Memory-Mood Boosted by Curcumin

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UCLA 
The paper’s authors, in addition to Small, are Prabha Siddarth, Dr. Zhaoping Li, Karen Miller, Linda Ercoli, Natacha Emerson, Jacqueline Martinez, Koon-Pong Wong, Jie Liu, Dr. David Merrill, Dr. Stephen Chen, Susanne Henning, Nagichettiar Satyamurthy, Sung-Cheng Huang, Dr. David Heber and Jorge Barrio, all of UCLA.

Turmeric spice contains curcumin. In a new UCLA study, curcumin significantly improved memory and mildly improved mood in people with memory problems. 

Found in turmeric, curcumin has previously been shown to have anti-inflammatory and antioxidant properties in lab studies. It also has been suggested as a possible reason that senior citizens in India, where curcumin is a dietary staple, have a lower prevalence of Alzheimer’s disease and better cognitive performance.

“Exactly how curcumin exerts its effects is not certain, but it may be due to its ability to reduce brain inflammation, which has been linked to both Alzheimer’s disease and major depression,” said Dr. Gary Small, director of geriatric psychiatry at UCLA’s Longevity Center and of the geriatric psychiatry division at the Semel Institute for Neuroscience and Human Behavior at UCLA, and the study’s first author.
90 Milligrams of CurcuminThe double-blind, placebo-controlled study involved 40 adults between the ages of 50 and 90 years who had mild memory complaints. Participants were randomly assigned to receive either a placebo or 90 milligrams of curcumin twice daily for 18 months.
  
All 40 subjects received standardized cognitive assessments at the start of the study and at six-month intervals, and monitoring of curcumin levels in their blood at the start of the study and after 18 months. Thirty of the volunteers underwent positron emission tomography, or PET scans, to determine the levels of amyloid and tau in their brains at the start of the study and after 18 months.
Significant Improvements in Memory & AttentionThe people who took curcumin experienced significant improvements in their memory and attention abilities, while the subjects who received placebo did not, Small said. In memory tests, the people taking curcumin improved by 28 percent over the 18 months. Those taking curcumin also had mild improvements in mood, and their brain PET scans showed significantly less amyloid and tau signals in the amygdala and hypothalamus than those who took placebos.

The amygdala and hypothalamus are regions of the brain that control several memory and emotional functions.

Four people taking curcumin, and two taking placebos, experienced mild side effects such as abdominal pain and nausea.
Relatively Safe Form of CurcuminThe researchers plan to conduct a follow-up study with a larger number of people. That study will include some people with mild depression so the scientists can explore whether curcumin also has antidepressant effects. The larger sample also would allow them to analyze whether curcumin’s memory-enhancing effects vary according to people’s genetic risk for Alzheimer’s, their age or the extent of their cognitive problems.

“These results suggest that taking this relatively safe form of curcumin could provide meaningful cognitive benefits over the years,” said Small, UCLA’s Parlow–Solomon Professor on Aging.

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