The paper presents a new microscopic mechanism for the magneto-electric (ME) effect in non-collinear magnets, based on the spin supercurrent. The authors draw an analogy between superconductors and magnets, where the spin supercurrent is analogous to the charge current in superconductors. They derive the distribution of the spin supercurrent and the resulting electric polarization, emphasizing the role of symmetry considerations, particularly time-reversal and spatial inversion symmetries. The ME effect is discussed in the context of spiral spin structures, where the spin supercurrent induced between non-parallel spins leads to electric polarization. The authors also explore the vector potential coupled to the spin supercurrent, similar to the Aharonov-Casher effect and Dzyaloshinskii-Moriya interaction. They provide a detailed theoretical framework and calculate the expected polarization for both double-exchange and superexchange interactions in a cluster model. The paper concludes with applications to realistic spiral magnets, showing how external electric fields can induce uniform magnetization and polarization.The paper presents a new microscopic mechanism for the magneto-electric (ME) effect in non-collinear magnets, based on the spin supercurrent. The authors draw an analogy between superconductors and magnets, where the spin supercurrent is analogous to the charge current in superconductors. They derive the distribution of the spin supercurrent and the resulting electric polarization, emphasizing the role of symmetry considerations, particularly time-reversal and spatial inversion symmetries. The ME effect is discussed in the context of spiral spin structures, where the spin supercurrent induced between non-parallel spins leads to electric polarization. The authors also explore the vector potential coupled to the spin supercurrent, similar to the Aharonov-Casher effect and Dzyaloshinskii-Moriya interaction. They provide a detailed theoretical framework and calculate the expected polarization for both double-exchange and superexchange interactions in a cluster model. The paper concludes with applications to realistic spiral magnets, showing how external electric fields can induce uniform magnetization and polarization.