10 Best Thickening Shampoos 2025 in the UK

Grow Me® Hair Growth Shampoo by Watermans offers a well-rounded solution for individuals with thinning hair, featuring high-quality natural ingredients like Biotin, Argan Oil, Rosemary, Niacinamide, and Caffeine. These ingredients are known for promoting hair growth and enhancing scalp health, which is crucial for hair thickening treatments. The shampoo is suitable for both men and women and targets the root causes of hair thinning, making it versatile for various hair types.

Additionally, it is free of sulphates and parabens, making it a safer choice for sensitive scalps. The inclusion of Rosemary provides antioxidant and anti-inflammatory benefits, which can help reduce grey hair and improve scalp health, creating an ideal environment for hair growth. The mint scent adds a refreshing touch to the hair care routine.

However, users should be aware that for optimal results, the shampoo needs to be left on the scalp for a period to allow deep penetration of nutrients, which might require a change in usual washing habits. Watermans, the brand behind this product, has a strong reputation and has received endorsements from experts like trichologists and hair surgeons, further adding to the credibility of the shampoo. With over 13,000 customer reviews and a 4.2-star rating, it is evident that many users have found this shampoo effective and satisfying. While the shampoo may offer positive results, its effectiveness can vary from person to person, and it may not work equally for everyone.

Pantene Biotin&Bamboo Shampoo is designed specifically for those with dry, damaged, and thin hair. One of its prime strengths is the combination of biotin and bamboo, which are well-known ingredients for strengthening hair and reducing breakage. This shampoo aims to reduce hair loss due to breakage and promises up to 100% stronger hair, thanks to its high concentration of Pro-V nutrients and protein strengtheners. Pantene's long-standing reputation and 75 years of research behind the formula can give users confidence in its effectiveness.

The product has received high marks from customers, with a 4.6 out of 5-star rating based on over 1,300 reviews, indicating general satisfaction with its performance. The shampoo also features a pleasant bamboo scent and comes in a large 1-liter pump bottle, making it a convenient and cost-effective option for long-term use.

While the volumizing and moisturizing benefits are significant for those with damaged hair, it might not be the best choice for individuals with oily or very fine hair as it may weigh down the hair. Users looking for a lighter formula might need to look elsewhere. Additionally, those sensitive to scents might find the bamboo fragrance a bit overwhelming. This shampoo is best suited for those with dry, damaged, and thin hair looking for a reliable product to strengthen and nourish their hair.

Kérastase Densifique Femme is a thickening and volumizing shampoo specifically designed for fine hair. It stands out due to its premium ingredients like Hyaluronic Acid, Intra-Cylane, and Stemoxydine, which work together to make hair appear fuller and stronger. These components not only reinforce hair from root to tip but also moisturize and add shine, making it a solid choice for those seeking both volume and hydration. Users with fine hair will particularly benefit from its ability to boost body and bounce.

One possible downside is that it is unscented, which might not appeal to those who prefer a fragrant shampoo. However, this can also be a plus for individuals with sensitivities to strong scents. Although it is categorized as suitable for thick hair, its primary focus seems to be on enhancing fine hair, so individuals with already thick hair may not experience the same level of benefits.

Kérastase is a well-regarded brand known for its high-quality hair care products, adding a level of trust for potential buyers. However, considering the brand's premium position, the shampoo might be on the pricier side compared to other options in the market. The product's backing by a reputable brand and its specific focus on fine hair makes it a reliable choice for those willing to invest in quality hair care.