An ingestible capsule arranged, in use, to cross a human stomach for carrying out a phototherapic treatment arranged to combat an infection due to the presence of the bacterium Helicobacter pylori, said ingestible capsule comprising at least one primary light source arranged to emit an electromagnetic phototherapic wave having a wavelength λ1, at least one auxiliary light source arranged to emit an electromagnetic phototherapic wave having a wavelength λ2, a wrapper arranged to contain said or each primary light source and said or each auxiliary light source, said wrapper being at least partially transparent to said wavelengths λ1 and λ2, a control unit arranged to selectively activate said or each primary light source and/or said or each auxiliary light source, and at least one energy source arranged to provide energy for feeding said control unit and/or said light sources. In particular, 400 nm<；λ1<；525 nm and 525 nm<；λ2<；650 nm. Furthermore, said control unit is configured to receive an information of position reporting in real time an area of said stomach crossed by said ingestible capsule； to determine, known said information of position, a wavelength, a dosage and a duration of administration of said electromagnetic phototherapic waves for an optimal phototherapic treatment of said area of said stomach； to selectively activate said or each primary light source and/or said or each auxiliary light source to provide said optimal phototherapic treatment of said area of said stomach.
