Inside the Best Hair Serum of 2025

When it comes to achieving luscious, healthy-looking locks, the right hair serum can make all the difference. As another year comes to an end, we find ourselves reflecting on the year that’s been: the fresh new ingredients taking place in the spotlight, the jaw-dropping beauty trends, and, of course, the new products that quickly become household staples we can’t bear to live without.

However, with so many hair serums on the market promising to transform your hair, how do you choose the best one for your unique needs? In this guide, we’re delving into the world of hair serums to reveal the must-have features of a high-quality formula, the ingredients you should steer clear of, and a look inside Dr Tanya's Holy Basil Hair Serum —   the best hair serum of 2025. Let's get started!

Curious about what sets a great hair serum apart from the rest and what factors to consider when striving for optimal hair vitality? As skin and hair experts, here’s what we’ve found to be the most successful approach to finding the best hair serum for your goals: 

1. Look at the ingredients

Ensure the ingredients all offer hydrating and nourishing benefits. Think natural hair and scalp soothers like argan oil, holy basil, vitamin E, jojoba oil, coconut oil, and more. We personally believe your hair will flourish when you eliminate harmful ingredients, like silicones, parabens, sulphates, and synthetic fragrances, which can all irritate your scalp and provide a false sense of nourishment that causes more harm to your hair than good. Want to know more? Keep reading below!

2. Opt for natural products

Synthetic hair care products damage your hair health and impair the hair follicle. They leave a harmful coating on your hair, minimise nutrient nourishment, and can impact your internal health. 

On the contrary, natural hair care products (like Dr Tanya’s Holy Basil Hair Serum) contain no harsh chemicals or artificial ingredients, are suitable for people with skin allergies, deeply nourish your hair and scalp, and help minimise the risk of hair loss. Not to mention, they’re better for the environment and not tested on animals! Wondering if it’s time to switch up your hair care approach and want to learn more about hair health? Check out our blog: Synthetic vs. Natural Hair Care Products: What’s the Difference? 

3. Ensure it provides a solution to your problem

Whether you want to resolve frizz, protect your hair from heat damage, focus on repairing and strengthening your hair follicles, or simply improve your shine and radiance, it’s important to check that the hair serum you’re investing in is carefully designed to solve your hair concerns. 

4. Check hair type compatibility

All hair is unique, which means each hair care ritual should be too. What does this mean in terms of finding the best hair serum? It’s simple: fine hair will require a non-greasy, lightweight serum; thick and curly hair will need a stronger, more intensely nourishing formula; oily hair requires a lightweight solution; and dry and damaged hair needs a hydrating and deeply conditioning hair serum for optimal results.

5. Make sure it feels right

It’s all well and good to follow all of the correct steps in finding the best hair serum for your unique hair type, but at the end of the day, the best indicator of its suitability will be how it actually feels in your hair and how your hair responds to it. Ask yourself: Does it absorb well or feel extra heavy and greasy? Does it wash out well, or can you feel a residue build-up? Does it provide the finish you’re after?

6. Ensure it suits your budget

The best hair serum for you is one that fits within your budget. Sure, a higher price tag may equate to more premium ingredients, but it also may simply translate to a more prestigious brand name. Many affordable options deliver exceptional results without putting a serious dent in your savings. 

Evaluating the ingredients and price is essential to find the right choice for you. Take, for example, our Dr Tanya Holy Basil Hair Serum — a natural product formulated by a Doctor with almost two decades of experience. Our formulas, whether for skin or hair, are meticulously crafted with intention. And guess what? They don’t cost you the earth. Our Holy Basil Hair Serum retails for only $32.95!

While not all ingredients necessarily relate to hair serums, we’re passionate about natural hair care and the benefits your hair will see and feel when you remove unnecessary chemicals and ingredients. Let’s take a closer look at how you can better protect your hair and health by avoiding the following ingredients when building your hair care routine:

A note on phthalates—According to  Consumer Notice , this ingredient is currently under investigation due to its negative impact on the human endocrine system. Ongoing research suggests that  chronic exposure can potentially disrupt hormone signalling, resulting in damage to the reproductive system . 

Dr Tanya’s Holy Basil Hair Serum combines the benefits of traditional remedies that have withstood the test of time and cutting-edge deliveries of modern-day science to add potency. 

Enriched with Holy Basil, a powerful ingredient revered for its antioxidant properties,  this hair serum is Doctor-formulated and designed to restore strength, shine, and vitality to dry, damaged, and stressed hair.  Our targeted treatment delivers deep nourishment to the scalp and hair, helping  protect it against environmental stressors while enhancing natural resilience and shine. 

The elevator pitch? Holy Basil Hair Serum is an all-in-one hair serum designed to revive even the dullest, most tired-looking hair. 

A stable form of Vitamin E, Tocopheryl Acetate  improves scalp circulation  and, subsequently, hair follicle health and growth . Additionally, it can improve moisture retention in hair, which may reduce dryness-induced hair breakage and flakiness, resulting in softer, healthier-looking hair. 

Secondly, it offers antioxidant protection to help protect your hair and scalp from the damaging oxidative stress caused by free radicals, UV rays, and environmental pollution.  

Holy Basil—also known as Ocimum Sanctum and Tulsi—is an Ayurvedic herb that has been used in skincare and hair care for centuries. Owing to its antioxidant and antimicrobial properties, this powerhouse ingredient helps to soothe, smooth, and nourish hair from the scalp to the tips. 

Holy Basil can help soothe your scalp, reducing inflammation and calming irritation.  Similarly to Vitamin E, Holy Basil is also known to improve circulation and blood flow to the scalp, which delivers more nutrients to the hair follicles, resulting in healthier, stronger hair. Not to mention, it minimises hair breakage. Improved circulation also helps to stimulate the follicle, promoting new hair growth. 

Holy Basil’s antioxidant properties help to  neutralise damaging free radicals that can wreak havoc on your hair , such as pollution, UV damage, and more. 

If you haven’t already caught on, we’re big fans of Holy Basil Hair Serum, and it isn’t hard to see why. Let’s take a quick look at what makes this game-changing hair serum a fan favourite: 

• It deeply nourishes your hair and scalp:  It’s designed to enhance hydration and restore dry, damaged, and stressed hair. 
• It provides antioxidant support:  Did you know protection is key to long-term hair vitality? Thanks to Vitamin E and Holy Basil’s antioxidant-rich goodness, our Holy Basil Hair Serum plays a role in shielding your hair from environmental damage, i.e., pollution, UV rays, and more. 
• It boosts hair resilience and strength:  Our hair serum helps to reduce hair breakage and improve strand vitality, resulting in stronger, healthier-looking hair. 
• It enhances hair shine:  Holy Basil Hair Serum is a game-changer for improving your hair’s strength and health and offers the added benefit of more luscious-looking locks. Expect smoother, shinier, and more lush hair! 
• It boosts scalp health:  This formula nourishes and protects the scalp, resulting in healthier-looking and performing hair from the roots to the ends. With additional scalp support, you may find hair growth benefits.

Holy Basil Hair Serum is a versatile product that you can incorporate into your hair care ritual in more ways than one. Enjoy it your way and let it add value to your ritual in a way that best suits your routine. Here are a few of the ways our customers and team love to use Dr Tanya’s Holy Basil Hair Serum: