Long thought a dietary supplement exclusively benefiting older women by maintaining memory, Soya Isoflavones have actually been shown to positively impact a multitude of cognitive functions in both men and women of all ages. In a study published by ‘Psychopharmacology’, students were given a high soya diet of 100mg isoflavones/day vs. a control group maintaining a low soya diet (>0.5mg / day) over a 10 week period. In a series of cognitive tests following the 10 week period, both the men and women receiving the high soya diet exhibited significant improvements in short-term and long-term memory (in both verbal and non-verbal tests) as well as in mental flexibility. In addition to the mental performance benefits shown by those with high soya diets, these students also experienced a reduced level of tension and anxiety during testing.
So not only can a diet high in soya isoflavones improve mental performance, but it also reduces tension and anxiety – talk about a wonder-food!
The best sources of soya isoflavones are almost exclusively from soy based products, including:
Miso: 59mg (per ½ cup)
Boiled Soybeans: 47mg (per ½ cup)
Dried Soy Nuts: 37mg (per 1 oz.)
Tempeh: 37mg (per 3 oz.)
Soy Milk: 30mg (per 1 cup)
Tofu: 20mg (per 3 oz.)