What is the growth cycle of eyelashes?

Eyelashes play an essential role in protecting the eyes. A true natural barrier, they filter out dust, pollen, fine particles and other external agents that can irritate the eye's surface. But beyond this protective function, they also contribute to the aesthetics of the gaze, just like eyebrows and hair.

Like all body hair, eyelashes follow a precise biological cycle made up of several phases. This permanent growth helps maintain harmonious density throughout life. Thus, when some eyelashes fall out, others continue to grow to preserve the natural balance of the lash line.

On average, a person has between 150 and 200 eyelashes on the upper eyelid and between 70 and 100 eyelashes on the lower eyelid. The daily loss of a few eyelashes is perfectly normal: it corresponds to the natural regrowth mechanism that occurs continuously.

Understanding how eyelashes grow, why they fall out, and how to promote their development allows you to adopt the right habits for longer, stronger, and naturally more resilient eyelashes.

How does the eyelash growth cycle work?

The life cycle of an eyelash is similar to that of hair or eyebrows, but it is much shorter. It consists of three main phases: the anagen phase, the catagen phase, and the telogen phase.

Each eyelash evolves independently of the others. It is precisely this asynchronous growth that ensures that all eyelashes never fall out at the same time.

Anagen phase: the active growth phase

The anagen phase corresponds to the period when the eyelash is in full growth. During this stage, the hair follicle continuously produces new cells that allow the eyelash to gradually lengthen.

This phase generally lasts between 30 and 45 days, but its duration varies depending on genetics, age, and general health. The longer this phase, the longer the eyelashes can become.

During this period:

• Eyelashes grow actively.
• The hair follicle is working at full capacity.
• The eyelash is firmly anchored in the eyelid.
• Eyelashes are more resistant to rubbing.
• The final length is largely determined.

It is estimated that nearly 40% of eyelashes are simultaneously in the active growth phase.

Catagen phase: the transition

After the growth phase comes a transition period called the catagen phase.

This stage lasts between 2 and 3 weeks. Growth slows down and then gradually stops. The follicle retracts while the eyelash reaches its definitive size.

Even if the eyelash remains visible and appears perfectly healthy, its base becomes more fragile. When frequently rubbed, eyelashes can then detach more easily.

During this phase:

• Growth gradually stops.
• The hair follicle contracts.
• The eyelash maintains its maximum length.
• The attachment becomes less strong.
• External aggressions have a greater impact.

It is particularly at this stage that aggressive make-up removal actions can promote premature shedding.

Telogen phase: rest and renewal

The telogen phase corresponds to the end of the cycle.

During this resting period, which can last from 4 to 9 weeks, the eyelash remains in place but no longer grows. Simultaneously, a new eyelash is already beginning to grow beneath it.

As the new eyelash continues to grow, it naturally expels the old one. This permanent replacement mechanism ensures a constant density of the lash line.

This phase is characterized by:

• An eyelash at the end of its life.
• Minimal attachment in the follicle.
• The start of new eyelash regrowth.
• Completely natural shedding.
• Continuous renewal of the gaze.

How long does the complete growth of an eyelash take?

The complete cycle of an eyelash generally lasts between 2 and 4 months, or about 4 to 11 weeks depending on the individual.

Several factors influence this duration:

• Age.
• Genetic predispositions.
• Hormonal balance.
• Diet.
• Stress level.
• Care habits.
• Exposure to pollution.

Unlike hair, whose cycle can last several years, the eyelash cycle is relatively short. This explains why regrowth after accidental shedding is often faster than many imagine.

Why do eyelashes fall out?

The shedding of a few eyelashes each day is normal.

However, when the loss becomes significant, several factors can be involved.

Mechanical aggressions

Eyelashes are fragile. When they are regularly rubbed, pulled, or manipulated, their lifespan can decrease.

The most common behaviors include:

• Rubbing your eyes.
• Excessively using an eyelash curler.
• Sleeping with makeup on.
• Removing mascara too vigorously.
• Wearing extensions that are too heavy.

When continuously stressed, follicles can weaken and slow future growth.

Nutritional deficiencies

Like hair, eyelashes need specific nutrients.

A diet poor in:

• proteins,
• zinc,
• iron,
• B vitamins,
• biotin,

can slow their development and increase their shedding.

Stress and fatigue

Chronic stress directly influences the hair cycle. It can shorten the growth phase and accelerate entry into the resting phase.

Result: more eyelashes fall out simultaneously.

Allergies and cosmetic products

Certain mascaras, extension glues, or makeup removers can cause local reactions.

Repeated irritation weakens the follicle and can reduce the quality of new eyelashes that grow.

How to naturally promote eyelash growth?

Many people seek to make their eyelashes grow faster. While there is no miracle solution, certain habits can optimize their natural cycle.

Adopt a growth-friendly diet

Eyelash health starts with your plate.

Prioritize:

• fish rich in omega-3;
• eggs;
• legumes;
• red fruits;
• green vegetables;
• nuts and seeds.

These nutrients support cell production and contribute to better eyelash growth.

Can vegetable oils help?

Certain natural oils are particularly appreciated for nourishing and strengthening eyelashes.

Castor oil remains the most popular, but other options exist:

• sunflower oil;
• argan oil;
• jojoba oil;
• vitamin E oil.

Even if scientific studies remain limited, these treatments can help maintain the flexibility of the hair and limit breakage.

For effective application:

1. Carefully clean the eyes.
2. Use a clean brush.
3. Apply a small amount of product.
4. Avoid any direct contact with the eye.
5. Leave on overnight.

The oil acts more as a fortifying treatment than as a direct growth accelerator.

Are eyelash serums effective?

Growth serums are among the most sought-after treatments.

Modern formulas generally contain:

• peptides;
• panthenol;
• keratin;
• amino acids;
• plant extracts.

Certain active ingredients derived from clover, birch, larch, or red clover flower are regularly included in formulations designed to strengthen eyelashes.

These ingredients can help to:

• prolong the anagen phase;
• improve density;
• fortify existing eyelashes;
• reduce breakage;
• promote a better overall appearance.

Specialized complexes such as Lipocils are among the well-known references in the world of eyelash care.

To optimize results:

• apply the serum every evening;
• continue the treatment for several weeks;
• follow the usage recommendations;
• avoid frequent interruptions.

As eyelash growth is slow, the first effects generally appear after several weeks of regular use.

Ideal routine for stronger eyelashes

Here is a simple routine that we recommend to preserve the natural beauty of your eyelashes:

In the evening

• Gently remove eye makeup.
• Leave the cotton pad on for a few seconds before wiping.
• Never press hard on your eyelids.
• Remove any makeup residue.
• Apply your serum or oil.

In the morning

• Gently brush your eyelashes.
• Check that no residue remains.
• Use a suitable mascara.
• Avoid overly aggressive formulas.

This simple routine helps maintain natural, more resilient, and better protected eyelashes daily.

Eyelash extensions and natural cycle: what you need to know

Extensions directly follow the cycle of the lash to which they are attached.

When an extension is applied to a lash in the anagen phase, its retention will generally be longer. Conversely, when an extension is attached to a lash nearing the telogen phase, it will fall out quickly with the natural lash.

This is why professionals recommend refills every 2 to 3 weeks.

An experienced makeup artist will always adapt the weight and length of extensions to preserve the health of the follicle.

Overly heavy extensions can:

• weaken natural eyelashes;
• slow down regrowth;
• cause premature shedding;
• gradually reduce density.