If you wake up in the middle of the night or hit an afternoon slump, your blood sugar could be the reason. Here’s the food strategy a top dietitian uses herself.
Waking up at 2 a.m. with a restless mind isn’t always about stress or classic insomnia. For many people, the real issue is unstable blood sugar. Erin Palinski-Wade, a U.S. dietitian who works with diabetes patients, has seen it firsthand—energy crashes, broken sleep, and a cycle of caffeine that only makes things worse.
Forget herbal teas and sleep supplements for a moment. Palinski-Wade points to something simpler: what you eat. When your blood sugar spikes and then drops, your brain can get jolted awake, sometimes hours after you’ve gone to bed. That’s why the afternoon slump and those frustrating night wakings often go hand in hand.
A 2025 review analyzed seven studies and found that tart cherry juice or concentrate may slightly improve sleep quality and duration, but results are inconsistent and not considered a definitive solution.
Instead of chasing sleep with melatonin gummies or white noise, Palinski-Wade recommends a steadier approach. Her rule for every meal and snack: combine lean protein, slow-digesting carbs, and healthy fats. For example, salmon with brown rice and avocado, or Greek yogurt with berries and walnuts. This mix slows digestion, keeps blood sugar steady, and helps your brain avoid the metabolic alarms that can trigger hunger, anxiety, or sudden wakefulness. According to Fox News, this balanced approach is a common thread in recent expert advice.
There’s one food that stands out in this strategy: tart cherries. Palinski-Wade suggests tart cherries—either as 100% juice (about 4–6 ounces) or a quarter cup of dried fruit—as a late-day snack. Tart cherries are naturally high in melatonin, the hormone that signals your body it’s time to sleep. They also contain compounds that may help your body use and sustain melatonin longer through the night. Still, as a 2025 review notes, the effect is modest and may not be significant for everyone, especially if you’re watching your blood sugar.
Beyond the cherry hype
The science isn’t a magic fix. A 2025 review found that tart cherries can modestly improve sleep, but the effects are inconsistent and often subtle—especially for people with diabetes or those on certain medications. Palinski-Wade is clear: tart cherries are a tool, not a cure-all. The real benefit comes from your overall eating pattern, not a single “superfood.”
Nighttime awakenings at 2–3 a.m. can also be caused by factors such as stress, caffeine, alcohol, hormonal changes, or even nocturnal hypoglycemia, which may present with sudden waking, night sweats, or nightmares. Addressing only diet may not resolve all cases of disrupted sleep.
If you rely on caffeine to get through groggy mornings, Palinski-Wade has a warning. Caffeine lingers in the body for hours, and drinking it less than ten hours before bed can make it harder to fall asleep. She recommends capping intake at 300 mg per day—about three cups of coffee. More than that, and you risk triggering stress hormones like cortisol and adrenaline, which can disrupt sleep and drive fat storage and inflammation.
It’s an easy cycle to fall into: poor sleep leads to more caffeine, which leads to even worse sleep. As recent science coverage points out, even popular sleep rituals like lavender can only do so much if you don’t address the underlying metabolic triggers.
What actually works
Palinski-Wade’s advice is practical. She doesn’t promise instant results or a universal fix. Instead, she urges people to pay attention to how they build meals: focus on whole grains, legumes, lean proteins, and healthy fats at every meal. Keep caffeine to the morning. And if you want to try tart cherries, do it as part of a balanced routine—especially if you’re managing blood sugar or taking medication.
What’s missing from most sleep advice is this: your body’s metabolic rhythms matter as much as any bedtime ritual. When you keep blood sugar steady, you’re not just fighting fatigue—you’re giving your brain the steady fuel it needs to stay asleep and wake up refreshed. The evidence isn’t flashy, but it’s consistent: small, sustainable changes in eating habits can have a bigger impact on sleep than any quick-fix supplement.
Many people are stuck in a loop of restless nights and caffeine-fueled days, chasing solutions that never address the root cause. The real fix isn’t in a bottle or a trendy diet, but in the daily habit of building meals that work with your body’s natural rhythms. That’s the strategy Palinski-Wade uses herself—and it’s the one that holds up when the sleep industry’s promises fall short.
Melatonin is a hormone made by the pineal gland that helps regulate sleep. While supplements are common, foods like tart cherries offer a gentler way to support natural melatonin levels. But the impact of food-based melatonin varies from person to person, and it works best as part of a bigger approach to sleep health that includes steady routines, limited caffeine, and attention to blood sugar.
