Reading through the many beauty and health websites and fora I’ve noticed a lot of discussion about the benefits of castor oil on eyebrows. Some people swear to the fact that castor oil not only assists in eyebrow regrowth but it also speeds up the growing process and helps the eyebrows grow back thicker than before. I, personally, have my doubts.
Some claims are that castor oil nourishes the thyroid and endocrine system to bring your body to its maximum health. Through the increased health of your entire body enhanced eyebrow grow will follow.
There have been some fairly heated discussions about the use of castor oil with mixed reports about the effects of castor oil on the eyebrows. Some people have complained that applying castor oil to the eyebrows in the hopes of making them grow thicker has caused the opposite effect and their eyebrows actually fell out. Others have claimed that their eyebrows initially fell out, but then they regrew even thicker.
Applying castor oil around the eyes can be dangerous to the eyes and to the skin surrounding the eyes. It can cause irritation and puffiness to the eye. Still more people have complained that applying castor oil has resulted in sties due to the pores of their skin being blocked.
I have seen advice given by numerous people claiming that castor oil, when rubbed into the eyebrows or eyelashes once or twice a day will result in thicker eyebrows. Not only that but they will grow back more quickly. What I haven’t seen is any expert or scientific explanation as to why this may work.
Take this quote from one person espousing the use of castor oil “The first thing is to start applying castor oil to your eyebrows overnight. Castor oil has the specific property of making any kind of hair grow miraculously fast.” This person gives absolutely no explanation about how much to use, where exactly to apply the castor oil or the reasons why castor oil helps your eyebrows to regrow. There is also no warning about any possible side effects, as there must be if it is potent enough to cause a “miraculous” change to your body’s functions.
The nearest expert or authoritative comment I have found that could suggest that castor oil is effective in eyebrow growth comes from the FDA which categorizes castor oil as being able to Castor oil penetrate deep into the skin thanks to its molecular weight, which is low enough to penetrate into the stratum corneum. Castor Isostearate Succinate is a polymeric mixture of esters with Isostearic Acid and Succinic Acid used for skin conditioning, such as in shampoo, lipstick and lip balm.
The FDA report above can explain how castor oil applied externally can have an effect on eyebrow growth which relies on hair follicles beneath the skin to produce hair. Yet there are still no clues about the chemical properties that can stimulate any growth.
From what I can see you would use castor oil to promote eyebrow hair regrowth at your own risk. There is no guarantee that the result will be any increase in the growth of your eyebrows and there is actually the risk that it will cause the eyebrows to thin instead. The further risk that skin and eye irritation could be the result is very real.
Before putting anything on your eyebrows I would recommend that you see your family doctor and question them about using it. Beware of advice that is given without any solid evidentiary backing.