Higher antioxidant levels linked to lower dementia risk
The study involved 7,283 people who were at least 45 years old at the beginning of the study. They had a physical exam, interview and blood tests for antioxidant levels at the beginning of the study. They were then followed for an average of 16 years to see who developed dementia.

The participants were divided into three groups based on their levels of antioxidants in the blood. People with the highest amounts of lutein and zeaxanthin were less likely to develop dementia than those with lower levels. Every standard deviation increase in lutein and zeaxanthin levels, approximately 15.4 micromols/liter, was associated with a 7% decrease in risk of dementia. For beta-cryptoxanthin, every standard deviation increase in levels, approximately 8.6 micromols/liter, was associated with a 14% reduced risk of dementia.

Source: https://medicalxpress.com/news/2022-05-higher-antioxidant-linked-dementia.html
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