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We tapped a registered dietitian and poured over the latest research to find out. 

These are the days when one would go online seeking nutrition remedies for every imaginable condition and find every imaginable solution. But long before Google delivered instant suggestions on what to eat for better health and performance, apple cider vinegar (ACV) has been one of the leading word-of-mouth health remedies. 

The promises are enthusiastic: better blood sugar control, improved heart and immune health, reduced cancer risk, and weight loss (if that’s your goal) to name a few. 

So, you’re probably wondering what science has to say. Can ACV really go the distance in helping us stay healthy for longer? Here’s the truth on whether sour has the power. 

What exactly is apple cider vinegar?

While vinegar can be gleaned from various starting materials including grapes and rice, apple cider vinegar is produced by pulverizing apples into a slurry of juice and pulp that is then allowed to ferment in the presence of bacteria and yeast. This converts the fruit sugar largely into acetic acid (among other types) and produces various flavor compounds, which lends the vinegar its strong sour smell and sharp flavor.

What are the health benefits of apple cider vinegar?

Though singled out as a remedy for a laundry list of ailments, some purported health perks may hold true.

Foremost, the high levels of acetic acid in ACV may help with blood sugar control and improve certain blood lipids, according to a 2021 systematic review and meta-analysis in the Journal of the Academy of Nutrition and Dietetics. Acetic acid was also found to lower concentrations of blood triglycerides among those who were overweight or obese and in those with type 2 diabetes, which may promote better heart health. Additionally, another review study in the journal BMC Complementary Medicine and Therapies found enough evidence to suggest that apple cider vinegar used for longer than two months can improve blood sugar management and blood cholesterol levels. 

An investigation in the European Journal of Clinical Nutrition found that when people consumed white bread with vinegar, there was a lower blood glucose and insulin response, as well as improved ratings of satiety, than when they consumed the same amount of bread without the vinegar. The higher the acetic acid content of the vinegar the greater the impact. 

Though we often think of improved blood sugar control as something that’s only important for people with diabetes, Molly Kimball, R.D., registered dietitian with Ochsner Health in New Orleans, tells Runner’s World it’s beneficial for everyone, including runners. “Maintaining steady blood sugar levels—meaning avoiding the peaks and valleys—as much as possible is key for optimizing energy, mood, and fending off cravings, to name a few.”

The slower release of blood sugar into the bloodstream with apple cider vinegar use and the subsequent rise in hunger-reducing hormones could result in feelings of fullness and, therefore, potential weight loss over time. 

ACV can improve blood sugar numbers, which Kimball says are most likely to occur when it’s paired with carb-rich foods, because it reduces the activity of an enzyme that breaks down starch and increases the uptake of glucose into tissues—including skeletal muscle—by improving insulin sensitivity and blood flow. 

But keep in mind that we don’t know what impact is on people without any impaired insulin sensitivity or blood sugar control, including healthy runners. And, noticeable blood sugar improvement may only occur when apple cider vinegar is added to meals containing high glycemic index foods and drinks like white bread, juice, potatoes, and white pasta. 

Kimball adds that it’s also unclear how apple cider vinegar’s metabolic effects vary from any other kinds of vinegar. Though most of the research has been conducted on apple cider vinegar, the blood sugar benefits may not differ a great deal among different varieties of vinegar like balsamic and white wine, since they also contain acetic acid. 

Since apple cider vinegar is a fermented food product, Kimball says it could, in theory, supply probiotics to improve our microbiome, which is the population of microbes in our digestive tract that appear to play a big role in overall health. After analyzing blood and stool samples of healthy adult participants, Stanford School of Medicine researchers discovered that a 10-week diet high in fermented foods (6 servings daily) resulted in measurable improvements in microbiome diversity and decreases in markers of inflammation.

“However, because we’re typically consuming such small volumes, it doesn’t seem likely that apple cider vinegar would be a significant source of probiotics in our diet compared to other fermented foods,” says Kimball. “Instead, I would look at it as every bit helps.” To date, there are no studies specifically addressing apple cider vinegar’s impact on the microbiome.

It’s likely that apple cider vinegar contains small amounts of the various phytochemicals found in the apples it is produced from. These phytochemicals could give the vinegar some antioxidant activity to help reduce cell damage in the body that may offer protection from various conditions like cognitive decline. 

“But, the amount of antioxidants you’d get from typical serving sizes of apple cider vinegar is likely much less than what you would get from whole apples and other fruits,” Kimball says. “I would not count on it to give us a significant impact in terms of antioxidant benefit.” 

Here’s how to add apple cider vinegar to your diet

The easiest way to incorporate ACV into your diet is to use it in salad dressings. You can also toss it into cooked grains and use it in sauces and homemade condiments for some vinegary tang. Pickled vegetables can also be another source of acetic acid in your diet.

Some people will dilute the ACV in water and drink it before meals, which could improve post-meal blood sugar numbers. “I typically recommend diluting 1 ounce [of ACV] in about 4 ounces of water, herbal tea, or other types of no-sugar beverages,” Kimball says. However, she cautions that it’s essential to adequately dilute the vinegar—due to its acidic nature, it can damage the gastrointestinal tract and tooth enamel. 

Ideally, you want to use an unfiltered apple cider vinegar that contains a cobweb-like floating substance referred to as the “mother” and has an amber color with a cloudy appearance. Bragg is one of the most popular brand options. Most commercial apple cider vinegar takes shortcuts from the longer fermentation process so it won’t have the same flavor nuances or probiotics. 

You can also find apple cider vinegar in capsule and gummy form, but it’s not known if these are as helpful and there can be quality control issues.

The bottom line is...

Though the research holds some promise, especially related to blood sugar management when eating your higher carb meals, the quality of evidence surrounding the benefits of apple cider vinegar is not yet there and we don’t yet know if it is any better for you than other vinegar varieties. At the very least, it can make vegetables taste more exciting so you’ll want to eat more of them, which is certainly something to celebrate. 

Most Olympic marathoners spend their youth focused on running. They join track clubs, compete in national championships, and pursue the sport from an early age.

Julia Mayer’s journey was very different.

Today, Mayer is Austria’s marathon record holder, a multiple national record holder on the roads, and an Olympian. Yet for much of her athletic life, running was not her primary sport.

For 16 years, she played soccer.

Then she discovered something that would change her life.

“I noticed that I was really fast in the fun runs and that it was really, really fun,” Mayer said when reflecting on her transition from soccer to distance running.

What began as curiosity quickly became a passion. She eventually made the bold decision to leave soccer behind and focus entirely on running. It was a move that surprised many people around her, but Mayer believed she had found her true athletic calling.

The decision proved to be the right one.

Within a few years, Mayer developed into one of Europe’s top marathon runners. Her steady improvement carried her from local races to the international stage, where she began rewriting Austria’s record books.

She now holds Austrian records in the marathon, half marathon, and road 10K. Her marathon best of 2:26:08 established her as the fastest female marathoner in Austrian history. Her performances in the half marathon and 10K have further cemented her place among the country’s all-time great distance runners.

Her rise culminated with qualification for the 2024 Olympic Games in Paris.

Competing in the Olympic marathon represented the realization of a dream. On one of the most challenging marathon courses ever used for the Olympics, Mayer ran courageously against the strongest field in the world and finished 55th in her Olympic debut.

Behind the scenes, success has come through extraordinary dedication. During marathon preparation, Mayer trains twice a day and covers approximately 200 kilometers, or 124 miles, each week. The workload demands discipline, patience, and a deep commitment to continuous improvement. 

What makes her story especially inspiring is not simply the records or the Olympic appearance.

It is the fact that she found her greatest talent later than many elite runners.

In a sport where athletes are often identified at a young age, Mayer’s journey serves as a reminder that potential does not always reveal itself early. Sometimes it takes years of experience, a willingness to try something new, and the courage to follow a different path. 

The former soccer player who once chased a ball across a field is now chasing history on the roads of Europe.

And according to those closest to her, her best performances may still be ahead.

For runners of every age and ability, Julia Mayer’s story delivers a powerful lesson: it is never too late to discover what you are capable of.

From soccer player to Olympian, her journey proves that remarkable achievements can begin when least expected.

Megan Keith produced the performance of her career in Oslo on Thursday night, shattering one of Scotland’s longest-standing distance running records and cementing her place among Britain’s greatest female 3000m runners.

The 24-year-old clocked a sensational 8:28.35 over 3000m, breaking the Scottish outdoor record that had stood for nearly four decades. In doing so, Keith eclipsed the previous mark of 8:29.02, set by Scottish legend Yvonne Murray back in 1988, ending a record reign that had lasted 38 years.

Keith’s breakthrough run was more than just a national record. The performance also propelled her to third on the UK outdoor all-time list, placing her behind only two of Britain’s most celebrated distance runners — Paula Radcliffe, who leads the rankings with 8:22.20, and Laura Weightman, whose 8:26.07 remains the second-fastest outdoor mark by a British woman.

The significance of Keith’s achievement is amplified by the calibre of athletes she now joins in the record books. For decades, Murray’s mark stood as one of Scottish athletics’ most untouchable records, surviving generations of elite competitors. Keith has now succeeded where many outstanding runners have fallen short, announcing herself as one of the leading distance talents in British athletics.

Her time also compares favourably with the best performances produced indoors. Olympic medallist Laura Muir ran 8:26.41 indoors in Karlsruhe in 2017, underlining just how exceptional Keith’s outdoor effort in Oslo truly was.

The run continues a remarkable rise for the Scottish star, whose progression over recent seasons has transformed her from a promising prospect into a genuine force on the international stage. Running with confidence and composure against elite competition, Keith demonstrated both the speed and endurance required to challenge the very best in Europe and beyond.

With the World Championship season gathering momentum, Keith’s record-breaking display sends a powerful message. Not only has she etched her name into Scottish athletics history, but she has also established herself as a serious contender in one of the sport’s most competitive events.

In Oslo, Megan Keith did far more than break a record. She ended a 38-year wait, climbed into the upper echelon of British distance running, and delivered a performance that may prove to be a defining moment in her career.

British middle-distance talent Phoebe Gill took another significant step forward in her return to top form, producing a determined victory over 800 metres at the Meeting de Marseille in France on Wednesday.

Competing in challenging, wind-affected conditions, the 19-year-old demonstrated both resilience and composure as she held off a late charge from Switzerland's Veronica Vancardo to secure the win in 2:00.81. Vancardo finished just three hundredths of a second behind in 2:00.84, underlining the fiercely contested nature of the race.

While the margin of victory was narrow, the result represented another encouraging milestone for Gill as she continues to rebuild momentum following her injury setback. The young Briton showed impressive race awareness and strength in the closing stages, maintaining her advantage despite the difficult conditions that made fast running a challenge throughout the evening.

The Marseille triumph adds to a growing body of evidence that Gill is steadily progressing toward her best form. Earlier in her comeback campaign, she clocked 2:01.50 for 800m in Bydgoszcz before demonstrating her versatility with a strong 4:05.53 performance over 1500 metres at the BMC Grand Prix meeting in Trafford.

Those performances have highlighted not only her improving fitness but also her ability to compete across multiple distances as she carefully builds her season. The Marseille victory now provides further confirmation that the European junior star is moving in the right direction.

Gill emerged as one of Britain's most exciting middle-distance prospects through a series of breakthrough performances as a teenager, earning widespread recognition for her fearless racing style and remarkable maturity. Injury temporarily interrupted that upward trajectory, but her recent results suggest she is steadily rediscovering the form that made her one of the sport's brightest young talents.

With each race, the signs of progress become increasingly evident. Winning in difficult conditions and under pressure from a quality field is often a stronger indicator than a fast time alone, and Gill's latest success demonstrated exactly those qualities.

As the summer season gathers pace, the Marseille victory offers another confidence boost for the British teenager, whose return continues to gain momentum. If her recent progression is any indication, Gill could soon find herself back among the leading names on the European middle-distance circuit. 

The NCAA Track and Field Championships delivered a moment few could have predicted as Ja’Kobe Tharp produced one of the most astonishing performances in the history of sprint hurdling, rewriting the record books in spectacular fashion.

Competing in the opening round of the men’s 110-meter hurdles, the Auburn star stunned the athletics world by clocking an incredible 12.75 seconds, becoming the first athlete ever to break the 12.80-second barrier. In doing so, he eclipsed the long-standing world record of 12.80 set by Aries Merritt in 2012, a mark that had stood as one of the sport’s most revered achievements for more than a decade.

What makes Tharp’s breakthrough even more remarkable is the scale of his improvement. Entering the championships, the defending NCAA and U.S. champion had recorded a season-best of 13.05 seconds. Yet under the brightest spotlight, he unleashed a performance that exceeded every expectation, slicing an extraordinary 0.26 seconds from his personal best in a race that instantly became one of the greatest ever run.

The achievement sent shockwaves throughout the track and field community. While Tharp arrived in Eugene as one of the leading contenders for the NCAA title, few envisioned a performance capable of redefining the limits of the event. Instead, the American hurdler delivered a race for the ages, combining flawless technique, explosive speed, and impeccable rhythm from the first hurdle to the finish line.

The historic run not only secured his place in athletics history but also transformed the outlook of the championship. With the world record now in his possession, Tharp advances to the final as the overwhelming favorite, carrying momentum that could make an already unforgettable weekend even more extraordinary.

For years, the 12.80 barrier appeared untouchable. On a stunning day at the NCAA Championships, Ja’Kobe Tharp proved otherwise, producing the kind of performance that reminds fans why sport remains so unpredictable. In a matter of seconds, he turned a routine qualifying round into a landmark moment that will be remembered for generations.

The world record no one saw coming is now a reality—and Ja’Kobe Tharp is the man who changed history.

A new chapter in middle-distance running may have begun in Oslo after American teenager Cooper Lutkenhaus produced one of the most remarkable performances of the season, narrowly defeating reigning Olympic champion Emmanuel Wanyonyi in a thrilling men's 800m contest at the Diamond League meeting.

The 17-year-old sensation shocked a world-class field by crossing the finish line first in a race that came down to the smallest of margins. After an intense battle over the final metres, Lutkenhaus held off Wanyonyi by just one hundredth of a second, producing a dramatic finish that left the packed stadium in disbelief.

From the opening lap, the pace was relentless as the leading contenders positioned themselves for a fierce showdown. As the athletes entered the home straight, Wanyonyi appeared poised to unleash his trademark finishing kick. However, Lutkenhaus refused to be intimidated, matching the Olympic champion stride for stride before producing a perfectly timed lean at the line to secure a historic victory.

The result marks a breakthrough moment for the young American, who continues to establish himself as one of the brightest talents in global athletics. Defeating an Olympic champion at a Diamond League event is a feat many athletes spend entire careers pursuing, yet Lutkenhaus achieved it before reaching adulthood.

For Wanyonyi, the narrow defeat does little to diminish his status as one of the world's premier 800m runners. The Kenyan once again demonstrated his exceptional class and competitiveness, pushing the race to a world-class standard and forcing his young rival to deliver the performance of a lifetime.

Beyond the result itself, the race offered a glimpse into what could become one of the sport's most exciting rivalries in the years ahead. With established stars and emerging talents now pushing each other to new heights, the men's 800m continues to evolve into one of athletics' most captivating events.

On a memorable night in Oslo, the spotlight belonged to Cooper Lutkenhaus. At just 17 years old, he stood toe-to-toe with an Olympic champion and emerged victorious, announcing himself to the athletics world in spectacular fashion.