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How to find the Best Face Serum for Your Skin
The best skincare regime is one that’s as effective as it is enjoyable to use.
One of the most underrated ways to help you achieve your skin goals is by adding in a facial serum.
In this guide we’ll be answering some of your most-asked questions about serums, introducing you to our Booster Serum collection and helping you find your perfect match. Plus, showing you how to use them as part of your routine.
What is a face serum?
A face serum is a skincare product that helps enhance your routine by delivering concentrated, high-performance ingredients.
Their lightweight formulas are easily absorbed, which means they can penetrate deeper into the skin.
So, whether you’re looking for an extra hydration boost, enhanced radiance, skin barrier support or more blemish control, a serum can help you target your unique skin needs.
We believe in giving skin everything it needs and nothing it doesn’t. Which is why our Booster Serums contain no artificial colours, alcohol, perfume, mineral oils or harsh chemicals.
Like all Simple® products, each Booster Serum is dermatologically tested and developed with sensitive skin in mind. Which means people with all skin types can experience those amazing skin benefits - without worrying about the risk of irritation.
The Simple truth
Serums are lightweight, concentrated products that help you tackle specific skin needs. Our Booster Serums are formulated for sensitive skin, so everyone can enjoy using high-performance ingredients.
Oh, and each product is PETA approved and vegan, so that’s even more reason to reach for them.
You can learn about ingredients that can potentially cause skin irritation here.
What's the difference between a face serum and a moisturiser?
They might look and feel similar, but they have different roles in your skincare regime.
A serum targets specific skin needs and is light enough to sink deeply into the skin.
A moisturiser, however, tends to be richer and loaded with ingredients that help replenish your skin’s hydration levels. Sometimes, they can also have added benefits like SPF to protect the skin.

Which Booster Serum should I use?
Wondering what serums should I use? It’s all about what your skin needs and finding the one for you.
Our Booster Serum collection has three different formulas to choose from, so let’s take a look at each one and the benefits of each so that you can see what will work best for you and your skin.
Top tip: You can mix and match these different serums to meet your skin’s needs.
10% Vitamin B3 Niacinamide Booster Serum
Niacinamide is an ultra-versatile active ingredient that comes with so many skin benefits.
From helping you control blemishes to giving you skin barrier support, this serum is a great all-rounder for every skin type – especially if you’re oily or prone to breakouts.
Our 10% Niacinamide (Vitamin B3) Booster Serum also contains 1% Vitamin B5, which helps make your skin feel soft and smooths the appearance of fine lines.
Some of the key benefits of this Booster Serum include:
- Supporting your skin barrier health and function
- Reducing blemishes
- Evening your skin tone
- Improving texture
- Making skin feel softer and smoother
- Minimising the appearance of pores
- Improving skin elasticity
- Soothing redness
Shop 10% Vitamin B3 Niacinamide Booster Serum here.

3% Hyaluronic Acid + Vitamin B5 Booster Serum
Hyaluronic Acid is one of the most well-known, high-performance ingredients to supercharge your skincare regime.
Hyaluronic Acid is a humectant, which means it draws moisture from the air to the surface of the skin and retains it, locking in hydration. In fact, its famed for its ability to hold up to 1,000 times its weight in water.
That’s why it’s often considered the best serum for sensitive skin as it helps soothe and replenish.
Our formula also contains Vitamin B5 and PENTAVITIN™, which work together with Hyaluronic Acid to help provide deep, long-lasting hydration.
It’s the ideal serum to use with a replenishing moisturiser for super-dewy skin.
Some of the key benefits of this Booster Serum include:
- Soothing dry and sensitive skin
- Intensely hydrating
- Making skin feel softer and smoother
- Enhancing your moisturiser
Shop 3% Hyaluronic Acid + Vitamin B5 Booster Serum here.

10% Vitamins C + E + F Booster Serum
Lastly, our Vitamins C + E + F Booster Serum is pretty much glowing skin in a bottle, so it’s ideal if you’re looking to target dullness.
Packed with 10% active ingredients, our serum contains 2% of a skin-kind derivative of Vitamin C that won’t irritate your dry skin (or sensitive) skin.
1% Vitamin E boosts the effectiveness of Vitamin C and nourishes your skin, while 7% Vitamin F moisturises and strengthens your skin barrier.
Some of the key benefits of this Booster Serum include:
- Enhancing your glow
- Helping to protect against environmental aggressors
- Nourishing the skin
- Reducing the appearance of dark spots
- Supporting your skin barrier
Shop 10% Vitamins C + E + F Booster Serum here.
Can I use Booster Serum every day?
Absolutely, our serums for sensitive skin have been formulated to be gentle enough for everyone to use every day.
Plus, a serum works most effectively when they’re used consistently as part of your morning and evening skincare routines.
Depending on the formula and your skin, you may begin to see a difference from first use. But for the best results, use your Booster Serum regularly for a few weeks and watch the transformation.
How to use a Simple Booster Serum in your routine
Now you have a good idea of what skincare serum might suit your skin type and needs, let’s talk about how to use it in your routine...
1. Start with freshly cleansed skin
Cleansing your skin well each day helps keep your skin free from pollutants, makeup and more. Which can lead to everything from breakouts to premature ageing.
Having purified skin also means your Booster Serum can penetrate through the skin layers more effectively.
You can learn more about how to do it like an expert in our complete cleansing guide.
Start with a formula that you enjoy using and works for your skin type. We’re reaching for our Smoothing Gel Cleanser at the moment, which contains 5% Lactic Acid and Hyaluronic Acid.
This helps gently exfoliate at the same time, which also helps keep your pores clear, making your serum work more effectively.
Just smooth onto damp skin in a circular motion and rinse away with warm water before patting the skin dry with a towel.
Read up on exfoliation and why it’s a key part of maintaining healthy skin here.

2. Prep with a toner
Toners like our bestselling Kind to Skin™ Soothing Facial Toner refresh and calm the skin, as well as restoring its pH balance.
This makes it the perfect skincare product to prime your skin for a Booster Serum, helping improve its performance.
Just add a few drops to a reusable cotton pad and sweep across the skin – no need to rinse.
Want to read up on toners? Click here to discover more.
3. Smooth on your face serum
Now’s the moment you’ve been waiting for. You’ve cleansed and toned, so your skin’s ready to use one of our Booster Serums.
How do you use a face Booster Serum?
Because each of our Booster Serums are formulated with high levels of active ingredients, you only need to use a few drops as part of your morning and evening skincare routines to start to see results.
If you’re not sure how to use face serum, then we’re here to help. All you need to do is...
1. Take the serum of your choice and squeeze the pipette to release a few droplets into your hand
2. Let it warm up slightly and then smooth gently onto your skin
4. Finish with your favourite moisturiser
Now your Booster Serum is sinking in beautifully, it’s time to finish with the moisturiser of your choice.
For daytime, remember it's important to include SPF to protect your skin from UV rays. So, go for something like Protect ‘N’ Glow™ Triple Protect Moisturiser (which is also fab under makeup).
In the evening, you can go for replenishing formulas like our Active Skin Barrier Care Repairing Rich Cream, enriched with 22% Ceramide Boosters and Cica to strengthen and restore your skin barrier.
Just take a small amount of your chosen moisturiser and smooth into your skin and allow it to sink in.

Can I use Booster Serum without moisturiser?
Technically yes, but it’s always best to use them with a moisturiser to make sure that your skin is hydrated properly as they have different purposes. Because Booster Serums have a more lightweight consistency than moisturisers, using them first allows them to penetrate the skin more efficiently because it doesn’t have to try to get through richer formulas.
Looking for more skin care advice?
So, there you have it. Using a serum as part of your routine is easier than you thought, right? We hope you enjoyed reading up on our Booster Serum range. You can find out even more by clicking here.
Now you know all about our serums for skin and how they work as part of your daily regime, it’s time to take your skincare knowledge to the next level.
We’ve got plenty of skincare tips and more waiting for you over on our blog.
Don’t forget to join us on our social channels for even more updates and advice - see you there!
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