by on 
The videos are solely for informational purposes. NOT intended to replace professional medical diagnosis, advice, or treatment. Always seek the advice of a physician or other qualified health provider with any medical questions. Never disregard professional medical advice or delay seeking it because of a YouTube video.
Hair loss causes
Genetics
Cancers
Thyroid conditions
Medications
Stressful
Vitamin A overdose
Protein deficiency
Iron deficiency
rapid weight loss
Over-styled hair
Age
Hair disease
High levels of androgens (man)
Pregnancy hormone changes(woman)
Menopause hormone changes(women)