Brenda Khan
Male pattern baldness, also known as androgenetic alopecia, is the most common type of hair loss in men, affecting about 50% of men over 50 and 55% of women over 80. While the primary causes of male pattern baldness are genetic and hormonal, there is some evidence to suggest that dietary factors, such as high sugar intake, can exacerbate hair loss. In recent years, the ketogenic (keto) diet has gained popularity for weight loss and improved health markers. However, some keto dieters have reported experiencing hair thinning or increased shedding, raising concerns about a potential link between the keto diet and hair loss. While no large-scale studies have found a direct causal relationship, certain aspects of the keto diet, such as nutrient deficiencies, metabolic shifts, and stress responses, may contribute to increased hair shedding, particularly during the initial adaptation period.
| Characteristics | Values |
|---|---|
| Ketogenic diets and hair loss | The link between ketogenic diets and hair loss remains inconclusive. While certain aspects of the diet might theoretically increase shedding, current evidence does not support a definitive causal relationship. However, some keto dieters report experiencing hair thinning or increased shedding. |
| Nutritional deficiencies | The keto diet restricts carbohydrates, limiting the number of nutrients one may get. Nutritional deficiencies that may occur include fiber, calcium, magnesium, iron, zinc, biotin, folate, selenium, and vitamins A, C, D, and E. |
| Impact on hair health | The keto diet may impact hair health by changing the condition of the hair. This can include hair thinning or increased shedding, particularly during the initial adaptation period. |
| Prevention of hair loss | To prevent hair loss, it is recommended to tweak the foods eaten and increase the intake of certain vitamins. Taking supplements such as fiber, calcium, magnesium, and vitamin D can help compensate for lost nutrients. Eating nutrient-dense foods and managing stress may also be beneficial. |
| Regrowth after hair loss | If hair loss occurs due to diet-related stress or deficiencies, regrowth is likely to be seen within 3-6 months after correcting the issue. |
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Nutritional deficiencies
The keto diet's emphasis on high-fat, low-carb foods can result in a lower intake of certain nutrients typically obtained from high-carb fruits and vegetables. For example, citrus fruits and berries are excellent sources of vitamin C, but they are typically avoided or consumed in small portions on a keto diet. Similarly, dairy and cereal are good sources of vitamin D but are high in carbs and therefore not keto-friendly.
To mitigate these risks, individuals on a keto diet may need to supplement their nutrient intake. For instance, vitamin D supplements can be taken to meet daily requirements. Additionally, many keto-approved foods contain enough iron, such as beef, oysters, kale, and spinach. However, the keto diet restricts other sources of iron, like cereal, lentils, tofu, and beans. In such cases, iron supplements may be necessary to prevent deficiency.
It is important to consult a healthcare provider before starting any supplements, as they are minimally regulated and may not be suitable for everyone. Working with a doctor or accredited dietitian can help ensure individuals on a keto diet are getting the right vitamins and minerals their bodies need.
While nutritional deficiencies can be a concern on a keto diet, addressing these deficiencies can help improve hair health. By increasing the intake of certain vitamins and nutrients, individuals may be able to lower their risk of hair loss and promote healthy hair growth.
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Insulin release
While there is no direct link between ketogenic diets and hair loss, high-sugar diets have been linked to androgenetic alopecia, also known as male or female pattern baldness. A high sugar intake leads to insulin release, which stimulates the body to produce testosterone, which can be converted into dihydrotestosterone (DHT)—a hormone that causes androgenetic alopecia.
Ketogenic diets are low-carb, high-fat diets that aim to force the body to use ketone bodies for energy instead of glucose. Insulin is a hormone that metabolises carbohydrates, and the more carbohydrates one consumes, the more insulin is required to process it. Thus, ketogenic diets minimise insulin production by restricting carbohydrates and protein.
There is evidence that ketogenic diets improve insulin sensitivity and reduce insulin resistance, particularly in individuals with obesity. One study found that a 3-week ketogenic diet increased skeletal muscle insulin sensitivity in individuals with obesity. Another study showed that just 6 days of a low-carb ketogenic diet improved insulin sensitivity by 53%. However, it is important to note that the long-term effects of ketogenic diets on insulin resistance are still unclear. Some sources suggest that while ketogenic diets can improve insulin resistance in the short term, they may actually cause insulin resistance in the long term.
To summarise, while ketogenic diets may not directly cause hair loss, they can help reduce insulin release and improve insulin sensitivity, particularly in obese individuals or those with insulin resistance. However, it is important to be cautious as there are conflicting opinions on the long-term effects of ketogenic diets on insulin resistance.
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Stress
While there is limited information establishing a direct link between ketogenic diets and hair loss, some insights suggest that the diet may contribute to increased shedding, particularly during the initial adaptation period. This is because a significant change in diet can create stress on the body as it adjusts to the absence of certain nutrients it was previously receiving, forcing the body to prioritise keeping essential organs functioning over non-essential processes such as hair growth.
Ketogenic diets can also increase cortisol and thyroid hormone output to release stored glucose. This stress response, coupled with low insulin levels resulting from carb restriction, could potentially exacerbate alopecia symptoms in individuals genetically predisposed to hormonally driven baldness. Furthermore, critics argue that the restriction of grains, fruits, and certain vegetables on very low-carb diets can lead to deficiencies in key nutrients like iron, zinc, biotin, folate, selenium, and vitamins A, C, D, and E over extended periods.
To minimise hair loss, it is important to manage stress and ensure adequate nutrient intake. This can be achieved by including nutrient-rich foods like eggs, fatty fish, nuts, seeds, and leafy greens in your diet to ensure adequate vitamins, minerals, and protein. Additionally, hair loss caused by keto is typically temporary, with regrowth starting 3–6 months after addressing deficiencies and stress.
It is worth noting that extreme calorie restriction, nutritional deficits, and high-stress levels can prolong keto-related hair thinning. Therefore, it is recommended to slowly reduce carbs rather than lowering them suddenly and to consult a doctor before starting a ketogenic diet.
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Calorie intake
Calorie restriction and nutrient deficiencies are common factors in hair loss. When you reduce your calorie intake, your body responds by prioritising essential functions such as cell growth and organ function, leaving less energy for hair growth. This can lead to thinning hair and increased shedding, particularly during the initial adaptation period of a ketogenic diet.
The ketogenic diet is often associated with rapid weight loss, which can be a contributing factor to hair loss. When the body experiences significant weight loss, it can enter a state of metabolic shock, disrupting the normal hair growth cycle and resulting in temporary hair shedding. This is known as telogen effluvium, a type of stress-induced hair loss.
Low-carbohydrate diets, such as the ketogenic diet, may also impact hair health by reducing the intake of essential nutrients necessary for hair growth. These include biotin, protein, and iron, as well as vitamins A, C, D, and E. The restriction of grains, fruits, and certain vegetables on very low-carb diets can lead to deficiencies in these key nutrients over extended periods.
However, it is important to note that the link between the ketogenic diet and hair loss is not definitive. While some individuals may experience increased shedding, it is not universally accepted that the diet directly causes hair loss. The impact of the diet on hair health may depend on various factors, including the specific foods consumed and the presence of any underlying health conditions.
To minimise the risk of hair loss while on a ketogenic diet, it is crucial to ensure adequate nutrient intake. This can be achieved by including nutrient-rich foods such as eggs, fatty fish, nuts, seeds, and leafy greens in your diet. Additionally, supplements can be considered to make up for any deficiencies in your diet. Maintaining a balanced diet and managing stress are important factors in promoting healthy hair growth and minimising hair loss.
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Weight loss
The keto diet involves significantly reducing carbohydrate intake and increasing fat consumption, which leads to a metabolic state called ketosis where the body burns fat for fuel instead of carbohydrates. This shift in fuel source can trigger a stress response in the body, and when coupled with low insulin levels from carb restriction, it could potentially worsen alopecia symptoms in individuals predisposed to hormonally driven baldness. Additionally, rapid weight loss due to a calorie deficit can temporarily induce hair shedding.
The link between the keto diet and hair loss is not yet fully understood. While some keto dieters report hair thinning and increased shedding, there is currently no conclusive scientific evidence directly linking the keto diet to accelerated hair loss. However, the restriction of certain food groups on a very low-carb diet can lead to deficiencies in essential nutrients, which may contribute to hair shedding.
To mitigate the potential impact of the keto diet on hair health, it is crucial to ensure adequate nutrient intake. The keto diet may result in deficiencies of specific vitamins and minerals, including biotin, iron, zinc, folate, selenium, and vitamins A, C, D, and E. Addressing these potential deficiencies through supplementation or a well-balanced keto approach may help reduce the risk of hair loss.
Additionally, it is important to note that hair loss due to diet-related stress or deficiencies is typically reversible. Correcting nutrient deficiencies and managing stress can lead to hair regrowth within 3 to 6 months. However, genetic hair loss, such as androgenetic alopecia, is irreversible and may require other interventions, such as scalp micropigmentation or hair transplants.
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Frequently asked questions
The link between ketogenic diets and hair loss remains inconclusive. While there is no large-scale evidence that keto diets cause hair loss, some keto dieters report experiencing hair thinning or increased shedding.
A ketogenic diet restricts carbohydrates, limiting the number of nutrients one may get. This can lead to deficiencies in key nutrients like iron, zinc, biotin, folate, selenium, and vitamins A, C, D, and E. The body responds to reduced calorie intake by directing energy to the most vital functions, such as organ function and cell growth, leaving less energy for hair growth.
Ensure you eat plenty of keto-friendly foods rich in fibre, magnesium, calcium, iron, and vitamin D. You can also consider taking supplements to make up for any deficiencies. Additionally, try to slowly reduce carbs instead of lowering them suddenly, as extreme diets are more likely to cause hair thinning.
Foods that are good sources of vitamin A, such as meat, eggs, dairy, and fish, are keto-friendly. Fatty fish like salmon and tuna, as well as eggs, are good sources of vitamin D. Biotin is available in some keto-friendly foods, such as nuts, seeds, and cauliflower, but it is also available as a supplement.
