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For years, protein has been praised as the holy grail of health, fueling muscles, boosting energy, and strengthening hair. But could too much protein actually be doing the opposite and contributing to hair loss? It’s a question that’s sparked debate among health experts and left many protein shake enthusiasts nervously checking their hairlines.
According to the American Academy of Dermatology, hair is primarily made of keratin, a protein that needs adequate nutrition to thrive. It is stated that a lack of protein in the diet can lead to thinning hair and shedding, which is why many people turn to high-protein diets and supplements to promote growth. However, the relationship between protein intake and hair health isn’t as straightforward as it seems.
Some experts argue that excessive protein consumption, especially from artificial supplements, can put stress on the kidneys and liver, potentially leading to nutritional imbalances. Dr Mark Reynolds, a nutritionist specialising in hair health, explains, “High-protein diets can sometimes lead to deficiencies in other key nutrients, like iron, zinc, and biotin—all of which are crucial for hair growth. When your body isn’t absorbing enough of these nutrients, hair loss can occur.”
Another concern is the impact of protein-heavy diets, such as keto, on hair health. A 2021 study published in the Journal of Clinical Nutrition found that individuals on extreme low-carb, high-protein diets experienced temporary hair shedding due to stress-induced telogen effluvium—a condition where hair prematurely enters the shedding phase. This is said to often be caused by rapid weight loss or changes in metabolism, both of which can be side effects of a protein-heavy diet.
There’s also the issue of protein supplements, particularly whey protein, which some claim can trigger hair loss. A study in Dermatology Reports suggested that certain protein powders, especially those containing growth hormones, may increase levels of dihydrotestosterone (DHT), a hormone linked to hair thinning in those predisposed to male or female pattern baldness.
However, the evidence remains inconclusive.
So, should you ditch the protein shakes? Not necessarily. Balance is key. “If you’re eating a well-rounded diet with enough vitamins and minerals, protein alone is unlikely to cause hair loss,” says Dr Mark. “But if you’re overloading on protein at the expense of other nutrients, your hair may pay the price.” In the end, it’s less about fearing protein and more about making sure your diet supports overall hair health.
Also see: Treat your crown with light therapy to prevent hair loss
