I've seen that @Freddd talks about the need to remove glutathione precursors, but was wondering if bone broth protein qualified as a glutathione precursor? Would this result in an adverse affect on B12 stores? I'm making reasonable progress on the methylation protocol, but still have a very sensitive stomach, so the bone broth protein would be very useful. I can only tolerate 2x 650mg betaine HCL per meal, anymore and it makes the constipation worse and drives methylation down the wrong pathway. This isn't enough to improve my MMC. However, I added two malic acid capsules today, which helped except for burning irritation in my still sensitive stomach. I was hoping the bone broth protein could heal that, providing it did not affect methylation.