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# Eating too much soy may cause memory loss
- URL: https://www.foodconsumer.org/eating_too_much_soy_may_cause_memory_loss/
- Published: 2008-07-11T16:42:00.000Z
- Updated: 2026-09-15T12:19:14.000Z
- Description: A study of 719 elderly Indonesians found eating tofu at least once a day was linked to worse memory, especially after age 68, while fermented tofu was linked to better memory. Researchers suspect phytoestrogens, though formaldehyde used to preserve tofu may play a part.
- Author: Food Consumer
- Tags: Other Diseases, Avoiding Illness, Soy, Memory Loss, #vivvo-import

FRIDAY JULY 11, 2008 (foodconsumer.org) -- A new study says that eating too much of some soy products including tofu may raise the risk of memory loss, a typical symptom of dementia.The study of 719 elderly Indonesians living in urban and rural areas of Java showed that high tofu consumption --at least once a day -- was linked with worsened memory, particularly significantly in those aged over 68.The study was conducted by researchers at the Loughborough University and results were published in the journal Dementias and Geriatric Cognitive Disorders.The researchers suspected that phytoestrogen may play a role in the worsening of memory. Early studies showed that estrogen therapy doubled the risk of dementia in those over 65.However, other factors can't be excluded. In Indonesia, formaldehyde, a highly reactive cancer-causing agent that is sometimes used to preserve foods like tofu, may be partially responsible for the increased risk of memory loss.The study also found that fermented tofu was linked to improved memory.Tofu is a popular food used as a major protein source in Asian countries and regarded as a healthy food. Low prevalence of breast cancer in Asia may be attributed to soy products.

By Ben Wasserman, and edited by Heather Kelley.  
Jul 11, 2008 - 7:58:28 AM