With the advent of shampoo bars comes a new wave of innovation in cleansing products. A shampoo bar is much like a bar of soap; it's a solid block of shampoo aimed at reducing packaging waste. Luckily, the sustainability-aimed businesses leading the shampoo bar wave are also leading in innovation in the space.

One of our favorite recent releases in the world of beauty? Shampoo bars that are formulated to strengthen and grow your hair. This is an especially great option for people experiencing hormone imbalances and big life changes triggering stress, and a great maintenance option for aging hair follicles.

Interested in swapping to a more earth-conscious option that benefits your beauty routine? Check out our favorite strengthening shampoo bar brands and products below.

The Earthling Co.

The Earthling Co. makes what it calls the Shampoo Bar For Hair Strengthening, which prominently features marshmallow root to boost hydration and help with effortless detangling. It also contains fatty acid-rich coconut and jojoba oil for lifted shine, vitamin B5 to increase shine and strength, and guar bean for softness. Each option is completely free of sodium lauryl sulfate (SLS), sodium laureth sulfate (SLES), silicones, parabens, and phthalates. With seven different scents like Vanilla Coconut, Citrus Sun, and Cool Breeze, there is a soothing option for everyone. 

The Vida Bars

The Vida Bars are cruelty-free and formulated with curly-haired girls in mind. The company focuses less on the scent of the bars in its naming scheme and more on the results of each individual product. Products and sets are marketed as Balance for dry hair and oily scalps, Growth for all hair types, and Soothe for sensitive scalps. Take its Curl Quiz to find out what items best suit your hair. 

If you're looking for another reason to love The Vida Bars, 5% of the company's profits are donated to an educational fund for domestic violence survivors.

Humby Organics

Humby Organics' tagline is "Shampoo Bars For Hair Growth," and the product does not disappoint! It has standout scents and colors, including Eucalyptus Fairy in rainbow, and bold scents like Mango Breeze, Pink Hibiscus, and Blueberry Fields. 

Blueberry Fields is special because this bar in particular is formulated to help slow hair loss and increase scalp health. Blueberry extract is known to accelerate and improve the hair growth from the follicle. Shea butter in this formula helps balance oils and inject your strands with vitamin A. Vitamins C and B help promote the growth of hair proteins.

Humby has a gray hair collection that is formulated perfectly for aging, gray hair, among others. Take the quiz to find out what products best suit your hair. 

No matter which shampoo bar you go for, you can sleep soundly knowing you are actively reducing your eco footprint.