Which of the following is NOT a method for skin penetration?

The pectineal pathway is not recognized as a method of skin penetration in the context of esthetics and dermatology. Traditional methods for allowing substances to penetrate the skin include transcellular (which involves movement through skin cells), follicle wall (where penetration occurs through hair follicles), and sebaceous glands (which can transport oils and fat-soluble substances).

In contrast, the pectineal pathway is not a scientifically established route for penetration in the skin. It may be a misunderstanding or mislabeling of another term used in the study of skin anatomy or physiology. Correct knowledge of skin penetration pathways is crucial for estheticians, as it aids in understanding how products work and the best methods for application to achieve desired results.