The present invention relates to a dietary supplement dosing device that can be connected to a source of water to enable dosing of dietary supplement to water at the time of dispensing. The dietary supplement dosing device is capable of dosing controlled amounts of the dietary supplement to water upon being dispensed for consumption by fitting it to a faucet and the dietary supplement dosed water is free of color, taste and odor and with beneficial amounts of dietary supplement. A dietary supplement dosing device comprises a flow distribution unit and a dietary supplement cartridge and the dietary supplement cartridge can be designed to deliver the dietary supplement from a source which is either in the solid or liquid form.