symptoms of too much vitamin b12 injection High Levels: Causes, & What to Do Vitamin B12 Side Effects

Last reviewed: May 30, 2026 Last updated: May 30, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations

While most symptoms resolve with supplementation, some developmental and cognitive problems may persist

Recent Clinical Trials and Research Findings Recent studies suggest high-dose B12 can help with nerve pain

TrustScore 3.50 Make supplements work for you Get the app to see TrustScore details Nutrients Suggested use: Take 1 softgel daily

Specifically, it represents the C-terminal fragment of HGH (residues 176-191), the precise portion of the molecule that handles fat metabolism, with an added disulfide bridge for stability