6 Remedies for Sleep Problems—Do They Work?
By Rachel Johnson, Ph.D, M.P.H., R.D., March/April 2008
Can anything we eat or drink help? Here’s what the science says.
1. Drink some warm milk before bedtime
Decades ago, scientists looked into this folk remedy and posited that tryptophan, an amino acid in milk (and turkey), might be responsible for its supposed sleep-inducing effects. Earlier research had shown that when tryptophan is released into the brain, it produces serotonin—a serenity-boosting neurotransmitter. But when milk (and other tryptophan-rich foods) were tested, they failed to affect sleep patterns. “Tryptophan-containing foods don’t produce the hypnotic effects pure tryptophan does, because other amino acids in those foods compete to get into the brain,” explains Art Spielman, M.D., an insomnia expert and professor of psychology at the City University of New York. Warm milk at bedtime may be comforting, but it won’t boost sleep-promoting serotonin.
2. Have a bedtime snack
A light bedtime snack can stave off hunger, a known sleep robber. But eating high-glycemic-index (GI) carbohydrates—hours earlier at dinner—might also help. (High-GI foods cause a greater rise in blood sugar and insulin than do lower-GI foods.) A recent paper in the American Journal of Clinical Nutrition found that when healthy sleepers ate carbohydrate-rich suppers of veggies and tomato sauce over rice, they fell asleep significantly faster at bedtime if the meal included high-GI jasmine rice rather than lower-GI long-grain rice. While the authors aren’t sure how it happened, they speculated that the greater amounts of insulin triggered by the high-GI meals increased the ratio of tryptophan relative to other amino acids in the blood, allowing proportionately more to get into the brain. Save high-GI carbs for dinnertime, when their side effect—drowsiness—is a plus.
3. Drink herbal tea
Chamomile, lemon balm, hops and passionflower are all touted for their sleep-promoting properties. You’ll often find them in “sleep-formula” tea blends, but unfortunately their effectiveness hasn’t been proven in clinical studies, according to the American Academy of Sleep Medicine. “I don’t doubt these teas work for some. A warm liquid before bed may produce sleepiness by generating body heat,” speculates Spielman. Beware: drinking liquids close to bedtime can mean nocturnal trips to the bathroom. A cup of “sleep-time” tea might be worth a try…if you have a strong bladder.
4. Take a ‘sleep supplement’
Shelves in supplement stores are stacked with sleep formulas. According to one NIH survey conducted in 2002, 1.6 million people tried complementary or alternative therapies like these, and over half of them reported their insomnia improved “a great deal.” However, those glowing anecdotes haven’t been backed up by rigorous scientific study; evaluations of most nutritional supplements haven’t shown any effects whatsoever. The one exception is valerian root, which seemed to help improve sleep with rare, and mild, side effects, such as stomach upset. But finding an effective formulation of valerian root is tricky, since the FDA doesn’t regulate herbal supplements. Don’t waste your money on sleep supplements; hold off on using valerian until standardized formulations become available.
5. Have a nightcap.
Though a glass of wine may help you fall asleep, excessive alcohol use can make you wake up in the night. One theory is that alcohol suppresses the REM (rapid eye movement) sleep state that’s critical to a good night’s sleep, says Spielman. “One of my insomnia patients became remarkably better when he reduced his alcohol intake from 20 to three drinks per week.” Drink moderately, if at all; avoid drinking within a few hours of bedtime.
6. Cut out all caffeine.
Caffeine affects everyone differently, so if you’re sensitive it might be worth trying to cut down—or limit caffeine to the morning only. This can mean more than just cutting out a cup of coffee. The major sources of caffeine in Americans’ diets are coffee (71 percent), soft drinks (16 percent) and teas (12 percent) but chocolate is also a source. “Our ability to excrete caffeine decreases with age,” says Spielman, so while you might have tolerated four cups of coffee a day when you were 20, you’ll probably need to cut down as you get older. Cut down on caffeine or limit it to the morning; if insomnia persists, consider going cold turkey.
I’m going to try all of the above advice in my quest for shuteye. I know enough about the placebo effect to be content with just believing it will work. As for my husband he’ll be content—no, grateful—if my nighttime shopping tapers off.
Rachel Johnson, EatingWell’s senior nutrition advisor, is dean of the University of Vermont College of Agriculture & Life Sciences.
MY THOUGHTS
Milk never worked for me. The Sleepytime Tea worked for awhile. What really worked for me is waking up early, getting early morning sun and lots of exercise. I've never slept better.
