Eating high levels of some soy products - including tofu - may raise the risk of memory loss, research suggests.

The study focused on 719 elderly Indonesians living in urban and rural regions of Java.

The researchers found high tofu consumption - at least once a day - was associated with worse memory, particularly among the over-68s...

A third theory is that damage is caused not by the tofu, but by formaldehyde, which is sometimes used in Indonesia as a preservative.