Tart Cherry and Inflammation: What the Research Says in 2025

Tart cherry has had a good few years. It started as a niche trick that marathon runners and rugby players used before big events, and it has since become one of the most studied natural recovery aids in sports nutrition. But popularity and evidence are two different things, and if you have been fuelling with it (or thinking about it), you deserve to know which claims stand up and which are marketing.

This is our attempt to summarise the tart cherry inflammation research as it stands now: what the trials actually measured, what the effect sizes look like, where the results are mixed, and how to use that information sensibly as an endurance athlete. We sell tart cherry pastilles, so read this with that in mind. We have tried to be honest about the gaps as well as the wins.

Why Inflammation Matters to Endurance Athletes

Hard training damages muscle. That is not a problem; it is the point. Micro-tears in muscle fibres trigger an inflammatory response, and that response is part of how the body repairs and adapts. The trouble starts when the inflammation is bigger or lasts longer than it needs to. A hilly 100-mile sportive, a marathon, or three big days back to back can push markers like C-reactive protein (CRP), interleukin-6 (IL-6) and creatine kinase (CK) well above baseline, and they can stay elevated for 48 to 72 hours.

During that window you feel it as DOMS, heavy legs and a drop in power output. Studies on marathon runners have recorded strength losses of 20 to 30 percent in the days after the race. If your next quality session is within that window, you are training on compromised legs. That is the practical reason athletes care about the tart cherry inflammation research: not to switch inflammation off, but to shorten the recovery window so the next session is productive.

Tart Cherry Inflammation Research: The Key Trials

The compounds doing the work are anthocyanins, the pigments that give Montmorency cherries their deep red colour. Montmorency tart cherries contain roughly 30 to 40 mg of anthocyanins per 100 g of fruit, along with other polyphenols such as quercetin and chlorogenic acid. Anthocyanins reduce oxidative stress by neutralising free radicals and appear to dampen the enzymes (COX-1 and COX-2) that drive the inflammatory cascade, which is the same pathway targeted by over-the-counter anti-inflammatory drugs.

The trials that get cited most often follow a similar pattern: athletes take tart cherry for five to seven days before a hard event, continue for two to three days after, and researchers compare blood markers and function against a placebo group. Some of the most useful results:

• Marathon runners: A study on the London Marathon found that runners taking tart cherry juice for five days before and two days after the race recovered isometric strength significantly faster than placebo, with lower CRP and IL-6 and reduced markers of oxidative stress (protein carbonyls and TBARS).
• Cyclists: Trained cyclists doing three consecutive days of simulated road racing (around 109 minutes per day) showed lower IL-6 and CRP with tart cherry compared to placebo, and reported less perceived muscle soreness.
• Strength and power: Multiple trials on eccentric exercise and resistance training show smaller strength losses and faster return to baseline, typically in the range of 4 to 10 percent better retention of force.
• Meta-analyses: Pooled reviews of tart cherry trials generally report a modest but consistent benefit for muscle soreness and recovery of function, with the strongest effects when supplementation starts at least four days before the event.

The consistent thread in the tart cherry inflammation research is that it works as a loading strategy, not a rescue. Taking it once after a race does very little. Taking it daily for a week before and a few days after produces measurable changes in inflammatory markers and, more importantly, in how fast your legs come back.

Where the Evidence Is Weaker

It would be dishonest to pretend every study agrees. A few honest caveats:

• Sample sizes are small. Most trials have 10 to 30 participants. The effects are consistent in direction but the confidence intervals are wide.
• Dose varies. Studies have used anywhere from 30 ml of concentrate twice daily to 480 mg of freeze-dried powder. Effective doses appear to sit somewhere between 250 and 500 mg of total anthocyanins per day, but there is no agreed standard.
• Blunting adaptation is a real question. Some researchers worry that suppressing inflammation year-round could reduce the training signal. The data here is mixed. High-dose antioxidant vitamins (C and E) have shown this effect; polyphenol-rich whole foods generally have not. Still, the sensible approach is to use tart cherry strategically around key events and high-load blocks rather than every day of the season.
• Sleep findings are promising but early. Tart cherry contains a small amount of melatonin and has improved sleep duration in some trials, but the effect on athletic performance through sleep has not been isolated.

None of this means it does not work. It means the effect is moderate, it depends on timing, and it is not a substitute for the basics: 1.2 to 1.6 g of protein per kg of bodyweight, enough carbohydrate to refill glycogen, and eight hours of sleep.

How to Use Tart Cherry Around a Big Event

Based on the protocols that produced results, here is a practical schedule for an A-race or a heavy training block:

• Days 5 to 1 before: Take tart cherry twice daily, morning and evening, to build anthocyanin levels in the blood. This is the loading phase that matters most.
• Race day: Continue as normal. If your tart cherry comes in an easy-to-carry form, it can double as part of your on-course fuelling.
• Days 1 to 3 after: Keep taking it while inflammatory markers are peaking. This is where the strength-retention benefit shows up.
• Between blocks: Ease off. Let normal training inflammation do its job.

Aim for roughly 250 to 500 mg of anthocyanins per day during the loading window. Pair it with your usual recovery meal rather than replacing it.

What We Use at FTP Endurance Fuel

We built our Tart Cherry Pastilles as a tart cherry flavoured energy chew. They are a fuelling product, not a tart cherry supplement: each pastille is a 1:1 glucose-to-fructose carbohydrate source, and they do not contain Montmorency cherry or deliver anthocyanins. On a long ride we eat them at 60 to 90 g of carbohydrate per hour like any other chew. If you want real Montmorency tart cherry, it's in Power Fluids (3g of dried Montmorency per serving).

The 1 kg bulk pack is the sensible option if you fuel long sessions every week, because you get through them. If you want to see whether the flavour and texture suit you before committing, the taster pack is a low-commitment way to try them.

Tart cherry is not magic, and anyone who tells you it will erase DOMS is overselling it. What the research does support is a modest, repeatable reduction in inflammation and oxidative stress, and faster recovery of muscle function, when you load it for several days around hard efforts. For an endurance athlete trying to string together quality sessions, that is worth having. If you have a big event on the calendar, start five days out, keep going three days after, and judge it by how your legs feel on the Tuesday. Choose a tart cherry product with a stated Montmorency dose and give the protocol a proper trial.