Black Beans in Korean Beauty Routines: What They Do and Don't Do for Hair
In South Korea, black beans are traditionally linked with healthy hair, but scientific evidence is limited. They are a valuable part of a balanced diet, not a proven remedy for hair loss.
In South Korea, whose beauty industry is widely known, hair health is supported not only by shampoos and serums but also by diet. One food long credited there with benefits for hair is the black bean, according to British Vogue. However, research suggests that no miracle effect should be expected from it.
Why beans are linked to hair
The main structural component of hair is keratin, which the body builds from amino acids obtained from protein. A prolonged lack of protein in the diet can harm hair condition, while iron deficiency is in some cases associated with increased hair loss. Black beans contain plant protein, fibre, iron, magnesium, potassium, B vitamins, folates and anthocyanins, the antioxidants that give the beans their dark colour.
In Korea the beans are used in cooking, and their extract is also added to certain shampoos, conditioners and scalp-care products. This approach reflects the belief that beautiful hair begins with a healthy scalp.
What studies show
A small study published in 2022 involved ten adults who took an extract made from several plants, including black soybeans and green tea, for three months. After 12 weeks, researchers noted changes in the number of shed hairs and in hair diameter. Because the sample was small and the extract contained several ingredients, it cannot be said with confidence that black soybeans were responsible. They are also a different legume from ordinary black beans, so the findings cannot automatically be applied to both.
Other considerations
Beans can be added to salads, soups, rice dishes or spreads. Iron, zinc, vitamin B12 and vitamin D also matter for hair, but large doses of supplements should not be taken without reason. Anyone experiencing increased hair loss is advised to see a doctor and have iron stores checked.
Hair condition is also affected by heredity, hormones, age, general health and daily care. Black beans are therefore best seen as part of a varied diet rather than a proven way to get thicker hair.
