When side effects do occur, they are typically very mild and temporary
High FODMAPs foods are high in fermentable carbohydrates that feed intestinal bacteria
US 8598118, Harding JW, Wright JW, Benoist CC, Kawas LH, Wayman GA, "Hepatocyte growth factor mimics as therapeutic agents", issued 3 December 2013 "Facilitation of hippocampal synaptogenesis and spatial memory by C-terminal truncated Nle1-angiotensin IV analogs"
Symptoms of vitamin B12 deficiency may include any or all of the following: Chronic fatigue (4) or low energy (despite getting enough sleep) Shortness of Breath Macrocytic anemia (5) High MCV (mean corpuscular volume on CBC analysis) Neurological changes that can mimic dementia (6) Depression (7), anxiety, and other mood disorders Difficulty with concentration (8) Brain fog Skin changes like hyperpigmentation (9), vitiligo, or angular stomatitis Hair changes (including hair loss (10)) Perhaps you can relate to one or more of these symptoms noted above