There are several reviews and sources of information available on ginger hair regrowth shampoo bars. Here are some key points from the search results:

Positive reviews:

• Some customers have reported that ginger hair regrowth shampoo bars have added volume to their hair and made it easy to manage.
• One customer reported that their hair felt clean, light, and silky after using a ginger hair regrowth shampoo bar.
• A reviewer on Mumnnatural.com reported that the ginger shampoo bar reduced their hair loss problems and had a considerable regrowth in just a week. They also mentioned that it left their hair soft and naturally shiny.
• Drew Barrymore shared on Instagram that she loves Garniers Whole Blends Ginger Recovery Strengthening Shampoo Bar, which contains nourishing almond oil and ginger root extract to strengthen and revitalize hair strands. She also mentioned that ginger has been known to slow down hair loss.

Negative reviews:

• One customer reported that a ginger hair regrowth shampoo bar did not regrow their hair.

Ingredients or materials:

• Ginger hair regrowth shampoo bars are made with ginger plant essence, which nourishes and moisturizes hair.
• Some ginger hair regrowth shampoo bars also contain other natural ingredients, such as almond oil.

Overall, the reviews for ginger hair regrowth shampoo bars are mixed, with some customers reporting positive results and others not seeing any regrowth. However, many customers have reported that these shampoo bars leave their hair feeling clean, soft, and manageable. The key ingredient in these shampoo bars is ginger plant essence, which is known to nourish and moisturize hair. Some shampoo bars also contain other natural ingredients, such as almond oil.