A woman pointing at her eyebrows

How Long Does It Take For Eyebrow Serum To Start Working?

If you're looking to grow thicker, bolder, and more beautiful brows, an eyebrow serum might offer some effective benefits.
Updated: September 28, 2023
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A bold pair of eyebrows can really define our face. They can inject a much-needed dose of radiance into our appearance, and add the cherry on top of the beauty cake.

In our endless pursuit of getting our dream brows, however, we can overdo it and find ourselves needing an effective way to grow hair quickly.

This is where eyebrow serum comes in… or does it? Let’s take a deeper look into brow serums and see if they can get us our ideal look.

Here’s why your eyebrows are thinning

There are no two ways about it, sometimes we can royally screw up our brows. It’s no surprise though, we’re always trying to look our best, and mistakes are often made.

If you’re looking for an eyebrow growth serum, the likelihood is your brows are in need of a bit of tender loving care. Here are some of the most common reasons why your brows are thinning.


Okay, this one is obvious. Ultimately, the thickness, strength, and growth ability of your eyebrows are largely determined by your genetics. DNA is super powerful and everyone has different capabilities. While you can’t change your genes (unfortunately) you can help them along by properly managing your eyebrows with the right treatments and products.


Stress is one of the leading factors when it comes to hair thinning and hair loss. It’s no surprise that in our modern, hectic society, more people are stressed out than ever before. It’s always important to learn how to “switch off” at times. This won’t just be good for your brows, but also for your mental and physical health.


You are what you eat, as the saying goes. Having a healthy, balanced diet, is one of the best ways to ensure the body feeds hair cells the nutrients they need to remain strong. This means more fruit and veggies, and less beer and fast food.


Once you pluck, you can’t stop. We’ve all been there. Over-plucking the eyebrows can happen gradually over a long period of time, but it really adds up. Resist the urge to pluck to perfection and only reserve it for odd hairs that need removing.

Do eyebrow serums really work?

That depends on what you want them to do. There’s a lot of confusion around brow serums and what they are and aren’t capable of. For the purposes of simplicity, let’s first clarify what they can’t do.

Despite what you may have been told in a commercial, online ad, or by a brand’s marketing campaign, eyebrow serums can’t actually make your hair grow any quicker. There is currently no scientific evidence or studies to suggest that this is possible. Unfortunately, many consumers buy serums because they have this pre-learned idea that they will make hair magically sprout from the skin, and they’ll grow bold, bushy brows overnight. We WISH this was the case, believe us. Sadly, reality can be disappointing.

However, this is not to say that eyebrow serum should be ignored and discarded. While it can’t conjure up rapid hair growth, it can massively improve the overall health and durability of your existing brows, and prime that area for future hair growth. Using ingredients such as castor oil and keratin, a good serum will support, solidify, and thicken the hairs at a structural level, which will provide the building blocks for more sustainable and resilient growth.

Consistency is key

So, how long does it take for eyebrow serum to work? Again, eyebrow serum isn’t going to make your hair grow any faster, but it will fortify your existing hair to withstand all challenges.

We’d recommend using a well-reviewed serum consistently for at least 12 weeks to see tangible results. You can apply it daily, or every other day. The most important thing is keeping it up, and making sure it remains an essential part of your routine.

Alternative Solutions for Brow Growth

Alright, beauty enthusiasts, let’s chat about some alternative solutions for those lovely brows of yours! Because, let’s face it, we all crave fuller, bolder brows, and sometimes, a serum is just one piece of the puzzle. So, what other magical remedies are out there? Buckle up, and let’s dive in!

Natural Oils: First up, we have the wonders of natural oils! Oils like castor, coconut, and olive are friends to our brows. They nourish and moisturize, giving those brow hairs the TLC they need. Simply dab a bit on at night, and let them work their magic!

Check out this awesome Castor Oil on Amazon!

Microblading: Now, if you’re looking for something a tad more permanent, microblading might be your match. This semi-permanent tattoo technique fills in sparse brows, giving them a fuller appearance. It’s like waking up with perfect brows every day – dreamy, right?

Dietary Supplements: We are what we eat – and this goes for our brows too! Consider adding supplements rich in Biotin and Vitamin E to your diet. They’re known to support hair growth and might just give your brows that extra boost. But remember, always chat with your doc before diving into new supplements.

Healthy Diet & Lifestyle: And of course, let’s not forget the basics. A balanced diet, plenty of water, and regular exercise do wonders for our bodies – brows included! So, let’s munch on those fruits and veggies and stay active for overall brow wellness.

In conclusion, while serums are fabulous, they’re not the only players in the game. By exploring these alternatives, you’re giving your brows the best shot at being bold and beautiful.

Final word

We know it might be disappointing to learn that eyebrow serum doesn’t miraculously cause new hair to grow, but it should be encouraging to know that with consistent usage, serum can drastically improve the health of the existing brows.

Try it for yourself, and get on the road to having bolder, bushier, and more beautiful brows.

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