You wouldnt start weightlifting with the heaviest dumbbell
Signs of thiamine deficiency can include: having Hashimotos or other autoimmune conditions, irritable bowel syndrome (IBS), fatigue, low blood pressure, low stomach acid , brain fog, and/or adrenal and blood sugar issues
Feeling constantly tired, low on energy, or just not quite yourself
Plant-Based Vitamin B12 At present, it is only certain that the freshwater algae chlorella contains a guaranteed vegan source of B12, provided that it has been grown naturally (not under sterile farm conditions)
But certain groups tend to get little benefit from pills and are often better served by injections