My age is 23 .i m facing to much hair fall.and receding hairline also start i think.head scalp is easily visible.hairs are thinning day by day . i m consuming vitamin d now days .can vitamin d causes hairfall.how to stop hairfall?

It would be rather unusual for vitamin D to cause any hair loss, but would check serum levels to "clear the air". Ideally you should be close to 50-70 ng/ml, and best not to be higher. A dermatologist should be consulted, regarding your scalp issues.

There are other causes of hair fall . Please check with a Dermatologist for treatment options.