Yes, potassium does promote hair growth. Potassium is a mineral that helps regulate the body’s water balance and electrolyte levels, which are essential for healthy hair growth. By maintaining proper hydration and balanced electrolytes, potassium can support the scalp environment necessary to nourish the hair follicles. Studies have shown that low potassium levels can lead to hair loss due to disruption of electrolyte balance in the scalp. Therefore, increasing dietary or supplemental intake of potassium may be beneficial in promoting healthy hair growth.