10 Factors That Affect Memory

New research suggests our lifestyle choices affect memory loss almost as much as aging. Forbes looks at 10 surprising factors, positive and negative, that determine how sharp you'll stay:  

1. Tofu—eating too much can increase dementia in the elderly.

2. Carbs—likewise, too many derail Alzheimer's-fighting enzymes in the brain.

3. Hot flashes—women who suffer have trouble remembering names.

4. Smoking—hurts memory, but quitting improves it.

5. Statins—taking them to lower cholesterol also combats dementia.

6. Thyroid disorders—reduce memory-regulating hormones.

7. Depression—leads to mild cognitive impairment.

8. Chronic pain—as with work and sleep, it disrupts memory and attention.

9. Healthy marriage—in mid-life reduces your chances of dementia.

10. Fish—three or more servings per week help stave off strokes.