Does the Vegan Diet Cause Hair Loss?

Approximately 5% of Israelis, 4% of Swedes, and 3% of Americans are vegans. Veganism, a severely restrictive eating plan that avoids beef, pork, poultry, seafood, eggs, and dairy products, is increasing in popularity among millennials worldwide. Vegans adopt this prohibitive eating plan for health, ethical, and religious reasons. Vegans only consume plant-based foods, such as grains, legumes, nuts, fruits, and vegetables. The vegan diet’s elimination of several food groups results in various nutritional deficiencies. A deficiency in vital nutrients causes many adverse health effects in people practicing this prohibitive eating plan. Excessive hair loss is claimed to be an adverse health effect of the vegan diet. Does the vegan diet make you lose your hair?

Why do People Become Vegan?

Veganism, or eating a plant-only diet, is not a new diet fad or fringe movement. Veganism is being practiced for more than 5,000 years, with the dietary regimen originating in the Indian subcontinent. For millennia, people practiced veganism for health, moral, and spiritual reasons. Indeed, a well-balanced vegan diet has many health benefits, such as a decreased risk for obesity, type-2 diabetes, heart disease, high blood pressure, and high cholesterol. Further, many people avoid eating animal products and byproducts to minimize animal suffering and exploitation. Others avoid eating food derived from animals to promote bodily and spiritual purity. While there are many advantages to eating a plant-only diet, an unbalanced vegan diet causes severe nutritional deficiencies. These nutritional deficiencies result in a variety of health issues, such as hair loss.

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Why Does the Vegan Diet Cause Hair Loss?

A typical vegan diet is low caloric and deficient in vital nutrients. Veganism eliminates meat, poultry, seafood, eggs, and dairy from your diet. Eliminating several food groups from your diet deprives your body of critical nutrients needed for healthy hair growth. A typical vegan diet is deficient in vital nutrients such as protein, iron, and iodine. Further, as many food groups are eliminated from the vegan diet, the caloric intake of the individual on the vegan diet is drastically reduced. This drastic reduction in caloric intake leads to rapid and extreme weight loss. The combination of low caloric intake and insufficient nutrient consumption exerts tremendous stress on your body. This extreme stress triggers your body to alter its normal functioning to help you survive through this crisis.

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When your body encounters severe nutritional deficiency, it alters its regular physiological functioning to help you survive this nutritional crisis. To increase your chances of survivability, your body withholds essential nutrients from non-essential bodily functions. Instead, your body will allocate these crucial nutrients to essential bodily functions to maximize your chances of survivability.

Hair is not an essential bodily tissue, meaning your body can survive without it. Even if you’re only minimally deficient in a nutrient, your body will withhold this nutrient from your hair first because hair renewal and growth are not essential bodily functions. As a result, excessive hair loss ensues as your hair follicles are deprived of critical nutrients. This nutritional deficiency resulting from the vegan diet also causes stress-related hair loss.

Stress-Related Hair Loss

The vegan diet’s inherent low caloric regimen exerts tremendous stress on your body, triggering excessive hair loss. This sudden and excessive hair loss resulting from physiological stress is known as Telogen Effluvium (TE) in the medical community. Telogen effluvium is a temporary and reversible hair loss resulting from severe physiological or emotional stress, shock, or a traumatic event.

Severe nutritional deficiency, drug use, serious illness, surgery, or childbirth are some of the causes of telogen effluvium. When your body is under severe stress, it will force hair follicles from the active growth phase to the resting phase. In the resting phase, your hair will begin to shed rapidly, resulting in noticeable hair thinning from all over your scalp. An unbalanced vegan diet leads to severe nutritional deficiency, which imposes considerable physiological stress on your body. This extreme physiological stress triggers stress-related hair loss.

How do You Prevent Hair Loss on a Vegan Diet?

Fortunately, hair loss resulting from the vegan diet is reversible and preventable. A vegan diet is low in calories and deficient in crucial nutrients needed for healthy hair. A typical vegan diet lacks adequate protein, iron, and iodine. A well-balanced vegan diet that supplies your body with all the energy and essential nutrients it needs is beneficial for your health and promotes healthy hair growth. The following approaches will help prevent hair loss on a vegan diet:

Maintain a Healthy Caloric Intake

When you go vegan, you cut out most food groups from your diet, resulting in very limited food options. With limited food options to eat, you lose weight suddenly and rapidly on a vegan diet. This sudden and rapid weight loss shocks your physiological system and imposes considerable stress on your body, triggering stress-related hair loss.

To prevent stress-related hair loss on a vegan diet, make sure you are consuming enough calories to avoid shocking and exerting stress on your body. In general, the recommended caloric intake for adult women is 2,000 calories per day. For men, the recommended caloric intake is 2,500 calories per day. Nuts, nut butters, vegetable oils, and dried fruits are ultra-nutritious and high-calorie vegan-friendly foods you can consume daily to increase your caloric intake.

  • 1 cup (146 grams | 5.15 ounces) of raw peanuts = 828 calories
  • 2 tablespoons of almond butter = 202 calories
  • 2 tablespoons of olive oil = 238 calories
  • (100 grams | 3.5 ounces) of dates = 277 calories
  • 1 cup (250 grams | 8.8 ounces) of dried apricots = 213 calories
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Consume Sufficient Protein

Protein is an essential macronutrient your body needs for cellular repair, growth, and maintenance. Proteins form the building blocks of your bodily tissues. Proteins, themselves, are made up of smaller units called amino acids. Amino acids are divided into two categories: essential and non-essential amino acids. Your body is able to produce all the non-essential amino acids it needs, but it can’t produce essential amino acids. Therefore, essential amino acids must be obtained from your diet. Foods that contains all the nine essential amino acids are called complete proteins.

A vegan diet is typically low in protein as it eliminates protein-rich foods such as meat, poultry, eggs, seafood, and dairy from your diet. Hair is made up of a fibrous structural protein called Keratin. When you consume inadequate quantities of protein, your body stops hair growth or produces very low-quality hair to conserve protein for more important bodily functions. As a result, a typical low protein vegan diet can lead to hair loss, or force hair follicles to produce very low-quality hair, leading to dull, brittle hair.

Plant-Based Complete Proteins

The average daily protein requirement is 0.8 grams per kilogram of body weight or 0.36 grams per pound of body weight. Vegans must consume plant-derived complete proteins to satisfy their daily protein requirements.  Plant-based complete proteins such as soybeans, quinoa, tofu, spirulina, tempeh, buckwheat, and edamame, should be consumed daily to meet your daily protein requirement. These plant-based complete proteins will supply your body with all the nine essential amino acids it needs to perform its functions optimally.

  • (85 grams | 3 ounces) of tempeh = 11 grams of protein
  • One tablespoon of spirulina = 4 grams of protein
  • One cup (172 grams | 6 ounces) of roasted soybeans = 68 grams of protein
  • (85 grams | 3 ounces) of tofu = 8 grams of protein
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While it’s always better to obtain nutrients from your diet, you can take vegan-friendly protein supplements daily to add more protein to your diet. Supplying your body with adequate protein will provide your body with all the essential amino acids it needs to perform its essential functions.

Consume Adequate Iron


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The medical community warned for decades that iron deficiency causes hair loss. Iron is one of the most vital nutrients required for your survival. Your body needs iron to make hemoglobin, a metalloprotein substance inside red blood cells that transports oxygen throughout your body. Therefore, when your body is iron deficient, it produces less hemoglobin, leading to reduced oxygen levels within your body. This condition is known as iron-deficiency anemia. Insufficient iron levels in your body trigger your physiological system into survival mode.

In survival mode, your body allocates oxygen and other crucial nutrients to vital organs for essential bodily functions and deprives oxygen and other crucial nutrients from non-essential bodily functions, such as hair renewal and growth. Consequently, your body will deprive your hair follicles of oxygen and nutrients. As a result, hair falls out in large quantities as your hair follicles are deprived of crucial nutrients.

To prevent hair loss on a vegan diet, make sure you consume adequate iron to supply your body with the optimal amounts of oxygen it needs. The recommended daily allowance for iron consumption is 8 mg for adult men, 18 mg for menstruating women, 27 mg for pregnant women, 10 mg for breastfeeding women, and 8 mg for menopausal women. White beans, lentils, spinach, tofu, kidney beans, and chickpeas are rich sources of plant-derived iron. To further increase your iron intake, you can take an iron supplement with vitamin C to increase its absorption.

Increase Intake of L-Lysine

L-Lysine is an essential amino acid that plays a vital role in the health of your hair. L-Lysine promotes hair health through enhancing the absorption and retention of iron, increasing iron storage levels in your body. Studies have shown that iron supplementation with inadequate L-Lysine consumption does not increase iron stores in your body. Therefore, insufficient consumption of L-Lysine can lead to depleted iron stores in your body, resulting in hair loss due to iron deficiency. The daily requirement for L-Lysine consumption is 1,000 milligrams or 1 gram per day. Plant-derived sources of L-Lysine include soybeans, peas, lentils, kidney beans, and chickpeas.

Consume Sufficient Iodine

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Iodine is essential for optimal thyroid function and healthy hair as your thyroid hormones regulate the growth and repair of your hair follicles. Your thyroid glands use iodine to make thyroid hormones, which are responsible for cellular growth and repair, and metabolism regulation. Insufficient iodine intake leads to thyroid function disorder, which adversely affects the health of your hair follicles. The adverse effects of thyroid function disorder on the growth and maintenance of hair follicles can result in hair loss over time. Iodine is typically found in seafood and dairy products. As a result, vegan diets, in general, are insufficient in iodine. To increase your iodine intake on a vegan diet, use iodized salt, or consume plant-based sources of iodine, such as seaweed.

A vegan diet is a very healthy eating plan if it supplies your body with all the energy and nutrients it needs to perform its essential functions. Plenty of studies corroborate the health benefits of a well-balanced vegan diet, such as a decreased risk for obesity, heart disease, type-2 diabetes, hypertension, and high cholesterol. However, due to its severely restrictive regimen, the typical vegan diet wreaks havoc on your body and causes several adverse health effects, such as excessive hair loss. You can be vegan and still keep your hair if you eat a nutritious vegan diet to nourish your body and supply it with all the essential energy and nutrients it needs to perform its physiological functions optimally.

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