Hair training is the process of gradually prolonging the time in between wash days, working up to a 30 day gap. The theory is that your scalp will adjust to fewer washes and produce less oil, meaning your hair won't get greasy so quickly.
But you can train your hair to be less oily with a technique called hair training. This involves slowly reducing the frequency of hair washes to get your scalp used to not being rinsed often, naturally minimizing oil production.
Depending on your hair type, you can wait three to five days between washes, and we've got the scoop on how to survive the process while you're waiting for sebum production to slow down. We'll admit, the first two weeks are the most difficult, but after about week four, you should see a significant difference.
"You can train your scalp to be less greasy in the course of three to four days, however, it will take some time for your body to fully adjust," Potempa says. "Take some time to do research about the type of hair you have and establish a new routine that gives your body enough time to adjust to the change."
By rule of thumb, it will take at least six weeks for your hair to transition properly. It usually takes this long because your scalp is so used to its oil being stripped, it will be overcompensating for a while.
Going a long time without washing your hair can cause a buildup of a yeast-like fungus called Malassezia on your scalp. Over time, this leads to a layer of dead skin cells that shed from your head in the form of oily, yellow-ish dandruff flakes. Dandruff can also make your scalp red, scaly, and itchy.
Remember, oil is just part of the way your body protects your scalp, and there's nothing dirty or wrong about a little oil buildup in your hair. If you're concerned by how much you sweat or if your scalp is often irritated, speak to a dermatologist for some expert advice.
Those with fine or thin hair, however, may find their hair looks greasy after just one day. It's all to do with the amount of oil your scalp produces, as well as how well your hair can carry that oil.
Hair growth flourishes from a clean, healthy scalp. The bottom line is that dirty hair doesn't grow any faster than clean hair, so you may as well have a clean scalp and fresh tresses. Your strands will look better, feel better, and be healthier, too.
Even if the hair does not feel oily, frequent shampooing is still essential to keep the scalp environment clean and healthy, so we wouldn't recommend going any longer than three to four days without shampooing.
Try this: Use dry shampoo before your hair gets greasy. Apply dry shampoo in your hair before you go to bed and allow it to stay overnight. This allows the dry shampoo to soak up the natural oils your hair produces while you sleep and you will be able to brush it out in the morning.
In fact, there is currently no scientific evidence to support that hair training works. Our natural sebum is being produced all the time and, left on its own, will eventually make hair feel and look oily. (Sebum is an oily, waxy substance produced by your body's sebaceous glands.
Your Hair Will Become Healthier
Your hair produces it's own natural hair oils or sebum which helps to keep it smooth, moisturized and prevents breakage. Excessive washing strips hair of its natural oils and can lead to hair that's dry and brittle.
Lifestyle and diet changes to fix oily hair
Your diet should consist of foods rich in vitamin B, especially B2 and B6. It is believed that these components in your diet can help keep your sebum production in control. So, consider adding foods like leafy vegetables, pulses, and seaweed.
Prolonged periods of not washing can cause cause buildup on the scalp, damaging hair and even impeding its ability to grow, Lamb said. Grime from dirt, oil and hair product can show up within four to six days for people with finer, straighter hair.
Air-drying your hair can be a great way to give your locks a much-needed break from heat-styling. However, if your hair is on the thicker and coarser side, it may be best to start with a protective product and use a blow-dryer to keep your hair from absorbing too much moisture and causing breakage.
Our hair follicles are surrounded by sebaceous glands. Overproduction of sebum leads to blockage, inflammation, and hardening in the pores. That, in turn, leads to the thinning of the hair with accompanying hair loss. So, oily scalp can cause the hair to fall out faster than it can grow back.
“Shampoo less and your hair will be more hydrated,” they said, which helps promote thickness. “Be sure to use sulfate-free products to preserve your hair's natural oils.
Water is effective at washing away dirt, dust, and other water-soluble debris from the hair and scalp without stripping the hair of this sebum. However, Mamelak notes that if there are other oils in the hair (from a haircare or styling product, for example), a good portion of these will be left behind as well.
The bottom line is that dirty hair does not grow faster than clean hair, so you might as well have a clean scalp and fresh hair. Your hair will look better, feel better, and be healthier as a result.