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B12 Deficiency Symptoms: What's the Connection

There are many other potential causes of histamine intolerance including: Environmental causes such as pollen and dust mites Excessive alcohol intake A diet too high in fermented foods, too much protein, and consuming aged foods Hormonal excess, particularly estrogen Adrenal dysfunction Lack of sleep Stress & anxiety Nutrient deficiencies Gut infections & more Symptoms of Histamine Intolerance Some of the most common symptoms of histamine intolerance are as follows: Headaches Diarrhea Eczema or hives Irregular heartbeat Low blood pressure Wheezing Runny nose Heartburn Premenstrual syndrome Seasonal allergies Food allergies Asthma Motion sickness Nausea Vomiting Irritability Loose stool Chest tightness Histamine intolerance commonly goes undiagnosed because many of the symptoms mimic an allergic reaction

Warning signs include persistent fatigue despite adequate sleep, cold intolerance (especially cold hands and feet), menstrual irregularity or cessation in female subjects, hair thinning or shedding, and mood disturbances (irritability, low motivation)

Adachi S, Kawamoto T, Otsuka M et al (2000) Enteral vitamin B 12 supplements reverse postgastrectomy B 12 deficiency Bensky MJ, Ayalon-Dangur I, Ayalon-Dangur R et al (2019) comparison of sublingual vs