Shedding Light on Lashes: How Long Does a Single Eyelash Live?
In addition to their cosmetic appeal, eyelashes have a crucial biological function: they shield our eyes from perspiration, dust, and debris. These microscopic hairs, like the hair on our scalp, have an interesting life cycle despite their small size. In actuality, how long does one eyelash last?
The Lifespan of a Single Eyelash
A single eyelash typically lasts three to five months. There are three primary stages to this cycle:
Anagen (Growth Phase):
This stage, which lasts for 30 to 45 days, is the active growth period. The eyelash follicle lengthens the lash during this period by producing new cells. It's interesting to note that only 15% of your lower lashes and 40% of your higher lashes are ever in this phase.
Catagen (Transition Phase):
This stage is brief, lasting two to three weeks. The follicle starts to diminish and the lash stops developing. A lash that is plucked out during this phase will not regrow until the period is over.
Telogen (Resting Phase):
About three to four months pass during this latter phase. The lash stays in the follicle but does not expand; it ultimately sheds on its own while a new lash grows below it.
Natural Shedding: Nothing to Worry About
The loss of one to five eyelashes every day is rather common. A few lost lashes won't have much of an impact because the human eye normally has between 90 and 160 lashes on the upper eyelid and 75 to 80 on the lower. The normal growth cycle involves their continuous replacement.
Factors That Can Affect Eyelash Longevity
Several factors can influence how long an eyelash lasts, including
- Genetics and age
- Medical issues (such as thyroid diseases or baldness)
- Makeup application and eye hygiene
- Using curlers or eyelash extensions
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