Welcome to the third edition of Hourglass, the monthly virtual gathering of bloggers to discuss the Biology of Aging.

For today’s edition, let’s imagine all participants sitting around a table leading a lively Questions & Answers session, discussing as a group, listening, talking. (And, well, aging.)

Q: What is aging?
Ms. Wikipedia: “Ageing or aging (American English) is the accumulation of changes in an organism or object over time. Ageing in humans refers to a multidimensional process of physical, psychological, and social change. Some dimensions of ageing grow and expand over time, while others decline. Reaction time, for example, may slow with age, while knowledge of world events and wisdom may expand.”

Aging may not be the sexiest  of words in our vocabulary. Unless, of course (as I heard somewhere recently but can’t properly credit), you consider the most common alternative.

Q: If the objective of anti-aging research is to extend lifespan, isn’t there a risk that we may neglect quality of life. After all, would people really like to spend more years afflicted by the diseases and the decline that often come with age?
Ed (dragged to the discussion by Chris and Alvaro): I have relatively good news to share. A recent  University of Southern Denmark found that the proportion of elderly Danes who manage to remain independent holds steady at Read the rest of this entry »

In other words, may some foods be specifically good for brain function?

For a great in-depth review of the effects of food on the brain you can check out Fernando Gomez-Pinilla’s recent article in Nature Reviews Neuroscience (reference below). Here is an overview of the state off the research.

Several components of diet seem to have a positive effect on brain function.

Omega-3 fatty acids

These acids are normal constituents of cell membranes and are essential for normal brain function. Omega-3 fatty acids can be found in fish (salmon), kiwi, and walnuts. Docosahexaenoic acid, or DHA, is the most abundant omega-3 fatty acid in cell membranes in the brain. The human body produces DHA but not enough. So we are dependent on the DHA that we get from what we eat.

A randomized double-blind controlled trial (which means seriously conducted scientific study) is currently looking at the effect of taking omega-3 fatty acids on children’s performance at school in England. Preliminary results (Portwood, 2006) suggest that Read the rest of this entry »