Fermented plum for methane constipation

Since I struggle with severe methane SIBO constipation and have to rely on stimulant laxatives (because osmotic ones don’t work for me) my naturopath suggested trying Share Original fermented plum. Have you guys ever heard of it or maybe tried it? The reviews are very promising and I’m willing to try it, but Idk if it’s okay to take it if it’s a fermented thing and I have IMO. Naturopath said it’s fine and this thing will definitely clean me out and that’s what I want lol. I’m really tired of using laxatives and other pharmaceuticals to get things going and want to find more natural solution. I ordered a lil pack of these plums though. He said I should take 1/2 of a plum before bed with two cups of warm water.