eyelashes stay in place.

If an eyelash is torn off at this stage, the eyelash cycle is disrupted and it will take even longer for the follicle to grow back, and that is if the hair follicle is not permanently damaged. Unraveling these mechanisms will greatly improve the effectiveness of eye care professionals' interventions in eyelash abnormalities. The key capability of a well-formulated eyelash serum like Uklash is its ability to prolong the time an eyelash spends in the growth phase. Uklash begins to affect eyelashes from the first application, even if the results are not visible instantly.

Estelle Bungart
Estelle Bungart

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