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These are all marketing schemes. If it could stop hair fall then all the Chain of clinics and doctor's would have started selling apple cider vinegar. Be smart and take proper treatment.

Apple cider vinegar is acidic .. hard water for tap is alkaline.. hair prefare acidic pH so if you rins at end with diluted ACV in water it help to keep hair free from freez so less tangle less pull less hair loss. In your case problem is internat vitamin deficiency and thyroid (hormonal imbalance) so ACV is less effective.. though you can try it. But along with it start homoeopathic treatment to  connect your nutrient and hormonal levels

You can use it , along with that you need to take homeopathic medicines for hair growth.

You need to take Homoeopathic constitutional treatment.