The Healthy Hair Diet: What to Eat, Drink and Avoid 

Key Takeaways

• The role of diet: A healthy diet can help to support hair and even slow hair loss. Hair follicles rely on a steady supply of nutrients to stay in their normal growth cycle. When the body is under stress or lacking key vitamins and minerals, increased shedding can occur.

• When nutrition helps: For people with true deficiencies, improving nutrition may help reduce hair loss and restore normal growth over time. 

• When diet isn’t enough: Genetic hair loss is driven by hormones and inherited follicle sensitivity, and no food or supplement can stop or reverse this process. In these cases, diet plays a supportive role, not a corrective one.

• A note on supplements: Use only when a deficiency is confirmed. Taking high doses of nutrient supplements “just in case” may not improve hair growth and may cause harm instead.
  
• When to seek help: If hair loss feels sudden, severe, or worrying, the most helpful step is to speak with a medical professional to identify the cause and choose the right next step.

Strong, shiny hair is an indicator of good health. Although genetics, hormones, and age also impact the integrity of your hair, nutrition remains one of the most modifiable factors affecting hair growth and hair loss.

Your hair is considered “non-essential” by the body. During periods of stress or under-nutrition, nutrients are directed to vital organs first. Hair growth slows as a result of this process, which is why hair shedding is often one of the first visible signs of a nutritional imbalance.¹

In this article, we will examine the vital nutrients for hair health, the foods you should incorporate into your routine, and provide a sample menu for your reference.  

How Diet Affects Hair Health

Your hair grows from tiny structures in the scalp called hair follicles. These follicles are among the most metabolically active cells in the body, meaning they require a steady supply of nutrients to function normally.

When key vitamins or minerals are lacking, the body prioritises essential organs such as the heart, kidneys and brain. Hair, which is not essential for survival, may shift into a resting phase during these times, triggering telogen effluvium, a form of temporary hair shedding caused by physical stress, illness, or nutrient deficiency.

This process, however, is very different from androgenetic alopecia (male or female pattern hair loss), which is driven by genetics and the hormone DHT (dihydrotestosterone). 

Key Nutrients for Healthy Hair

Below are some nutrients that play an important role in normal hair follicle function.² These molecules cannot provide “miracle cures” for hair loss, but deficiencies that are corrected can aid the hair growth cycle.

1. Protein

Hair is made up of keratin, a structural protein found similarly in nails and skin. Without enough protein in the diet, the body may slow hair production.³ 

Adults need about 0.8-1g of protein per kg of body mass per day. Low intake may lead to diffuse thinning and fragile hair strands.

2. Vitamins and Minerals

The vitamin and mineral deficiencies most often linked to hair shedding include iron (particularly in women between puberty and menopause), vitamin D, zinc, vitamin B12, and folate, with vitamin C also supporting iron absorption and collagen production.⁴

Low levels can lead to thinning hair, slow growth, and increased shedding by disrupting several vital functions, including the delivery of oxygen to hair follicles, the stimulation of new hair growth, and the synthesis of essential proteins.

3. Omega-3 Fatty Acids

These support scalp skin health and reduce inflammation. They do not directly grow hair, but may improve the scalp environment.

The Hair Growth Grocery List: Essential Nutrients

To move beyond generic advice, we have categorised the specific nutrients that act as “fuel” for the hair growth cycle.

Nutrient	Effect on Hair	Sources
Protein	The building block of hair	Lean meats, fish, poultry, beans, legumes
Omega-3 Fatty Acids	Nourishes and hydrates the scalp	Fatty fish such as salmon, walnuts and flaxseeds
Iron	Supports the hair growth cycle	Spinach, lentils, red meat
Vitamin A	Moisturises the scalp	Sweet potatoes, carrots, dark leafy greens
Biotin (Vitamin B7)	Supports keratin production, a key protein for hair	Eggs, almonds, cauliflower, cheese
Folic Acid (Vitamin B9)	Vital for new cell creation and hair growth	Leafy greens, citrus fruits, beans, fortified cereals
Vitamin C	Enhances iron absorption and is vital for collagen production	Citrus fruits, kale, strawberries, bell pepper, and tomatoes
Vitamin E	Protects hair from oxidative stress	Almonds, sunflower seeds, spinach, avocados
Zinc	Essential for hair tissue growth	Oysters, beef, pumpkin seeds
Selenium	Combats oxidative stress on hair follicles, preventing hair loss	Brazil nuts, seafood, and meats
Silica	Strengthens hair and increases thickness5	Bananas, leafy greens, rice, oats

‘Nutrition is incredibly important for hair growth. It is the foundation for a healthy body, mind and hair follicle. It is important to always correct any nutritional deficiencies or attempt to stabilise health conditions prior to considering hair transplant surgery, as results may fail without proper background health. Medications that boost hair growth and stabilise the scalp are also key when trying to combat genetic hair loss. In the end, for the best advice it is important to consult with your GP as well as hair specialists to determine the exact causes of your hair loss and the safest steps forward in your hair care journey.’

Dr Puroshini Pather, Hair Transplant Surgeon 

Hungry? 5 Tips to Incorporate Hair-Healthy Foods into Your Lifestyle

Start your day well:

• Oatmeal with seeds and berries, or eggs with spinach.

• Choose nutrient-dense snacks: Nuts and seeds are rich in vitamin E and zinc.

• Eat a variety of colours: Different fruits and vegetables provide different antioxidants and vitamins.

• Add omega-3s regularly: Fatty fish or flax/chia seeds support scalp health.

• Focus on iron at dinner: Lentils, spinach, chicken, or fish paired with vegetables.

Incorporating these nutrient-rich dietary habits not only supports your hair’s nutritional needs but also promotes overall health and well-being. Whether you follow a plant-based diet or include animal products, the essence lies in diversity and balance.

A Simple Recipe for Healthy Hair

Grilled salmon with avocado, spinach, tomatoes, walnuts, and lemon-olive oil dressing.

Plant-Based Alternative

Grilled tofu or tempeh marinated in flaxseed oil, lemon, and spices. Serve with the same salad base.

Do hair supplements really work, and when?

Supplements that stimulate hair growth, such as vitamin D or biotin, only help when there is a deficiency or when certain medical conditions affect hair growth.

Hence, these supplements can only be used in cases of confirmed deficiency (e.g., low iron, B12, vitamin D, or zinc). It is then essential to balance your lab findings with the dose and to follow a physician’s recommendations. 

Regardless, the best and most natural method to achieve hair growth is to first supplement through diet. 

When To See A Doctor 

If you are struggling with an itchy scalp, dandruff, or changes in hair texture, we recommend seeing your GP or a Trichologist (a specialist in scalp health).⁶ They will be able to assess the health of your body, skin and hair.

If your hair loss is permanent or genetic, such as a thinning crown or a receding hairline, this is a structural issue that diet cannot reverse. 

In these cases, discussing treatment options with a healthcare provider becomes even more essential. Beneficial options may include medications such as Minoxidil or Finasteride, or surgical procedures such as hair transplant surgery.

Conclusion

A healthy diet is the basis of healthy hair. The best evidence-based solution is not to seek miracle supplements but to return to balance and consistency. 

Add protein to all meals, bulk up on veggies and healthy fats, hydrate, take care of your body, and supplement only after testing for deficiencies.

Hair changes take time, and improvements in strength and scalp health are usually seen over several months. With consistent nourishment, most individuals will notice scalp health, hair strength, and shine develop in time.

References 

1. Goldberg LJ, Lenzy Y. Nutrition and hair [Internet]. Clin Dermatol. 2010;28(4):412-419 [cited 2025 Oct 23]. Available from: https://www.sciencedirect.com/science/article/abs/pii/S0738081X21000729.

2. Raman R. The 13 Best Foods for Hair Growth [Internet]. Healthline; 2024 Feb 5 [cited 2025 Oct 23]. Available from: https://www.healthline.com/nutrition/foods-for-hair-growth

3. Trüeb RM. “Let Food be Thy Medicine”: Value of Nutritional Treatment for Hair Loss. Int J Trichology. 2021 Nov-Dec;13(6):1–3. doi:10.4103/ijt.ijt_124_20. PMID: 34934293. PMCID: PMC8647708.

4. Almohanna HM, Ahmed AA, Tsatalis JP, Tosti A. The Role of Vitamins and Minerals in Hair Loss: A Review [Internet]. Dermatol Ther (Heidelb). 2018 Dec 13;9(1):51–70 [cited 2025 Oct 23]. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6380979/

5. Araújo LA, Addor F, Maia Campos PMBGC. Use of silicon for skin and hair care: an approach of chemical forms available and efficacy. An Bras Dermatol. 2016 May-Jun;91(3):331–335. doi:10.1590/abd1806-4841.20163986. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC4938278/

6. Cleveland Clinic. Hair Loss: Causes, Treatments and Prevention Options [Internet]. Cleveland (OH): Cleveland Clinic; [cited 2025 Oct 23]. Available from: https://my.clevelandclinic.org/health/diseases/21753-hair-loss