bpc 157 barrett's esophagus bpc 157 barrett's esophagus Yes,

10.1016/j.febslet.2009.03.038 101 OkamotoH.IshikawaA.YoshitakeY.KodamaN.NishimutaM.FukuwatariT.et al (2003)

Pre-existing health conditions: Individuals with certain pre-existing health conditions, such as kidney or liver disease, should consult their healthcare provider before starting NAD+ supplementation to ensure it is safe and appropriate for their specific situation

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Likewise, a nerve block may be contraindicated in a patient in whom compartment syndrome is a concern, since the analgesic effect will inhibit the patients ability to sense increasing pain or worsening paresthesias