Visualization of cortical, subcortical and deep brain neural circuit dynamics during naturalistic mammalian behavior with head mounted microscopes and chronically implanted lenses Nature Protocols Evidence Based Supplements for Practitioners Ortho Molecular BPC 157. What are your thoughts?, I think they are promising but Im not sold just yet for me personally because of the lack of data and regulation. But I do know a lot of people that swear by them. Tissue specific landscape of protein aggregation and quality control in an aging vertebrate: Developmental Cell