This is largely because peptides are too big to be properly absorbed through the intestine walls after oral ingestion
Final Thoughts Peptides arent magic, but they are smart medicine
Oral NAD+ Supplements: Because NAD+ itself isnt easily absorbed if taken as a pill, oral NAD+ therapy usually means taking NAD precursors such as nicotinamide riboside (NR) or nicotinamide mononucleotide (NMN)
B12s role in red blood cell production is critical here
Mucositis, Periodontitis & Gut-Oral Axis KPV is particularly relevant for patients with refractory periodontitis, pericoronitis, chemotherapy-induced oral mucositis, or chronic low-grade gingival inflammation unresponsive to conventional scaling
"Injections are the preferred treatment for patients unable to absorb vitamin B12, such as patients with autoimmune-related anemia or pernicious anemia, or history of gastrectomy, which means partial removal of the stomach, or a history of bariatric surgery," Levine told InStyle