Most people buy tart cherry juice because they've heard it helps with sleep. The research backs this up, though with a caveat: the studies are small. A 2023 meta-analysis (a study that combines results from multiple smaller studies to get a bigger picture) looked at eight trials and found that tart cherry juice significantly improved both sleep time and sleep efficiency when measured objectively with sleep-tracking devices. People didn't always perceive the improvement themselves in self-reports, but the devices showed real changes. The effects are modest but real, and the science behind why it works is more interesting than you'd expect.

If you're looking for a natural option to help with sleep, tart cherry juice is one of the few foods with actual clinical evidence behind it.

Smart Juice Organic Tart Cherry

How tart cherry juice helps with sleep

The common explanation is that tart cherries contain melatonin. That's true, but it's not the whole story. A day's worth of tart cherry juice provides about 0.085mg of melatonin. A standard melatonin supplement provides 1-5mg. The juice gives you 6 to 60 times less melatonin than a pill. That tiny amount alone doesn't explain the sleep improvements researchers have observed.

The more interesting mechanism involves a compound called procyanidin B-2.

Your body naturally converts tryptophan (an amino acid found in foods like turkey and dairy) into serotonin (a brain chemical that regulates mood). Serotonin then converts into melatonin (the hormone that makes you sleepy). But an enzyme called IDO breaks down tryptophan before it can make that full conversion. Think of IDO as a detour that diverts tryptophan away from becoming melatonin. Inflammation increases IDO activity, which means less tryptophan available, less melatonin produced, and worse sleep.

Procyanidin B-2 in tart cherry juice blocks IDO. A 2018 study confirmed this: participants who drank tart cherry juice had lower levels of the byproduct that IDO creates when it breaks down tryptophan. That means more tryptophan was preserved and available to become melatonin. Your body makes more of its own melatonin rather than getting a small dose from the juice itself.

Tart cherry juice also contains anthocyanins, which are natural anti-inflammatory compounds (they're what give the cherries their deep red color). These reduce inflammation in the body. Since inflammation disrupts sleep through multiple pathways, this adds a third mechanism on top of the melatonin and tryptophan effects.

It's the combination of all three, not any single compound, that makes tart cherry juice work.

What the research shows

The studies are promising but small. Here's what the key trials found:

Older adults with insomnia (2018, 8 participants): 84 extra minutes of sleep per night compared to placebo. This is the headline number you see cited online. It's a real finding from a real study where participants slept in a lab with sensors tracking their actual brain activity (not just self-reported sleep diaries), but 8 people is a very small group. No other study has found an effect this large.

Healthy adults (2012, 20 participants): 34 extra minutes of sleep per night and a 5-6% improvement in sleep efficiency (the percentage of time in bed actually spent sleeping). This study also measured melatonin byproducts in urine and confirmed they increased, linking the juice directly to melatonin production.

Older adults with insomnia (2010, 15 participants): Reduced time spent awake during the night by about 17 minutes compared to a placebo (a look-alike drink with no cherry juice). Participants also reported less severe insomnia symptoms. Total sleep time trended upward but the difference versus placebo was not large enough to be statistically conclusive in a group this small.

Athletes (2022, 19 participants): Improved sleep quality after intense exercise, measured with sleep-tracking devices.

One negative study (2024, 34 participants): Found no effect using tart cherry capsules/powder in overweight adults. This raises an important point: the form may matter. Every study that found positive results used juice or concentrate, not capsules.

The 2023 meta-analysis that pooled all the study data together found clear improvements in both sleep time and sleep efficiency when measured objectively. The effects were stronger in older adults with existing sleep problems. Younger, healthy adults saw more modest improvements.

The honest assessment: the evidence is encouraging, not conclusive. The studies are small, most lasted only 1-2 weeks, and several were funded by cherry industry groups. Larger independent trials would strengthen the case. But the mechanisms are plausible, the results are consistent across multiple studies, and the risk of trying it is essentially zero.

Tart cherry vs. sweet cherry

These are different fruits. The sleep research is specifically on tart cherries, not the sweet cherries (Bing, Rainier) you eat fresh.

Tart cherries: Montmorency is the most common variety and the one used in nearly all the sleep studies. Sour, too tart to eat raw, grown primarily for juice and cooking. Higher in procyanidin B-2 and other beneficial plant compounds.

Sweet cherries: Bing, Rainier, and similar varieties. The ones you buy in the produce section and eat by the handful. They contain some melatonin and tryptophan, and a few small studies suggest they may also help with sleep, but the evidence is much thinner.

When shopping, look for "tart cherry" or "Montmorency cherry" on the label. Regular cherry juice from sweet cherries is a different product with different compounds.

How much to drink

The studies used two approaches:

Juice: Two 8-ounce servings per day. One in the morning and one 1-2 hours before bed.

Concentrate: Two 1-ounce (30mL) servings per day, same timing. Concentrate is diluted with water before drinking.

Most studies saw results after 7 to 14 days of consistent daily intake. This is not a one-glass solution. Give it at least a week or two before deciding whether it works for you.

The twice-daily dosing matters. The morning dose likely builds up the anti-inflammatory and IDO-inhibiting effects throughout the day. The evening dose provides tryptophan and melatonin closer to bedtime.

What it tastes like

Tart cherry juice is sour. Significantly more sour than regular cherry juice. Most people don't enjoy it straight.

Ways to make it easier:

• Mix concentrate into water or sparkling water

• Add honey to cut the tartness

• Blend it into a smoothie

• Mix with apple juice

• Drink it cold (tastes better chilled)

If you're using concentrate, you control the strength. Start diluted and adjust to your preference.

What Safeway carries

Look for these in the juice aisle:

Open Nature 100% Juice Tart Cherry

100% tart cherry juice is the straightforward option. Look for "Montmorency" on the label and check that it's 100% juice with no added sugar. R.W. Knudsen is a commonly available brand.

Tart cherry concentrate is more economical per serving. A small bottle lasts longer because you only use 1 ounce at a time. It's also lower in sugar and calories per serving because you're diluting it yourself.

Tart cherry juice blends mix tart cherry with apple or grape juice for a less sour taste. These are easier to drink but contain less tart cherry per serving. Check the ingredient list to see where tart cherry falls. If it's not the first ingredient, you're mostly drinking the other juice.

Avoid products labeled just "cherry juice" without specifying tart or Montmorency. These are likely made from sweet cherries.

Side effects to watch for

Tart cherry juice is a food, not a supplement, and side effects are generally mild.

GI issues: Tart cherries contain sorbitol, a natural sugar alcohol that your body doesn't fully absorb (it's the same compound that makes prune juice a laxative). Some people experience bloating, gas, or loose stools, especially at higher doses. Starting with one serving daily and working up to two can help.

Sugar and calories: One 8-ounce serving of tart cherry juice contains about 140 calories and 30-33 grams of natural sugar (varies by brand). At two servings daily, that's roughly 280 calories and 60-66 grams of sugar from the juice alone. Concentrate has fewer calories per serving than a full glass of juice, though it's still significant at 80-110 calories per ounce.

Sorbitol sensitivity: People with IBS or fructose malabsorption may be more sensitive to the sorbitol content. Start with a small amount.

Who should be careful

People with diabetes or monitoring blood sugar: The sugar content is significant at 30-33g per 8-ounce serving. Concentrate diluted in water is lower in sugar per serving. Monitor your glucose if you try it.

People watching calories: Two glasses of juice daily adds roughly 280 calories. Concentrate is the more calorie-efficient option.

Anyone on medications: The active compounds in tart cherry juice could theoretically interact with blood thinners, blood pressure medications, antidepressants, or sedatives. No serious interactions have been reported in studies, but check with your doctor if you're on medication.

What's in tart cherry juice

A 1-cup (8-ounce) serving of 100% tart cherry juice contains approximately:

• Calories: about 140 (varies by brand)

• Sugar: about 30-33g (natural, no added sugar)

• Melatonin: trace amount (far less than a supplement)

• Tryptophan: present (the amino acid your body converts into melatonin)

• Procyanidin B-2: present (blocks the enzyme that breaks down tryptophan)

• Anthocyanins: present (anti-inflammatory compounds that give the juice its red color)

• Potassium: ~400mg

• Sorbitol: present (can cause GI effects in sensitive individuals)

The melatonin content is tiny compared to supplements. The value of the juice is in the combination of compounds working together.

Juice vs. concentrate vs. capsules

Concentrate offers the best balance of research support, lower sugar, and value. Capsules are the most convenient but the one study that tested them found no sleep benefit. The researchers suggested that compounds in the whole juice may not survive processing into powder form, or that the dose was too low.

Storing tart cherry juice

Unopened juice and concentrate last for months in the pantry. Check the best-by date.

Once opened, refrigerate. Juice stays good for about 7-10 days. Concentrate lasts longer, usually several weeks refrigerated, because it's more concentrated and less prone to spoilage.

If you're using 1-ounce servings of concentrate, a single bottle lasts a while. Juice at 8-ounce servings goes faster. A 32-ounce bottle of juice lasts 4 days at the study dose.

Other benefits

The same compounds that help with sleep have other uses. Tart cherry juice has been studied for:

• Exercise recovery: Reducing muscle soreness and inflammation after intense exercise. This is one of the more established benefits, with multiple studies in athletes.

• Joint pain and arthritis: The anti-inflammatory properties may help with gout and osteoarthritis symptoms.

• General inflammation: The anthocyanins (anti-inflammatory compounds) in tart cherries are potent antioxidants.

These are not the focus of this article, but they're worth knowing if you're considering adding tart cherry juice to your routine.