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Hair Loss After Weight Loss: Causes and Solutions

Hair Loss After Weight Loss: Causes and Solutions

Isabelle Lederer

6 min

May 27, 2024

Dramatic weight loss is often the result of hard work and determination. However, while you may be thrilled about shedding those pounds, an unexpected side effect can occur: hair loss. Many people in Switzerland and around the world report experiencing hair loss after rapid or significant weight loss. In this blog post, we will explore the reasons for this type of hair loss and show you how to counteract it.

Why Does Hair Loss Occur After Weight Loss?

Hair loss after weight loss, also known as Telogen Effluvium, is often a result of stress on the body. This stress can be caused by several factors:

  • Nutritional Deficiencies: A drastic reduction in calorie intake can lead to a deficiency in essential nutrients. Vitamins and minerals such as iron, zinc, vitamin D, biotin, and amino acids are crucial for healthy hair growth. A deficiency in these nutrients can disrupt the hair growth cycle and cause hair loss. Iron deficiency is a common cause of hair loss.
  • Hormonal Changes: Weight loss can trigger hormonal changes that affect the hair growth cycle. Diets that promise rapid weight loss can disrupt hormonal balance, leading to hair loss.
  • Stress: Any form of physical or emotional stress can cause hair loss. Rapid weight loss is a significant physical stressor, which can lead to increased hair shedding.
  • Certain Medications: Some people use medications during their weight loss journey, which can also have hair loss as a side effect. It's important to be aware of the potential side effects of the medications you are taking and discuss alternatives with your healthcare provider.
  • Crash Diets and Restrictive Diets: These types of diets often lead to severe nutrient deficiencies and metabolic changes that can contribute to hair loss. Crash diets, in particular, are known to deprive the body of essential nutrients needed for healthy hair growth.

How to Counteract Hair Loss After Weight Loss

Even though hair loss after weight loss can be alarming, there are measures you can take to minimize hair loss and promote hair growth:

Balanced Diet:

Ensure that your dietary changes include all the necessary nutrients. A balanced diet rich in proteins, vitamins, and minerals is crucial for healthy hair. Foods rich in amino acids, fatty acids, and keratin are especially beneficial. Make sure you get enough protein and include foods high in iron, vitamin A, and folic acid, as these are vital for hair follicle health.


After consulting with a healthcare provider or nutritionist, supplements can help fill nutritional gaps. Biotin, zinc, iron, and other micronutrients are known to support hair growth. Nutritional supplements can help address any deficiencies and counteract malnutrition.

Gentle Hair Care:

Avoid aggressive hair care products and methods. Use gentle shampoos and conditioners, and consider regular scalp massages to improve blood circulation. Scalp massages can also stimulate hair follicles and support the regrowth of new hair.

Mental Health:

Techniques for managing stress, such as yoga, meditation, and regular physical activity, can help reduce both physical and emotional stress, thereby preventing hair loss. Reducing stress can stabilize the entire hair growth cycle, leading to healthier hair.

Professional Advice:

If hair loss persists or is severe, you should consult a dermatologist or trichologist. These experts can provide a precise diagnosis and personalized treatment plans. In some cases, specific medications such as minoxidil may be recommended. A healthcare provider can also check for other health issues, such as thyroid imbalances or hormonal changes during menopause, that might be contributing to your hair loss.

Nutritional Counseling:

Professional nutritional counseling can help you develop a diet that includes all the necessary nutrients without compromising your weight loss goals. A balanced diet is essential to avoid deficiencies, which are often the most common causes of hair loss.

Long-Term Hair Care:

Remember that continuous care for your hair is necessary. Use high-quality hair products tailored to your specific needs. Regular visits to a hair care specialist who focuses on healthy hair can also be beneficial.

Frequently Asked Questions

What is Telogen Effluvium?

Telogen Effluvium is a common type of hair loss where a large number of hair follicles enter the resting phase (telogen phase), leading to diffuse hair shedding. This condition often occurs after physical or emotional stress, such as rapid weight loss.

How long does it take for hair to regrow?

In most cases, hair starts to regrow within six months after the end of the weight loss or stress phase. It is important to be patient and provide your body with the necessary nutrients to support the hair regrowth process.

What role does diet play in hair loss?

A balanced diet is crucial for healthy hair. Deficiencies, particularly in vitamin A, iron, or other essential nutrients, can cause hair loss. A diet rich in vitamins, minerals, and with a balanced protein intake can promote hair growth and prevent hair loss.

Can bariatric surgery or weight loss surgery cause hair loss?

Yes, bariatric surgeries such as gastric bypass or sleeve gastrectomy can lead to nutrient deficiencies that cause hair loss. These surgeries can affect nutrient absorption, leading to deficiencies that negatively impact hair growth.

Is hair loss after weight loss temporary?

In most cases, hair loss after weight loss is temporary. With the right nutrition and care, hair growth can normalize. It is important to provide your body with all the necessary nutrients during and after a weight loss journey. Certain hair loss treatments like autologous blood treatment can also help to regrow your hair.

Can hair loss be hereditary?

Yes, hereditary hair loss (alopecia) can be triggered by a variety of factors, including hormonal changes and nutrient deficiencies. It is important to identify the cause of hair loss to choose the right treatment method.

What to do about bald spots?

If you notice bald spots, it is important to act quickly. These can be caused by hereditary hair loss, severe hair loss, or other health issues. A visit to a dermatologist can help determine the cause and find an appropriate treatment.

How does obesity affect hair loss?

Obesity can increase the risk of nutrient deficiencies, which in turn can cause hair loss. A healthy weight loss, accompanied by a balanced diet, can help minimize the risk and improve overall well-being.


Hair loss after weight loss is a common but often temporary issue. With the right nutrition, proper care, and stress-reducing measures, you can minimize the risk and help your hair become strong and healthy again. Remember, a slow and steady weight loss is healthier and has fewer negative impacts on your body, including your hair.

Book a free hair analysis for more insights on your hair health. Our experts are always available to answer your questions and help you achieve your hair goals.

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