I ordered the bulk supplement EDTA off of Amazon last week, I received it today took about an 1/8-1/4 of a teaspoon and went about my day. In a short few hours as I was driving I noticed my eyesight was very clear to the point of seeing the small letter on the car license plate in front of me with no glasses. Which I should wear but I hate wearing glasses. It's 10:40 p.m at night and my vision is still clear. Another noticable problem was I always had a slight headache that felt like head congestion and that too was gone. I'm very pleased with all of bulk supplement products that I order off of Amazon. Thank you Bulk Supplement for your superior products and great costumer care. I just gave my husband some as well.