THE PURPLE PAPER: ANTHOCYANINS

Anthocyanins: Natural Performance & Recovery Gains

Anthocyanins are powerful plant compounds found in dark berries, including New Zealand blackcurrants. A growing body of sports nutrition research shows that anthocyanins can enhance exercise performance, support blood flow and accelerate recovery from hard training.

How Do Anthocyanins Work?

One of the key mechanisms that produces the performance-enhancing qualities of anthocyanins is improved vascular function.

Anthocyanins can increase nitric oxide availability and improve blood vessel function. In simple terms, they support blood flow during exercise. Better circulation means our muscles can get hold of oxygen and nutrients more quickly and effectively. Pretty cool!

Anthocyanins may also help regulate oxidative stress, the cellular damage caused when hard exercise produces more harmful molecules than the body can naturally manage.

How Anthocyanins Change the Fuel You Burn

A 2026 meta-analysis pooled 15 controlled trials (226 participants) of New Zealand blackcurrant extract. Across the trials, blackcurrant increased fat oxidation during exercise by 0.042 g/min (95% CI 0.017 to 0.068, p<0.001) and reduced carbohydrate oxidation by 0.099 g/min (95% CI -0.176 to -0.022, p=0.012). Most trials used daily dosing for about a week, with exercise at moderate intensity.

Why this matters for longer events

In long races, carbohydrate stores are limited, while fat is a much larger fuel store. That makes changes in how much fat the body uses of particular interest to researchers studying events like marathons and triathlons, where fat oxidation capacity has been linked to Ironman performance. Whether blackcurrant's effect on fuel use translates into faster race times hasn't been tested yet.

Men and women

Two analyses found no difference between men and women in the average response. In a study of 11 men and 11 women, seven days of blackcurrant extract raised fat oxidation during an hour of treadmill exercise from 0.21 to 0.27 g/min (p<0.001), with no difference between the sexes. A separate analysis of data from 46 women and 71 men reached the same conclusion.

Your response is individual

Not every athlete responds in the same way, and not every study has found a change. Researchers have found that response relates partly to baseline fuel use: athletes who burn proportionally more carbohydrate at a given intensity tend to show the biggest shift. And when athletes were tested repeatedly, a subset responded consistently. In a repeated-dosing study of high-intensity running, 8 of 16 participants improved beyond the smallest worthwhile change in both trials, gaining 16.7% in total running distance on average. That's why we suggest trying the loading protocol in training before your target race.

Study conditions: most trials used 210 mg of anthocyanins per day for around 7 days, with exercise at moderate intensity. The responder data on running distance comes from high-intensity intermittent treadmill running, not endurance racing.

Performance Enhancing Evidence

Research on New Zealand blackcurrant extract has demonstrated measurable improvements in exercise performance.

In a double-blind, placebo-controlled cycling study, seven days of blackcurrant supplementation improved 16.1 km cycling time-trial performance by 2.4% compared with placebo; this equates to an average 44-second improvement. The same study found a 27% increase in fat oxidation during moderate-intensity exercise.

A separate controlled study found that seven days of blackcurrant supplementation increased total running distance during a high-intensity intermittent running test by 10.6%, with a 10.8% increase in sprint distance.

These results support the role of anthocyanins as a powerful performance-enhancing ingredient, particularly for endurance and high-intensity exercise.

Recovery Benefits

Anthocyanins are probably best known for their impact on recovery. The evidence for recovery is particularly strong following high-intensity exercise that causes muscle damage, such as hard intervals sessions or gym work.

A 2021 study found that New Zealand blackcurrant supplementation substantially improved recovery following strenuous eccentric exercise. The study looked at the prevalence of creatine kinase, which is the key marker of exercise-induced muscle damage.

At 96 hours post-exercise, the study found 84% lower creatine kinase compared with placebo. Strength recovery was also significantly faster, while muscle soreness was reduced during the recovery period.

This study provided clear evidence that anthocyanins (derived from New Zealand Blackcurrants) reduced muscle damage response.

The Take Home

Anthocyanins can help you perform better and recover faster. And unlike a traditional pre-workout stimulant, anthocyanins are not designed to give you a temporary buzz. Their effects are linked to the body's underlying physiological response to exercise.

This makes anthocyanins a natural choice for health-conscious athletes who train frequently and need to get the most from every session.