Does reverse osmosis really help to purify water?

Yes, reverse osmosis works to purify water. The reverse osmosis process uses a semi-permeable membrane to filter any unwanted compounds and large particles like sediment, contaminants, chlorine, dirt, and salt. Reverse osmosis removes viruses, nitrates, fluoride, arsenic, sulfates, and bacteria. However, this process also removes the healthy minerals from the water like sodium, potassium, calcium, and magnesium.