TikTok has a knack for turning niche products into overnight sensations and the latest craze—black bean shampoo—is no exception. With an astonishing 8.1M% growth in views according to new data released by Spate, this trending shampoo is marketed as a solution for strengthening hair, reducing hair loss and even darkening gray strands. But can it deliver, or is this another case of TikTok overpromising and underdelivering?
Dallas dermatologist Elizabeth Bahar Houshmand, MD, explains its origins: “Black bean shampoo has been a staple in the Asian market, especially Korea, where it’s often formulated with salicylic acid to promote scalp exfoliation. Exfoliating the scalp once a week to remove product build-up can be helpful, but I haven’t seen any studies specifically on black beans in hair care. I would still recommend eating them for their protein.”
What Makes Black Bean Shampoo Special?
At the core of the trend is black soybean seed extract, a protein-rich ingredient containing cysteine, an amino acid associated with hair growth. “One small study showed that black soybean extract applied to the scalp increased blood flow and encouraged hair growth,” says Omaha, NE dermatologist Joel Schlessinger, MD. “However, more research is needed to confirm whether this is a serious option or just another fleeting TikTok craze.”
Black beans are known for their high levels of protein, antioxidants and amino acids, which proponents claim help improve scalp health and strengthen hair. Rochester, MI dermatologist Mariana D. Atanasovski, MD, notes, “There’s anecdotal data that black bean shampoo may help strengthen the hair follicle, potentially reduce hair loss and even promote growth. The natural pigment in black beans might even help darken gray hair with regular use.”
The Science (or Lack of It)
While black bean shampoo’s popularity is undeniable, its efficacy remains largely anecdotal. Bloomfield Hills, MI dermatologist Linda C. Honet, MD cautions, “Black beans are known to be packed with plant protein, zinc and other antioxidants and a black bean shampoo may have an antioxidant effect to help inflammation and may also temporarily plump the hair shaft for volumizing effect. However, black beans are more likely to benefit hair if eaten and consumed in the diet, but any direct effect from diet may be difficult to substantiate.”
Are There Benefits for Hair Health?
Trichologist Kery E. Yates highlights some potential upsides, particularly for overall scalp and follicle health. “Black beans are rich in natural antioxidants that help prevent damage from environmental factors,” she explains. “They also have anti-inflammatory and anti-bacterial properties, which can protect the follicle and promote healthy scalp conditions. This ‘hero’ ingredient could benefit all hair types.”
Still, dermatologists urge caution. “Hair loss is complex and rarely solved with one product,” says Omaha, NE dermatologist Daniel Schlessinger, MD. “While black bean shampoo may not be harmful, it’s unlikely to be your most effective option and could delay proper treatment. Always consult a board-certified dermatologist for personalized advice.”
Vienna, VA dermatologist Brenda Dintiman, MD, echoes this sentiment: “There is some evidence that black bean extract will smooth the hair and make it look healthier, but I think it’s highly unlikely the topical application is doing much. I often find that there are too many natural ingredients in shampoos, and I have to encourage patients not to use them since they can create irritation and sometimes more inflammation.”
The Bottom Line
Black bean shampoo’s rise to fame on TikTok is a testament to the power of social media in shaping beauty trends. While the ingredient’s natural properties may provide temporary benefits like scalp exfoliation, reduced inflammation, or hair shaft plumping, its efficacy as a long-term solution for hair loss remains unproven. “Popularity driven by social media often gets mistaken for clinical efficacy,” warns Dr. Honet. “Buyer beware.”
