Although some studies reveal that flaxseed does not significantly reduce hot flashes, one study in 2007 reported that menopausal women decreased the frequency and intensity of their hot flashes after consuming 2 tablespoons of ground flaxseed twice daily, according to WebMD. Study participants noticed results after one week.
Researchers believe that lignans, which are compounds similar to estrogen, found in flaxseed are responsible for decreasing hot flashes, explains EatingWell. Because flaxseed is high in fiber, individuals should gradually introduce them into the diet, to avoid bloating. Flaxseed is best consumed when ground and sprinkled on top of yogurt, cereal, juice or salad.