Yes, absolutely â headaches are a very well-recognized symptom of all three deficiencies your wife has. Low Magnesium in particular is one of the most studied causes of headaches and migraines â magnesium deficiency causes blood vessels to constrict and affects brain neurotransmitters, both of which trigger head pain. Magnesium supplementation is even used medically as a preventive treatment for migraines. Low iron (
ferritin) causes reduced oxygen supply to the brain, which directly causes headaches even before full anemia develops. And low
Vitamin B12 affects the nervous system and can cause persistent dull headaches or migraine-like symptoms. So the headaches your wife is experiencing are very likely a direct result of these three borderline deficiencies together.
Next Steps
Get her started on appropriate supplementation as prescribed by her doctor â correcting these deficiencies should also help the headaches. Please consult me directly on Practo for a detailed evaluation.