Noticing more hair on your pillow, in the shower or on your hairbrush?

Hair fall can be concerning, especially when it continues for weeks or you begin noticing visible thinning.

But not every type of hair shedding means permanent hair loss.

Hair fall can have several causes, including genetics, hormonal changes, stress, nutritional deficiencies, certain medical conditions and scalp disorders.

Understanding the cause is the first step towards choosing an appropriate approach.

In this guide, we’ll explore common hair fall causes in women and men, the role of vitamins and minerals, diet, hair-care habits and evidence-based treatment options.

Is Hair Fall Normal?

Yes. Hair naturally moves through a cycle of growth, transition, rest and shedding.

Losing approximately 50–100 hairs per day is commonly considered normal, although the number varies.

You may notice more hairs after washing or brushing, particularly if you have long hair or wash it less frequently.

However, persistent excessive shedding, widening of the hair part, bald patches or noticeable loss of density may require evaluation.

Hair Fall vs Hair Loss: What’s the Difference?

Hair shedding and hair loss are related but not identical.

Hair shedding refers to hairs falling out as part of the hair cycle. Excessive shedding can occur when more follicles enter the resting phase.

Hair loss may involve progressive thinning, reduced hair growth or damage to hair follicles.

The distinction matters because different causes require different management.

10 Common Causes of Hair Fall

1. Genetics

Hereditary hair loss, also known as androgenetic alopecia, is one of the most common causes of progressive hair thinning.

In men, it often causes a receding hairline or thinning at the crown.

In women, it commonly appears as widening of the central hair part or reduced density over the top of the scalp.

Genetic hair loss may require medical treatment.

2. Stress

Significant physical or emotional stress can trigger a type of shedding called telogen effluvium.

Possible triggers include:

• Major illness
• Surgery
• High fever
• Significant emotional stress
• Rapid weight loss
• Severe nutritional restriction

Shedding often begins several weeks to months after the triggering event.

In many cases, it improves after the underlying trigger resolves, although recovery can take time.

3. Iron Deficiency

Iron deficiency can contribute to hair shedding in some individuals.

Women with heavy menstrual bleeding may be at increased risk of low iron stores.

However, hair fall does not automatically mean iron deficiency.

A healthcare professional may recommend blood tests when appropriate.

4. Thyroid Disorders

Both hypothyroidism and hyperthyroidism can affect hair growth.

Thyroid-related hair changes may occur alongside symptoms such as fatigue, changes in weight or temperature intolerance.

Diagnosis requires appropriate clinical assessment.

5. Hormonal Changes

Hormonal changes can influence the hair cycle.

Examples include:

• Pregnancy and postpartum changes
• Menopause
• Certain endocrine disorders
• Polycystic Ovary Syndrome (PCOS)

The pattern and cause of hair loss should be assessed individually.

6. Nutritional Deficiencies

Hair growth depends on adequate nutrition.

Deficiencies in protein, iron, zinc and certain other nutrients can contribute to hair problems.

However, taking high-dose vitamins when no deficiency exists does not guarantee improved hair growth.

7. Scalp Conditions

Some scalp disorders can contribute to shedding, breakage or inflammation.

Examples include:

• Seborrhoeic dermatitis
• Scalp psoriasis
• Fungal infections
• Certain inflammatory hair disorders

Persistent itching, redness, scaling, pain or scarring requires medical evaluation.

8. Tight Hairstyles

Repeated tension from tight hairstyles can damage hair follicles over time.

This condition is known as traction alopecia.

Avoiding prolonged pulling on the hair can help reduce this risk.

9. Certain Medications

Some medicines can contribute to hair shedding.

Do not stop prescribed medication without consulting your healthcare professional.

10. Rapid Weight Loss or Restrictive Dieting

Severe calorie restriction and inadequate protein intake may disrupt normal hair growth.

A sustainable, nutritionally adequate eating pattern is preferable to crash dieting.

Hair Fall Causes in Women

Women may experience hair shedding or thinning due to several factors.

Common possibilities include:

• Female-pattern hair loss
• Iron deficiency
• Thyroid disorders
• Postpartum shedding
• PCOS-related androgen activity
• Stress-related telogen effluvium
• Nutritional deficiencies

A widening hair part or progressive thinning should be evaluated rather than attributed automatically to vitamin deficiency.

Hair Fall Causes in Men

Common causes include:

• Male-pattern hair loss
• Stress-related shedding
• Certain medical conditions
• Scalp disorders
• Nutritional deficiencies
• Medication-related changes

Male-pattern hair loss is often genetically influenced and should not be confused with temporary shedding.

Can Vitamin Deficiency Cause Hair Fall?

Certain nutritional deficiencies may contribute to hair shedding.

However, the relationship between supplements and hair growth is frequently overstated.

Let’s examine some commonly discussed nutrients.

1. Biotin and Hair Health

Biotin is a B vitamin involved in normal nutrient metabolism.

Severe biotin deficiency can cause hair thinning, but true deficiency is uncommon in people consuming a varied diet.

There is limited evidence that additional biotin improves hair growth in people who already have adequate biotin status.

High-dose biotin supplements can also interfere with certain laboratory tests.

2. Vitamin D and Hair Loss

Vitamin D has been investigated in relation to some hair-loss conditions.

Low vitamin D levels may be observed in certain patient groups.

However, this does not prove that taking vitamin D supplements will reverse hair loss.

Testing and supplementation should be guided by individual risk and clinical assessment.

3. Iron and Hair Fall

Iron deficiency may contribute to hair shedding in some people.

Foods containing iron include:

• Lentils
• Beans
• Green leafy vegetables
• Meat and seafood
• Fortified foods

Iron supplements should not be taken unnecessarily because excess iron can be harmful.

4. Zinc and Hair Growth

Zinc is involved in normal cell function and protein synthesis.

Severe zinc deficiency can contribute to hair changes.

However, excess zinc supplementation may cause adverse effects and can interfere with copper status.

5. Protein and Hair Health

Hair is primarily composed of keratin, a structural protein.

Inadequate protein intake can affect normal hair growth.

Include appropriate protein sources such as dal, paneer, tofu, eggs, dairy, fish or other foods according to your dietary preferences.

Best Foods for Healthy Hair

A balanced diet supports normal hair growth by providing energy, protein, vitamins and minerals.

Food	Nutritional contribution
Eggs	Protein and several micronutrients
Lentils	Protein, iron and folate
Paneer	Protein and calcium
Nuts and seeds	Healthy fats and minerals
Whole fruits	Vitamins and plant compounds
Leafy vegetables	Folate and other micronutrients
Fish	Protein and selected fatty acids
Tofu	Plant protein

No single food has been proven to prevent every type of hair loss.

Indian Diet Plan for Hair Wellness

Here is a general example of a balanced daily eating routine.

Meal	Example
Breakfast	Besan chilla with curd
Mid-morning	Seasonal fruit and nuts
Lunch	Roti, dal, vegetables and salad
Evening	Roasted chana
Dinner	Paneer/tofu, vegetables and rice or roti

Individual nutritional requirements vary.

Hair Fall Due to Stress: Can Hair Grow Back?

Stress-related telogen effluvium is often temporary.

Once the underlying trigger is addressed, shedding may gradually improve.

However, recovery can take several months.

Persistent shedding should be evaluated to rule out other causes.

Hair Fall After Pregnancy

Postpartum hair shedding is common.

Hormonal changes after childbirth can cause more hairs to enter the shedding phase.

This often becomes noticeable a few months after delivery.

In many cases, hair density improves over time.

However, persistent or severe hair loss may require evaluation for nutritional or medical causes.

PCOS and Hair Thinning

Some women with PCOS experience androgen-related scalp hair thinning.

PCOS may also involve irregular periods, acne and increased facial hair growth.

Managing PCOS requires an individualised approach involving appropriate medical care and lifestyle support.

Nutritional supplements alone should not be expected to reverse androgen-related hair loss.

Does Oiling Stop Hair Fall?

Hair oiling may help improve the feel of hair and reduce friction or dryness in some people.

However, applying oil has not been proven to treat hereditary hair loss or correct underlying hormonal causes.

Avoid harsh rubbing or aggressive scalp massage.

Does Shampoo Cause Hair Fall?

Routine shampooing does not normally cause hair follicles to stop growing.

You may notice naturally shed hairs during washing.

However, harsh treatments, excessive heat and mechanical damage can contribute to hair breakage.

Choose hair-care products according to scalp and hair needs.

How to Reduce Hair Breakage

Hair breakage differs from hair shedding at the root.

Practical steps include:

• Avoid excessively tight hairstyles
• Limit unnecessary heat styling
• Use gentle detangling techniques
• Avoid harsh chemical treatments
• Maintain appropriate scalp hygiene
• Seek professional advice for persistent scalp symptoms

Hair Fall Treatment: What Actually Works?

Treatment depends on the cause.

For hereditary pattern hair loss, a dermatologist may discuss evidence-based treatments such as topical minoxidil and, in appropriate patients, prescription medicines.

For nutritional deficiencies, correcting the deficiency may be important.

For scalp infections or inflammatory conditions, targeted treatment may be required.

For telogen effluvium, identifying and addressing the triggering factor is often central to management.

There is no single treatment that works for every type of hair loss.

When Should You See a Dermatologist?

Consider professional evaluation if you experience:

• Sudden or severe hair shedding
• Patchy hair loss
• Progressive thinning
• Scalp redness, pain or scarring
• Persistent itching or scaling
• Hair loss accompanied by other unexplained symptoms

Early evaluation is particularly important for conditions that may cause permanent follicle damage.

Can Supplements Help Hair Growth?

Supplements may be useful when a specific nutritional deficiency or inadequate intake is identified.

However, evidence for routine hair-growth supplements in otherwise well-nourished people is limited.

Before purchasing a supplement, check:

• Ingredient list
• Nutrient quantities
• Recommended serving
• Relevant safety warnings
• Potential interactions
• Whether the product matches your actual nutritional needs

Avoid products promising guaranteed hair regrowth or permanent prevention of hair loss.

Building a Healthy Hair-Care Routine

A simple routine is often more useful than frequently changing products.

Morning

Eat a balanced breakfast and avoid tight hairstyles.

Afternoon

Stay hydrated and maintain adequate nutrition.

Evening

Handle hair gently and avoid unnecessary heat damage.

Night

Maintain a consistent sleep schedule and follow any prescribed treatment.

Remember that hair growth occurs gradually.

Common Hair Fall Myths

Myth: Hair Fall Always Means Vitamin Deficiency

False. Genetics, hormones, scalp conditions and other factors can contribute.

Myth: Cutting Hair Makes It Grow Faster

False. Trimming changes the appearance of hair ends but does not alter follicle growth rate.

Myth: Oiling Can Cure Male-Pattern Baldness

False. Hair oil is not an established treatment for androgenetic alopecia.

Myth: Every Hair Supplement Causes Regrowth

False. Supplement benefits depend on nutritional status, formulation and the cause of hair loss.

Myth: Washing Hair Causes Baldness

False. Routine washing does not cause hereditary baldness.

Frequently Asked Questions About Hair Fall

What is the most common cause of hair fall?

Common causes include hereditary pattern hair loss and temporary excessive shedding. The cause depends on the individual’s symptoms and hair-loss pattern.

Can stress cause hair fall?

Yes. Significant stress or illness can trigger telogen effluvium.

Which vitamin deficiency causes hair fall?

Certain deficiencies, including severe biotin deficiency and other nutritional deficiencies, may contribute. However, hair fall cannot be diagnosed from symptoms alone.

Is biotin good for hair growth?

Biotin is important for normal metabolism, but evidence for extra biotin in people without deficiency is limited.

Can low iron cause hair loss?

Iron deficiency may contribute to hair shedding in some individuals.

Does vitamin D help hair growth?

Vitamin D has been studied in hair-loss conditions, but supplementation is not a guaranteed hair-regrowth treatment.

Can hair grow back after stress-related shedding?

Often, yes. Recovery depends on the cause and may take several months.

Is hair fall after pregnancy normal?

Temporary postpartum shedding is common, although severe or persistent changes should be evaluated.

Can PCOS cause hair thinning?

Yes. Some women with PCOS experience androgen-related scalp hair thinning.

When should I consult a doctor for hair fall?

Seek evaluation for sudden, patchy, progressive or persistent hair loss, especially when accompanied by scalp symptoms.

Final Thoughts

Hair fall is common, but its causes vary considerably.

Genetics, hormonal changes, stress, nutritional deficiencies and scalp conditions can all influence hair growth.

The most effective approach begins with identifying the underlying cause.

Balanced nutrition, gentle hair care and appropriate medical treatment can support long-term hair and scalp health.

Avoid relying on supplements or home remedies as guaranteed treatments for hair loss.

For more educational information about hair and scalp wellness, explore NutraMarck’s Hair & Scalp Wellness category.

References

1. American Academy of Dermatology — Hair Loss
2. NHS — Hair Loss
3. NIH Office of Dietary Supplements — Biotin
4. NIH Office of Dietary Supplements — Zinc
5. NIH Office of Dietary Supplements — Vitamin D

Medical Disclaimer: This article is for general educational purposes only and does not replace professional medical advice. Persistent or progressive hair loss should be evaluated by an appropriate healthcare professional. Nutritional supplements should not replace diagnosis or established treatment.