Why is my serum no longer working?
Have you been using an eyelash serum for a while, but the results seem to be lacking? You're not the only one! In this blog, you'll discover the most common reasons why an eyelash serum sometimes doesn't work (anymore) and what you can do to make it effective again.
Key take aways:
- Eyelashes can reach a growth plateau due to their natural cycle, which temporarily reduces the effect of your serum.
- Long-term use can cause tolerance, making your body less responsive to the active ingredients.
- An expired or improperly stored serum can lose its effectiveness and therefore produce fewer results.
- Taking a break or switching serums can help stimulate your eyelashes again.
1. Sie erreichen ein Wachstumsplateau
Eyelashes have a natural growth cycle consisting of three phases:
- Anagen phase (growth): Your eyelashes are actively growing.
- Catagen phase (transition): Growth stops and the hair follicles shrink.
- Telogen phase (rest): The eyelash eventually falls out, after which a new cycle begins.
An eyelash serum usually prolongs the growth phase, but there is a limit. Your eyelashes cannot grow indefinitely, no matter how much you stimulate them. When your hairs reach the rest or shedding phase, it may seem as if the serum is no longer working. However, this is a natural process.
Solution: Don't worry! This is completely normal. Continue using the serum to support the health of your eyelashes and prevent them from returning to their original state. Regular use helps maintain resilient and strong eyelashes.
2. Your Body Has Adapted
With long-term use of an eyelash serum, your body can get used to the active ingredients. This is also known as “tolerance.” The effect then seems less powerful, simply because your eyelashes no longer respond as they did in the beginning.
Solution:
Consider a short break of two to four weeks to push the “reset button.” After this rest period, you can start using the serum again. An alternative option is to try another serum with a different composition of active ingredients.
3. Serum Has Expired or Become Less Effective
Like all cosmetic products, an eyelash serum has an expiration date. If your serum is past its expiration date or has been stored the wrong way (for example, in a warm or sunny environment), the active ingredients may lose their effectiveness. This can result in reduced or even no visible results at all.
Solution:
Check the expiration date on the packaging. Always store the serum in a cool, dark place to maintain its effectiveness. If you suspect your serum is no longer working, it's time to purchase a new bottle. Invest in a quality product and pay attention to proper storage.

Curious about the best eyelash serum?
Discover the Ecuri Beauty super lash eyelash serum
Conclusion
It can be a bit of a shock if you notice that your eyelash serum seems less effective, but there are often simple solutions. Understand the natural growth cycle of your lashes, give your body a break from time to time and check the shelf life of your products. By following these steps, you can enjoy full, healthy lashes again!
Questions about an eyelash serum?
After reading this article, do you have any questions about eyelash serums? Or perhaps useful tips for us and other eyelash serum users? Don't hesitate, we'd love to hear from you!