How Hair, Skin and the Sebum Layer Protect our Pets

By Florence Chong

The relationship between skin, hair, and sebum is a fascinating example of biological interdependence contributing to the overall health and functionality of the body. With this column, I hope to bring some understanding of this significant symbiotic relationship so that pet owners will think thrice the next time they go to their dog groomers and ask for a shave down of their dog’s hair.

Ever wonder why your dog is always scratching? Answers to some of the following questions may provide insight into the condition:

Does your pup have a primary health condition that might lead to a compromised immune system? What do you or your pet groomer use to groom your pet? Do you use a conditioner after shampooing your dog? When your vet prescribes or recommends a strong medicated shampoo without a hydrating conditioner, consider the effect of the product on the pet’s skin. The after-feeling on your own hands would probably be a good indicator of the effect of the product on the pet’s skin.

A dog’s skin is like a trusty suit of armor for our canine companions, safeguarding them against elements and external threats. The skin is the largest organ of the body and is a physical barrier, protecting the dog from dirt, germs, and harmful substances. It protects their internal tissues from injuries, scratches, or abrasions. The barrier works both ways: it keeps bad things from getting into our bodies and keeps good things in. Skin is the frontline defender of the dog’s immune system.

Healthy skin is crucial to a dog’s overall well-being. Many people think that nutrition controls all skin conditions. Nutrition plays a big role but is not the only thing that affects skin health. The nutrients in the conditioners we use when bathing a dog affects the skin much more rapidly than what we feed them.

A dog’s hair acts as a protective barrier against environmental toxins and irritants. Hair is a physical barrier that prevents direct contact between the skin and harmful substances. Essentially, hair is the first line of defense shielding the dog against allergens before they reach the skin and minimizing allergic reactions or irritations. Hair protects the pet’s skin from harmful ultraviolet (UV) rays, which can cause burns and skin damage over time.

Maintaining healthy hair can have a positive impact on skin health due to the interconnected relationship between the two.

Sebum is the protective layer of the skin, vital as a natural defense mechanism in keeping the skin healthy and protected. It is made up of fatty acids and oils produced by the sebaceous glands in the skin. It coats and protects both hair and skin. The sebaceous gland in the skin is associated with the hair follicle itself. As the hair moves, the sebum moves up the hair shaft and over the skin. Sebum is not only a water-resistant barrier; it is also antibacterial and antifungal. In essence, sebum nourishes and protects both the skin and hair, while the skin and hair optimize the function of the sebaceous glands. This delicate balance is essential for maintaining healthy, resilient skin and hair.

Understanding the interdependent relationship of the pet’s skin, hair, and sebum layer is important. Share this information with your friends and family — it will provide insight to some of the skin problems their pet may be experiencing.