The hair cycle normally consists of growing, resting and falling hairs and there is a delicate balance between these stages of hair cycle. Normally hair should re-grow but if it is not happening, you should consider seeing a dermatologist.
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Each supplement deserves reasoning to be taken, omega 3 serves some specific purposes. It is a good idea to rotate supplements every 2 months if you are not sure so that you derive benefits from all.
Your dermatologist will decide a treatment plan for you after a consultation.