Hello, Great article from Mary McCoy on the subject: Thinning eyebrows aren’t simply the result of over-plucking. Sometimes, women experience thinning eyebrows as a result of a medical condition or the aging process. Here are our helpful tips for remedying or disguising thinning eyebrows. Causes of thinning eyebrows Even though heavy-handedness with a set of tweezers is a major cause of thin eyebrows, sparse hair on your brow line may not be your fault. Several conditions can contribute to the appearance of thinning eyebrows: Nutrient deficiency. If you’re deficient in your vitamins and minerals, your whole body will start to show it. Vitamins A, E and D promote hair growth, and vitamin B mitigates bodily stress responses, which can prevent hair loss. A deficiency in any of these vitamins can cause thinning eyebrows. Hypothyroidism. Interestingly, an under-active thyroid can cause women to lose one-third of the hair on their eyebrows. Eczema. Although the flaky, itchy skin condition known as eczema…