Thus, iron is usually only added in low doses or not at all ( 15, 16).įurthermore, there’s little evidence that hair loss supplements with nutrients like iron, biotin, B vitamins, vitamin C, zinc, selenium, and folic acid improve hair health or growth. Moreover, due to the risk of adverse side effects from iron supplements, most countries require a prescription for obtaining high doses of this mineral. Plus, taking these nutrients when you don’t have a deficiency likely won’t improve hair growth or appearance ( 13, 14). That said, deficiencies in the nutrients commonly added to hair vitamins - such as biotin and vitamin C - are rare. Similarly, a 2013 study showed that women with hair loss had significantly lower iron levels than women with no hair loss ( 12). Researchers believed the remaining cases of hair loss were caused by other nutrient deficiencies or conditions like thyroid disorders or female pattern baldness ( 11). While certain nutrients have been linked to better hair health, most studies have shown that hair supplements are only effective in people whose hair issues are caused by an existing nutrient deficiency ( 10).įor example, a 2016 study in 541 women with hair loss found that 38% of them were deficient in biotin.
What’s more, diets low in calories or fat are linked to weak, unhealthy hair.ĭespite the widespread use of hair vitamins and supplements, there’s little clinical data to support their ability to treat hair conditions. Nutrients important for healthy hair include protein, B vitamins, vitamins A, C, and D, and minerals like iron, selenium, and zinc.
#OLLY HEAVENLY HAIR REVIEWS PROFESSIONAL#
If you suspect any underlying causes of hair loss or a lack of growth, it’s important to work with a dermatologist or other healthcare professional to identify them. Increased hair loss and weak, unhealthy hair can also be caused by diets that are extremely low in calories and fat, such as certain weight loss diets, as well as diets that remove entire food groups, such as vegan eating patterns ( 5, 7, 8, 9). Additionally, deficiencies in nutrients like B vitamins, iron, and vitamins C and D have been linked to hair loss, poor hair growth, and weak hair ( 4, 5, 6). In particular, protein is essential for hair growth, as it’s the main building block of hair. In particular, getting enough of these key nutrients may improve the health and integrity of your hair ( 4): In many cases, improving your diet and lifestyle can support healthy hair. Signs of unhealthy hair include noticeable hair loss or thinning, lack of growth, dryness, weakness, brittleness, and dullness ( 3). This makes it difficult to determine the root cause or causes of any issues ( 1, 2). Hair health is determined by a multitude of factors, such as age, genetics, hormone levels, medical conditions, diet, stress, and hair treatments.
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