𝑆 𝑇 0 conversion is considerably more efficient than -𝑆 𝑇 ± conversion, one should expect that should increase 𝛿𝑃 significantly, as should the resulting enhancement. Please do not adjust margins Please do not adjust margins a selective 90 proton pulse (a) and on-resonant CW N pulse (b). SLIC-SABRE scheme (with an additional hard 90 proton pulse before polarization transfer) with off-resonant CW N pulse followed by a selective 90 N pulse (c) and an on-resonant CW To exploit this effect, we have run two more experiments (with on-and off-resonance excitation) using an additional 90 proton pulse prior to the polarization transfer sequence. As one can see from Figure , the resulting enhancement dramatically increases for both transfer schemes, here approximately by a factor of 7. This is a clear indication that fast and efficient -𝑆 𝑇 0 conversion in H 2 is indeed taking place in the studied sample. Comparison of the pulse sequences also shows that applying a 90 proton pulse is indeed an efficient way to re-establish the desired -population difference.