What to Eat for Hair Growth: The Nutrients Your Follicles Need

Your hair is a reflection of what you eat.

Hair follicles are among the most metabolically active cells in the body. They need a constant supply of nutrients to produce hair — and when that supply is inadequate, hair growth slows, shedding increases, and the hair that does grow is thinner and weaker.

No topical product can fully compensate for nutritional deficiencies. If your diet isn't supporting your follicles, your hair care routine is working against the odds. To understand the full picture of what drives hair loss — including nutritional causes — our Complete Guide to Hair Loss in South Africa is a useful reference.

Protein

Hair is made of keratin — a protein. Without adequate dietary protein, your body doesn't have the building blocks to produce hair. Protein deficiency is one of the most direct nutritional causes of hair loss and thinning.

How much: Most adults need 0.8–1.2g of protein per kilogram of body weight per day. Active people and those recovering from hair loss may benefit from the higher end of that range.

Best sources: Eggs, chicken, fish, lean red meat, legumes (lentils, chickpeas, beans), tofu, Greek yoghurt, cottage cheese.

Note: Eggs are particularly valuable — they contain both protein and biotin, two key nutrients for hair growth.

Iron and ferritin

Iron deficiency is one of the most common nutritional causes of hair loss in women. Your body uses iron to carry oxygen to follicles via red blood cells. Low iron = less oxygen to follicles = slower growth and increased shedding.

Ferritin (stored iron) is the more relevant measure for hair health. Aim for ferritin levels of 70–80 μg/L or above — significantly higher than the standard lab "normal" range.

Best sources of haem iron (most absorbable): Red meat, chicken, fish, shellfish (especially oysters and clams).

Best sources of non-haem iron: Lentils, spinach, tofu, pumpkin seeds, fortified cereals, dark chocolate.

Tip: Pair plant-based iron sources with vitamin C (citrus, peppers, tomatoes) to significantly improve absorption. Avoid tea, coffee, and calcium-rich foods at the same meal as iron-rich foods — they inhibit absorption.

Zinc

Zinc plays a critical role in hair follicle repair and the oil gland function that keeps the scalp healthy. Both zinc deficiency and zinc excess can cause hair loss — so supplementing without a confirmed deficiency isn't recommended.

Best sources: Oysters (the richest source), red meat, pumpkin seeds, hemp seeds, lentils, chickpeas, cashews.

Vitamin D

Vitamin D receptors are found in hair follicles, and deficiency is associated with hair loss — particularly alopecia areata and telogen effluvium. South Africans generally have good sun exposure, but deficiency is still common, particularly in people who spend most of their time indoors.

Best sources: Sunlight (15–20 minutes of direct sun exposure daily), fatty fish (salmon, sardines, mackerel), egg yolks, fortified foods. Supplementation is often necessary if levels are low.

Biotin (Vitamin B7)

Biotin is essential for keratin production and is one of the most marketed nutrients for hair growth. The honest truth: biotin deficiency is relatively rare, and supplementing with biotin when you're not deficient is unlikely to make a meaningful difference to your hair.

That said, if you are deficient — which can happen with certain medications, gut conditions, or very restrictive diets — correcting it can significantly improve hair health.

Best sources: Eggs (especially the yolk), salmon, liver, sunflower seeds, sweet potato, almonds.

Omega-3 fatty acids

Omega-3s reduce scalp inflammation, support the oil glands that keep the scalp moisturised, and are associated with improved hair density and reduced shedding in some studies.

Best sources: Fatty fish (salmon, sardines, mackerel, trout), flaxseeds, chia seeds, walnuts, hemp seeds. Fish oil supplements are a reliable option if dietary intake is low.

Vitamin C

Vitamin C is essential for collagen production — which supports the hair shaft structure — and significantly improves iron absorption from plant-based sources. It's also an antioxidant that protects follicles from oxidative stress.

Best sources: Bell peppers (especially red), citrus fruits, guava, kiwi, strawberries, broccoli.

What about hair supplements?

Hair supplements can be useful — but only if they're addressing a real deficiency. Taking a biotin supplement when your biotin levels are fine won't give you better hair. Getting a blood test first tells you exactly what you need.

If you do supplement, look for formulas that include iron, zinc, vitamin D, and biotin rather than just biotin alone. And always check with your doctor before starting supplements, particularly iron.

Our recommendation at Partners Hair

Nutrition is the foundation that everything else builds on. If you're investing in hair loss products but not addressing your diet, you're working with one hand tied behind your back. Our team can point you toward the right products to complement a nutrition-focused approach — visit us in salon or shop online across South Africa.

Frequently Asked Questions

What foods are best for hair growth?

Eggs, fatty fish, red meat, lentils, spinach, pumpkin seeds, and citrus fruits cover most of the key nutrients for hair growth: protein, iron, zinc, omega-3s, biotin, and vitamin C.

Can diet alone stop hair loss?

If hair loss is caused by nutritional deficiency, correcting the deficiency through diet and supplementation can significantly reduce shedding and support regrowth. If hair loss has other causes (hormonal, genetic), diet supports but doesn't replace targeted treatment.

Do biotin supplements help hair growth?

Only if you're deficient in biotin. For most people with adequate biotin levels, supplementing won't make a meaningful difference. Get a blood test before investing in supplements.

How long does it take for dietary changes to affect hair growth?

Hair grows slowly — about 1cm per month. Nutritional improvements typically take 3–6 months to show up as visible changes in hair quality and density.

Where can I get hair growth advice in South Africa?

Book a scalp consultation at Partners Hair. Our team can help you identify the right combination of products and lifestyle changes for your specific hair loss situation, available in our salons across South Africa.