Changing your diet may help brighten your outlook.
Until recently,
we've been told to shun fat and cholesterol to save our hearts because
eating too much, experts said, would put us at greater risk for heart
attack, stroke, and early death. But instead of improving our health,
could the "fat is bad" dogma of the '90s and early 2000s be partially to
blame for the uptick in depression and suicide among Americans?
That might be a bit of a leap, but a compelling new meta-analysis in the Journal of Psychiatry & Neuroscience makes
you wonder. It found that low levels of blood cholesterol, potentially
caused by inadequate fat in the diet, were associated with a greater
risk of being deeply depressed or suicidal. In fact, people with the
lowest cholesterol levels had a whopping 112% higher risk of suicidal
thoughts.
But why? One theory is because the brain is 60 percent fat and
about 25 percent your body's cholesterol is found there, the brain
can't function optimally without sufficient levels of those nutrients. In
fact, some individual studies show that very low
cholesterol impairs your ability to effectively synthesize and transport
neurotransmitters like mood-boosting serotonin.
Sorry, this isn't a pass to start inhaling burgers, fries, and sticks of
butter in the name of happiness. Instead, focusing on the right fats in
reasonable quantities could offer the mental-health benefit. "Fat
should account for about 25 to 35 percent of your total daily
calories—55 to 78 grams on a 2,000-calorie-a-day diet," says Frances
Largeman-Roth, RDN, a nutritionist and author of Eating in Color, who is not affiliated with the study. Snack and lose weight with this box of Prevention-approved treats from Bestowed.
Which fats are best? "Omega-3s
are highly concentrated in the brain and associated with increased
levels of 'good' HDL cholesterol," says Largeman-Roth. "Plus, omega-3
deficiency in adults has actually been linked to mood swings and
depression." Good sources include fatty fish like albacore tuna, salmon,
herring, sardines, and cod; grass-fed meats and dairy; pasture-raised
eggs; and chia, flax, and hemp seeds. Try flaxseed oil in a smoothie.
Foods rich in monounsaturated fats such as avocados, almonds, and olive oil hold promise, too as they've been linked to increased levels of HDL as well as improved cognitive function. Saturated fats and trans fats, on the other hand, have been associated with an increased risk of depression.
But eating more high-quality fats isn't the key to happiness for everyone, experts say. Very low cholesterol, as well as depression, could
also be due to any number of factors, such as an underlying illness,
another nutrient deficiency, certain medications, or a genetic
resistance to dietary cholesterol. So your individual case of the blues
may not necessarily be cured with diet changes alone.
The bottom line is that if you're feeling depressed, definitely don't shun healthy sources of fat, but also be sure to work with your doctor to see if there may be underlying issues at play.
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