Hydroxocobalamin is naturally produced by bacteria in the digestive tract following the breakdown of food, and can also be produced in a laboratory when extracted from microorganisms
Given that the global IBS prevalence is approximately 4% under Rome IV criteria, the post-COVID increase represents a substantial disease burden

decreased TSH, decreased Total T4, and decreased Free T4) Uncommon (0.1% to 1%): Galactorrhea, hypoadrenalism, diabetes insipidus [Ref] Local Very common (10% or more): Injection site pain (13.8%), injection site reactions Common (1% to 10%): Injection site hematoma [Ref] Dermatologic Very common (10% or more): Alopecia (13.2%) Common (1% to 10%): Pruritus, bruise, rash Uncommon (0.1% to 1%): Cellulitis, petechiae, urticaria, basal cell carcinoma [Ref] Musculoskeletal Common (1% to 10%): Joint pain, backache Uncommon (0.1% to 1%): Arthritis, joint effusion, muscle pain, Raynaud's phenomenon [Ref] Psychiatric Common (1% to 10%): Depression Uncommon (0.1% to 1%): Anxiety, paranoia, libido decrease [Ref] Other Very common (10% or more): Fatigue (31.8%), generalized pain (15%) Common (1% to 10%): Weakness Uncommon (0.1% to 1%): Hearing loss, otitis [Ref] Respiratory Very common (10% or more): Upper respiratory tract infection (18.2%), sinusitis (12%) Common (1% to 10%): Cold symptoms, flu symptoms, epistaxis Uncommon (0.1% to 1%): Pneumonia, pulmonary nodule, status asthmaticus [Ref] Renal Uncommon (0.1% to 1%): Increased creatinine kinase [Ref] Hypersensitivity Uncommon (0.1% to 1%): Allergic reaction Frequency not reported : Anaphylactic reaction [Ref] Immunologic Very common (10% or more): Antibodies to octreotide (25%) Ocular Common (1% to 10%): Blurred vision, visual disturbance Uncommon (0.1% to 1%): Increased intraocular pressure [Ref] Genitourinary Common (1% to 10%): Urinary tract infection, pollakiuria Uncommon (0.1% to 1%): Gynecomastia, amenorrhea, polymenorrhea, oligomenorrhea, vaginitis, nephrolithiasis, hematuria [Ref] References 1

These quality controls support reproducibility, precise dosing, and consistent performance in both in vitro and in vivo protocols
26,95 Diagnosis and screening recommendations Early detection of DPN is crucial to prevent foot ulcers and amputations, among other complications
This suggests that robust NAD+ repletion helps preserve antioxidant capacity