There are many foods for hair growth:

For vegetarian people

Spinach   its including Iron, vitamins A & C for strong hair.

Sweet potatoes   Beta-carotene supports scalp health.

Avocados   Vitamin E and healthy fats nourish hair.

Almonds   Biotin and vitamin E strengthen hair.

Walnuts   Omega-3 and zinc promote hair growth.

Pumpkin seeds   Zinc and magnesium support follicle health.

Lentils   Protein, iron, and biotin improve hair structure.

Chia seeds   Omega-3 fatty acids for shiny, strong hair.

Carrots   Beta-carotene keeps scalp healthy and hair strong.

Paneer   Protein and calcium for hair structure

For Nonvegetarian people

You can eat all foods by given upper answer

Eggs   Rich in protein and biotin for thick hair.

Salmon   Omega-3 fatty acids nourish hair follicles.

Chicken   Protein for hair growth and strength.

Oysters   High in zinc, helps prevent hair loss.

Tuna   Omega-3 fatty acids improve scalp circulation.

Eating healthy foods with protein, vitamins, and minerals helps your hair grow strong
and shiny.

Full story:
https://www.quora.com/What-food-is-good-for-hair-growth

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