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2. Cysteine:

Cysteine is an essential amino acid which must be derived from external sources. It is responsible for building the surface of your hair and improving its elasticity. This amino acid plays a key role in supplying Sulphur to your hair cells, which is a major component of Keratin. To achieve longer, stronger hair, you must amp your Cysteine levels by consuming foods like Broccoli, Chicken, milk, yoghurt etc.,

3. Methionine:

Methionine is a natural antioxidant which can fight free radicals that lead to oxidative stress of your hair cells. It helps in building the surface of your hair by supporting the formation of Collagen. Methionine can also allow for a better blood supply to your follicles. Some important sources of this amino acid are fish, eggs, cereals, sesame seeds etc.,

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4. Lysine:

To achieve healthy, bouncy hair, collagen is absolutely necessary. This is a type of protein which makes your hair elastic and strong. Lysine is very important to produce Collagen to give the right shape and volume to your strands. A deficiency of this amino acid can lead to weak hair and ultimately, hair loss. In such cases, it is advisable to go for external supplements for hair loss, along with including foods like meat, lentils, nuts, spirulina etc.,

5. Arginine:

Arginine is a semi-essential amino acid, which means that it is naturally produced by the body and in some conditions, external supplements may be required. Arginine can promote better blood circulation to the hair strands, for the scalp to better absorb all the vital nutrients. Studies also revealed that this amino acid could protect your hair from damage due to chemical treatments and bleaching. The natural sources of this agent are red meat, nuts and dairy products.