10 Best Hair Thickening Shampoos 2025 in the UK

The Grow Me® Hair Growth Shampoo stands out with its impressive blend of natural ingredients like Biotin, Argan Oil, Rosemary, Niacinamide, and Caffeine. These ingredients are known for their positive effects on hair health, promoting stronger and thicker hair while also nourishing the scalp. The inclusion of rosemary is particularly beneficial for enhancing scalp health and potentially reducing grey hair.

This makes it a good choice for anyone experiencing hair thinning or looking for a way to boost their hair's volume and strength. It's also suitable for both men and women with different hair types. The formula is sulfate-free, which is a significant plus as it ensures a gentler experience on the scalp and hair, reducing the risk of irritation and dryness. Additionally, being cruelty-free, vegan, and pH neutral adds to its appeal for those who are conscious about ethical and environmental factors.

However, users should be aware that the shampoo requires leaving it on the scalp for a while to be most effective, which might be a bit inconvenient for some. Additionally, while many users have experienced positive results, the mild itchy sensation reported may be uncomfortable for others. With a 4.2-star rating from over 13,000 reviews, it is clear that many customers are satisfied with its performance, but individual results can vary.

The Kérastase Densifique Femme Thickening & Volumising Shampoo appears to be a strong contender for those with fine hair seeking added fullness and body. It is enriched with Hyaluronic Acid, Intracylane, and Stemoxydine, ingredients known for their moisturizing and strengthening properties, which aim to enhance hair volume and suppleness. Users can expect their hair to feel thicker and stronger with regular use.

The product is designed to cleanse, hydrate, and coat the hair fibre, contributing to more bounce and shine. Additionally, its formulation does not include sulfates, which can be beneficial for those concerned about harsh chemicals damaging their hair or scalp. However, it is worth noting that the shampoo is unscented, which might be a drawback for those who prefer fragranced hair care products.

The instructions suggest following up with a conditioner or hair mask for optimal results, indicating that it might be most effective as part of a complete hair care routine. While it is specifically aimed at thickening and volumizing fine hair, it may not suit other hair types as effectively. It is a well-rounded product for adults struggling with thin hair and seeking a boost in volume and strength.

The REDKEN Shampoo designed for flat and fine hair offers a promising solution for those seeking increased volume and lift. Featuring a unique blend of filloxane, silicone polymers, and citric acid, this shampoo is crafted to boost body, leaving hair shiny and manageable. Its compatibility with fine hair types is a significant advantage, ensuring that users with finer hair strands can achieve a fuller appearance without weighing their hair down. Additionally, the inclusion of citric acid could contribute to maintaining scalp health, providing a balanced pH and potentially aiding in reducing dandruff or irritation.

Despite its potential benefits, the product’s formulation does include silicone polymers, which might not be ideal for those preferring natural hair care products or avoiding silicones due to concerns about build-up over time. The absence of sulfate-free labeling might raise questions for users sensitive to sulfates or those with color-treated hair, as sulfates can strip away color or natural oils. Furthermore, the mint scent adds a refreshing touch, though individual preferences for fragrance can vary.

While the product is marketed for daily use, users should be mindful of overuse if they have sensitive or easily irritated scalps. REDKEN's volumizing shampoo could be a strong choice for individuals with fine or flat hair looking for immediate volume and shine, but those with specific ingredient concerns might need to consider these factors before purchase.