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Therefore, a one-size-fits-all approach is rarely effective

Common signs and symptoms to be aware of include: Fatigue and weakness often associated with iron-deficiency anaemia or vitamin B12 deficiency, both of which impair red blood cell production and oxygen transport

For more on mood-related support, see: Nootropics for neurotransmitters and anti-anxiety nootropic stack

GIP (Glucose-dependent Insulinotropic Polypeptide) GIP is another natural hormone that is released in your gut after eating, in response to fats and carbohydrates

In some cases, additional tests such as a bone marrow biopsy or an endoscopy may be necessary to determine the underlying cause of the deficiency