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But it's not FDA-approved and there isn't an official prescription drug for it

The finding that 5 of 11 vitamin B 12 deficiency patients without a history of gastrectomy complained of tongue pain in the absence of any significant pathologic oral signs suggests that blood examinations, including vitamin B 12 measurements, are mandatory for patients with glossodynia

Monique Sensenbrenner at a French lab and Gertrude Lindler at a German lab both demonstrated this effect in cell cultures, providing cross-laboratory validation of the nerve growth-promoting properties

Response differences are based on baseline metabolic characteristics, diet, and comorbid disease