What Vitamin Deficiencies Can Cause Hair Loss: Exploring Nutritional Causes

Written by Our Editorial Team
Last updated

A balanced diet supplying adequate vitamins and minerals is essential for maintaining healthy, growing hair. Deficiencies in certain nutrients can disrupt the hair growth cycle and potentially lead to thinning or shedding over time.

What vitamin deficiencies can cause hair loss?

Some of the most common nutritional deficiencies linked to excessive hair loss include biotin, iron, vitamin D, and vitamins B12, A, C, and zinc.

Biotin (Vitamin B7)

Biotin plays a key role in keratin production. Deficiency can result in dry, brittle hair and scaling of the scalp. Fried eggs, almonds and sweet potatoes are good biotin sources.

Iron

Iron transports oxygen to hair follicles. Low levels may cause thin, weak strands. Leafy greens, beans, lentils and lean red meat prevent fatigue and hair fragility.

Vitamin D

Vitamin D regulates cell proliferation. Deficiency has been linked to alopecia. Fatty fish, eggs and shiitake mushrooms contain vitamin D.

Vitamin B12

B12 supports nervous system function. Vegetarians and vegans are at risk if no supplements taken. Salmon, tuna and fortified foods supply B12.

Vitamin A

Antioxidant vitamin A protects follicles from damage. Liver toxicity rather than deficiency can induce shedding.

Vitamin C

Vitamin C aids collagen production for strong hair. Bell peppers, kiwi and broccoli are vitamin C sources.

Zinc

Zinc supports scalp health and sebum production. Pumpkin seeds boost absorption versus supplements alone.

Addressing Deficiencies

Blood tests determine shortfalls. Focus on nutrient-dense whole foods before supplements. Regrowth may take 6+ months with optimized diet.

A balanced diet featuring antioxidant-rich fruits and vegetables, lean proteins and healthy fats supplies hair with the vitamins and minerals needed for growth and strength.

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