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Galangal root has been used in Ayurvedic and traditional Chinese medicine for centuries and is likely safe when consumed in the amounts typically found in foods.
That said, there’s limited information regarding a safe dosage or the potential side effects of consuming it in larger amounts, such as those found in supplements.
One animal study observed that doses of 909 mg per pound (2,000 mg per kg) of body weight resulted in serious side effects, including a drop in energy levels, lack of appetite, excessive urination, diarrhea, coma, and even death.
These side effects were absent at significantly smaller dosages of 136 mg per pound (300 mg per kg) of body weight.
Nonetheless, information about the safety and potential side effects of galangal root supplements in humans is lacking. *
