Water,protein,legumes,castor oil,coconut oil (oils for hot oil scalp treatment) and hair steaming. Protective style can help retain length. As far as supplements ive heard biotin helps but its no miracle pill. All of these things promote growth.
If you are doing all the rite things be patient, and length will come. I use to hate these words as a new natural but its true. Most of the women you see with long hair have been natural over 4 years. HTH
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