Quick summary: Why Do Hair Fall Out More in Winter?

• Hair tends to fall out more in winter due to cold weather, dry indoor air, temperature changes and reduced scalp microcirculation. 
• Poor diet, vitamin D3 deficiency and frequent infections further weaken hair follicles. 
• Wearing non-breathable hats and increased stress can intensify the problem. 
• Proper hair care, hydration, supplementation and a nutrient-rich diet help reduce seasonal hair shedding. 

Hair shedding is a natural process — we lose between 50 and 100 hairs every day, and this is completely normal. However, many people notice that hair loss increases significantly during winter. Questions arise: Why does this happen? Is it a sign of a health issue? Or is the weather to blame? Winter months bring a range of changes to how our body functions, and hair — as one of the most sensitive “health barometers” — quickly reflects these changes. In this article, I explain why hair tends to fall out more in winter and what you can do to slow down this seasonal process.

1. Cold wind and low temperatures weaken hair follicles

During winter, your scalp is exposed to constant temperature fluctuations: freezing air outside, warm and dry air inside.
These rapid transitions result in:

• weakened microcirculation in the scalp
• slower delivery of nutrients to hair follicles
• disrupted hair growth cycles

Hair follicles that receive insufficient nourishment enter the resting phase (telogen) earlier, which leads to noticeable shedding.

2. Dry indoor air worsens scalp condition

Heating systems dry the air significantly, which leads to:

• tight, dehydrated scalp
• irritation, flaking and increased risk of dandruff
• damaged hydrolipid barrier

A dry scalp often overproduces sebum in response. Both extremes — skin that is overly dry or excessively oily — create conditions that weaken hair and contribute to increased shedding.

3. Wearing hats affects your hair… but not always negatively

Hats protect against cold, so they are necessary.
However, they can become a problem when:

• made from synthetic, non-breathable fabrics
• they cause overheating of the scalp
• lead to friction and static
• encourage the growth of fungi (like Malassezia) associated with dandruff

An overheated scalp produces more sebum, which can contribute to irritation and indirectly weaken hair roots.

4. Winter places additional stress on the body

Shorter days, lack of sunlight and cold weather change how the body functions.
During winter, many people experience:

• mood drops
• chronic stress
• lower motivation and energy levels

Stress is one of the most common triggers of telogen effluvium — a condition where large amounts of hair shift into the resting phase. Even if stress occurs now, hair loss may become noticeable 2–3 months later, making winter shedding often a delayed response to autumn fatigue.

5. Vitamin and mineral deficiencies intensify hair loss

Winter often brings a less varied diet and fewer fresh fruits and vegetables. The most common deficiencies include:

• vitamin D3 — crucial for hair follicle function
• iron — low levels can lead to anemia and hair loss
• biotin and B vitamins — essential for healthy hair growth
• zinc and selenium — key minerals supporting strong roots

While such deficiencies may not show immediate symptoms, hair responds to them quickly.

6. Winter diet contributes to weakened hair

In colder months, we tend to choose:

• heavy, fatty meals
• processed foods
• sugary snacks
• convenience food

High sugar intake and low nutritional value increase inflammation, worsen scalp condition and affect hair quality. At the same time, people usually drink less water in winter, which leads to dehydration — affecting the body and the hair itself.

7. Winter infections and medications can also cause hair shedding

Viral infections, fever and antibiotic therapy common in winter weaken the body. When fighting illness, the body redirects energy away from less essential functions — including hair growth. As a result, hair follicles may enter the shedding phase faster.

8. How to reduce hair loss in winter?

Here are practical steps that can help minimize seasonal shedding:

Keep your scalp hydrated

Use:

• emollient conditioners
• moisturizing tonics or serums
• light oils on the ends

Choose the right type of hat

Ideal materials include:

• merino wool
• cotton
• cashmere
• viscose

Avoid synthetic, tight-fitting hats.

Supplement vitamin D3

Levels drop naturally in winter. Testing your blood levels allows for precise supplementation.

Increase water intake

Hydration benefits the scalp as well. Aim for at least 1.5 liters a day.

Improve your diet

Add more:

• oily fish
• nuts and seeds
• eggs
• root vegetables
• whole grains
• leafy greens

Use stimulating scalp treatments

Effective ingredients include:

• caffeine
• niacinamide
• peptides
• ginseng extract

Avoid hot blow-drying

High temperatures worsen dryness and hair fragility.

9. When should you see a specialist?

You should consult a trichologist or dermatologist if hair loss:

• is intense
• lasts longer than 2–3 months
• is accompanied by itching, burning or dandruff
• leads to visible thinning
• causes receding hairline or patchy loss

Professional diagnosis often includes scalp imaging and blood tests to identify underlying causes.

Summary

Winter hair loss is influenced by multiple factors: cold weather, diet changes, vitamin deficiencies, scalp dryness and stress. While the process is natural, it can be reduced by proper scalp care, hydration, nutrition and lifestyle adjustments. If shedding persists or worsens, seeking professional advice is essential.

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