Big BXL is a natural breast enhancement supplement that claims to increase breast size without surgery. It contains herbs that stimulate breast tissue growth and development. Laboratory tests showed over 25% of women experienced a 1% increase in breast size after 28 days and 6% increase after 56 days of use. Big BXL works by stimulating the body's natural growth of breast tissue while firming the breast area. It claims to help increase breast size by 1-2 cup sizes through non-hormonal plant estrogens that encourage new tissue formation.