The 2025 Brunel study is valuable because it used rigorous methodology and represented true independent replication
Think of intrinsic factor as the gatekeeper for Vitamin B12 absorption
The product is prepared under regulatory oversight (state pharmacy boards inspect compounding pharmacies), but the documentation standard is not as uniform as FDA-registered manufacturing
These products are often marketed for building muscle, promoting longevity, or healing from injury
Routes reported in the literature include intravenous, subcutaneous, and intraperitoneal administration in animal models, with intravenous infusion common in the early human studies
You have nausea, vomiting, or diarrhea