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Six weeks ago, 19-year-old Issam Asinga, the fastest teen sprinter in world history, was handed a four-year ban from the sport of track & field after testing positive for the banned substance GW1516. Asinga’s positive sample came in July 2023, just days before he ran 9.89 seconds to become, at the time, the youngest person in history to break 10 seconds for 100 meters. Asinga, who had been provisionally suspended since August 2023 by the Athletics Integrity Unit (AIU), appealed the decision to the AIU’s disciplinary tribunal, who ruled against him and upheld the four-year suspension on May 27.

Until then, the details of Asinga’s case had been kept secret. Now they are public, and potentially explosive.

Asinga, who maintains his innocence, blamed the positive test on contaminated Gatorade gummies he received at the company’s National Athlete of the Year ceremony in Los Angeles last summer, where he was honored as high school track & field athlete of the year. Asinga has already appealed his case to the Court of Arbitration for Sport, where it is expected to be heard later this year. He is also mulling whether to launch a civil suit against Gatorade because the gummies in question falsely carried an NSF Certified for Sport label, which signified that the product did not contain any prohibited substances. NSF has made a public statement saying the gummies from Asinga’s lot number were not NSF Certified and the NSF Certified mark was being used without authorization.

“They distributed a supplement that wasn’t NSF Certified for Sport that had a banned substance in it,” said Asinga’s lawyer Paul Greene. “That’s violation of product liability law, negligence, implied warranty, New York state consumer protection law. I mean, it’s bad. He had the possibility of getting endorsement and NIL deals that were going to be in the millions of dollars and he lost all that as a result of this. He also lost out on the chance to compete in the World Championships and the Olympics.”

The AIU, however, was not satisfied that the gummies were the source of Asinga’s positive test, and its disciplinary tribunal agreed.

Incredible 2023 high school season

Asinga’s is one of the highest-profile doping cases in recent years. After running personal bests of 10.44 seconds in the 100m and 20.76 in the 200m as a junior in 2022 at Principia High School in Missouri, Asinga transferred to Montverde Academy in Florida for his senior year, where he improved enormously and produced one of the greatest seasons ever by a high school sprinter.

During the 2023 indoor season, Asinga won national high school titles in the 60m (6.59) and 200m (20.48) at New Balance Nationals, tying the national record in the former event (he ran 6.57 in the semis) and breaking the national record in the latter. Outdoors, Asinga ran a wind-aided 9.83 in the 100m to defeat Noah Lyles, who would go on to win the world title in that event four months later. Asinga, who was born in the US but represents Suriname internationally, then ran 19.97 in the 200m in April (#2 all-time among US high schoolers) and 9.89 in July to win the South American 100m title in Sao Paulo, Brazil. The latter time ranked Asinga in a tie for ninth in the world in 2023. It was also a world U20 record and was the first time a US high school athlete had broken the fabled 10-second barrier.

Now that world U20 record has been stripped as Asinga finds him at the center of controversy. The 43-page decision in his case released by the AIU presents only two possible versions of events.

Option A: An 18-year-old was caught doping barely a month after being added to the international testing pool. Then he or someone in his camp tried to cover up his doping by manipulating evidence and defaming Gatorade, one of the world’s largest sports nutrition companies.

Option B: One of the greatest sprint talents in history was unjustly banned after consuming a tainted supplement given to him by one of the most famous brands in sports.

Neither picture is particularly rosy for the sport of track & field, but one of them must be true. After reviewing the evidence, the AIU and its disciplinary tribunal is clear which version it believes: Option A. As a result, Asinga is banned from competition until 2027 barring a successful appeal to CAS.

Background: Asinga enters the testing pool

Most high school track athletes, even elite ones, are rarely drug-tested. But by the spring of 2023, Asinga was running so fast it was becoming clear he could be a factor at that summer’s World Championships in Budapest. He was added to the World Athletics Testing Pool on June 1.

Asinga was tested on June 11 and returned a negative result. He was tested again out-of-competition on July 18 (in his training base of Clermont, Fla.) and again at the South American championships on July 28. The July 18 sample tested positive for GW1516, a banned substance that modifies how the body metabolizes fat and has been found to cause cancer. Specifically, Asinga’s sample tested positive for low levels of two metabolites of GW1516 — a metabolite is a substance produced when the body breaks down a specific drug. In this case, Asinga’s urine contained the GW1516 sulfone metabolite (at a concentration of 0.2 nanograms per milliliter in both his A sample and B sample) and the GW1516 sulfoxide metabolite (at a concentration of 0.5 ng/mL in his A sample and 0.4 ng/mL in his B sample).

On August 9, Asinga was informed of his positive test and provisionally suspended from competition. Shortly after, in an effort to prove his innocence, he began sending his supplements to be tested for contamination at the Sports Medicine Research and Testing Laboratory (SMRTL), a WADA-accredited lab in Salt Lake City. The first supplement Asinga sent, melatonin gummies, tested negative. Asinga then sent a larger set of supplements, including Airborne and Skratch Lab Hydration packets as well as Gatorade Immune Support Gummies and Gatorade Recovery Gummies, two new products he had received at the Gatorade National Athlete of the Year ceremony on July 10.

All of the supplements tested negative for GW1516 except the Gatorade Recovery Gummies. In December, SMRTL informed the AIU that of the five gummies tested, four were positive for GW1516. That much, the parties agree on. From there, the narratives diverge.

Contaminated during manufacturing or as part of a coverup?

Asinga said he began taking the Recovery Gummies shortly after the ceremony on July 10 — initially two per day, then less consistently before traveling to Brazil for the South American championships on July 25. He said he did not take any gummies to Brazil. Asinga declared the gummies as a supplement on the doping control form for his July 18 test and said he had no concerns about the gummies because the container carried the NSF Certified for Sport label.

Greene said the AIU was initially reluctant to share the results of the SMRTL analysis with Asinga because it viewed the test results of products from an opened container as unreliable.  (LetsRun.com reached out to the AIU for comment on June 2 but had not received an answer as of publication).

“Normally, SMRTL’s process and the AIU’s process is if there is a preliminary finding in a supplement, they don’t initially just tell the athlete straight away,” Greene said. “They try to go and find their own sealed version and test that too and then go to confirmation testing.”

But neither SMRTL nor the AIU could find a sealed version from the same lot number as Asinga’s gummies. So, after several weeks, the AIU relented and shared the news that the Gatorade Recovery Gummies had tested positive for GW1516. Asinga said he felt he was on his way to clearing his name.

“I was like okay, boom,” Asinga told LetsRun.com. “When I got that message, I was like, okay, finally we’re going to move forward.”

But the AIU did not agree with Asinga’s assessment and hinted at something far more sinister. In the disciplinary tribunal hearing, which took place over Zoom on April 30, Martial Saugy, former director of the WADA-accredited lab in Lausanne, Switzerland, served as an expert witness for the AIU and noted that the exterior of the gummies contained much higher concentrations of GW1516 than the interior of the gummies.

“I cannot see how these results would be consistent with a contamination during the manufacture of the gummies,” Saugy said. “These results point to an adulteration of the gummies at a later stage.”

Another key point: Asinga had opened both containers of gummies before sending them to SMRTL. And in SMRTL’s analysis, it noted a “large discrepancy” between the concentration levels of GW1516 between the containers. The two gummies tested from the first container each featured a concentration of at least 610 ng of GW1516 per gummy. Meanwhile of the three gummies tested from the second container, the highest concentration of GW1516 was 1.5 ng per gummy, and one of the gummies did not test positive for GW1516 at all.

This fact left open the possibility for manipulation; to be satisfied of his innocence, the AIU demanded to see a positive test from a separate, sealed container of gummies from the same lot number as Asinga’s.

Separate lot numbers bring questions

This is where things get complicated. The lot number printed on Asinga’s gummy containers was 22092117150234. NSF has issued a statement saying this lot number was not NSF Certified and the NSF Certified mark was being used without authorization. As part of the case, the Lausanne lab did test a sealed container of Gatorade Recovery Gummies, which tested negative. But that container was from a different lot number — lot 22092117150213, which was one of the lots that did receive NSF certification.

The gummies were not manufactured directly by Gatorade, but rather by a company contracted by Gatorade called Better Nutritionals, who manufactured the gummies for Gatorade at its plant in Gardena, Calif. As part of its case, the AIU called a former Better Nutritionals employee as a witness who testified that, for all intents and purposes, lots 22092117150234 and 22092117150213 were identical. This witness, referred to only as Witness B in the decision, made the following argument:

Witness B said lots 22092117150213 and 22092117150234 were part of the same batch of 20,000 jars’ worth of gummies cooked on the same day. That batch of 20,000 jars was separated into two lots: 7,500 jars (lot 22092117150213) would enter the marketplace immediately without the NSF Certified for Sport logo, of which a few would be sent to NSF for testing. The remaining 12,500 jars (aka lot 22092117150234, which included the gummies Asinga received) would be held back and given the NSF Certified logo predicated on NSF testing on lot 22092117150213.

Before NSF testing had been completed, lot 22092117150213 entered the marketplace without the NSF Certified logo.

By October 4, the 12,500 jars from lot 22092117150234 had been labeled NSF Certified. On October 18, Better Nutritionals received confirmation that lot 22092117150213 had been granted NSF certification, which was confirmed on the NSF website.

As proof that the two lots were part of the same batch, Witness B noted that the first six digits of the lot number, which refer to the cook date, were identical: 220921, or September 21, 2022. Furthermore, Witness B said the seventh digit refers to the specific production line used at the factory. Again, both were the same — 1, referring to the first production line.

Witness B said it would not be feasible to produce two separate batches on the same day, noting that a batch with 20,000 jars’ worth of gummies would take roughly 19 hours to complete with a minimum of eight hours to clean the production line between batches.

Witness B and another witness from Better Nutritionals (Witness A) noted there was no logical source for contamination as GW1516 is not an ingredient of any of the other products manufactured in the Gardena plant.

To simplify: one lot of 7,500 jars (lot 22092117150213) was NSF Certified but did not bear the NSF label. Another lot of 12,500 jars (lot 22092117150234) was not NSF Certified but did bear the NSF label, and that is the lot Asinga’s gummies came from. Better Nutritionals claims the two lots were cooked as one large batch of 20,000 jars, and as a result, the fact that one lot was NSF Certified means that both lots should be considered NSF Certified.

To represent him in his appeal, Asinga hired Greene, the sports lawyer who previously represented Jarrion Lawson, Shelby Houlihan, Peter Bol, and many others in their high-profile doping cases. Greene said he does not buy Witness B’s argument.

“There’s no such thing as two lots of the same,” Greene told LetsRun.com. “They’re not the same. Every lot is separate according to NSF and according to FDA rules.”

After it was informed of Asinga’s positive test by the AIU, the NSF conducted its own investigation and issued the following public notice on June 4:

Gatorade® Immune Support Gummies (citrus; lot number 22091937150233) and Gatorade® Recovery Gummies (cherry; lot number 22092117150234), manufactured by Better Nutritionals LLC, have been found in the public domain bearing the NSF Certified for Sport® Mark without authorization. These specific lot numbers, for these products, have not been tested, evaluated or certified by NSF and are not authorized to use the NSF certification mark or make any claims of NSF certification.

Furthermore, Greene noted that Witness B was terminated for cause by Better Nutritionals in December 2022 — the same month Better Nutritionals filed for bankruptcy.

Asinga asked a representative at Gatorade for a sealed container from lot 22092117150234 — the lot from which Assinga’s gummies came — but was informed that Gatorade Recovery Gummies had been discontinued for “manufacturing reasons” (Witness A said the gummies were discontinued because Better Nutritionals went bankrupt). The AIU and SMRTL also requested sealed containers from the same lot, yet Gatorade/Better Nutritionals only made containers from lot 22092117150213 available. Greene says that makes no sense. If the two lots are identical, Greene argues, why not send one from the same lot number as Asinga’s?

“Somehow they had several sealed versions from the 7,500 lot but nothing from the 12,500 lot,” Greene said. “I find it hard to believe they don’t have anything out there and it was an intentional choice to withhold it. It had to be. Why else wouldn’t they give us one from both? What’s the difference?”

 

If Gatorade has no sealed version, Greene says, they are in violation of FDA regulations, which state that supplement manufacturers must hold reserve samples from each lot they produce.

Melissa Jefferson-Wooden delivered a sensational performance in Budapest, storming to victory in the women’s 100m at the inaugural World Athletics Ultimate Championship in a breathtaking 10.62 seconds.

The American produced a superb display of acceleration and composure to claim the World Ultimate Championship title while recording the fastest women’s 100m time in the world this year. Her 10.62 mark underlined her exceptional form and placed her firmly at the top of the global sprinting hierarchy.

Jefferson-Wooden controlled the race through the decisive stages and maintained her form all the way to the finish to secure a statement victory against a field packed with championship pedigree. She crossed the line ahead of Olympic champion Julien Alfred, who clocked 10.74 seconds with a -0.2 m/s wind, while Sha’Carri Richardson took third in 10.76.

Women’s 100m Final

1. Melissa Jefferson-Wooden — 10.62

2. Julien Alfred — 10.74 (-0.2 m/s)

3. Sha’Carri Richardson — 10.76

The victory was especially significant given the quality of the opposition. Jefferson-Wooden held her nerve against Alfred and Richardson, two of the most accomplished sprinters of the current generation, to produce the fastest performance in the world this year when it mattered most.

Alfred once again demonstrated her consistency at the highest level by taking silver, while Richardson completed an all-star podium in a race that brought together three of the biggest names in women’s sprinting.

But beyond the time, the title and the celebration, one of the most touching moments came after the race when Jefferson-Wooden embraced her father, Melvin, in an emotional celebration.

Their moment carried a deeply personal meaning. When Melissa was just 17 years old, she donated her stem cells to help her father undergo a bone marrow transplant after he was diagnosed with myelodysplastic syndrome. Years later, the two shared an unforgettable embrace in Budapest after she had become the World Ultimate Champion.

For Jefferson-Wooden, however, the evening was about far more than a medal. It was the culmination of an extraordinary journey, now highlighted by a world-leading 10.62 seconds on one of the biggest stages in athletics.

With the Ultimate Championship title secured and her father by her side, Jefferson-Wooden leaves Budapest with more than being an ultimate champion. She leaves with momentum, confidence and a powerful statement of intent — turning a high-profile showdown into one of the defining sprint performances of her season.

Audrey Werro has added another major title to her extraordinary season, storming to victory in the women’s 800m at the inaugural World Athletics Ultimate Championships in Budapest.

The Swiss star delivered a commanding performance, taking control from the opening gun and refusing to surrender the lead as she powered through an absorbing battle against two of the biggest names in the event.

Werro stopped the clock at 1:55.88 to become the Ultimate Championships 800m champion, producing another statement performance on one of the sport’s newest and most prestigious stages.

Behind her, Great Britain’s Keely Hodgkinson fought her way to second in 1:56.26, while the Netherlands’ Femke Broeders-Bol completed the podium in 1:56.74.

The result once again brought together the same formidable trio that featured on the podium at the European Championships, but Werro again proved to be the athlete who could rise above the challenge when it mattered most.

Her Budapest triumph is the latest chapter in a season that has already included records, a successful Diamond League Trophy defence and European Championship gold. Now, she can add the Ultimate Championships crown to a growing list of accomplishments.

Werro’s consistency has been particularly impressive in an 800m event packed with elite talent. Rather than simply relying on a fast finish, the Swiss athlete showed her authority by taking the initiative from the beginning and maintaining enough strength and composure to hold off Hodgkinson and Broeders-Bol all the way to the line.

The victory also underlined the remarkable depth of the women’s 800m, with three athletes separated by less than a second at the finish. Hodgkinson’s 1:56.26 and Broeders-Bol’s 1:56.74 showed just how fiercely contested the race was, but Werro’s decision to dictate the pace ultimately gave her the decisive advantage.

For Werro, this was more than another medal. It was another opportunity to demonstrate that her rise is no passing moment. On a stage featuring established champions and elite rivals, she once again produced the performance required to claim the biggest prize.

For Hodgkinson, the silver medal adds another major podium finish, while Broeders-Bol once again demonstrated her ability to compete with the very best over two laps.

But the spotlight in Budapest belonged unmistakably to Werro.

With another championship crown secured, the Swiss star has strengthened her claim as the athlete setting the standard in women’s 800m running. This is Audrey Werro’s era — and the rest of the field is chasing.

Busang Collen Kebinatshipi has delivered another sensational performance, storming to victory in the men’s 400m at the inaugural World Athletics Ultimate Championship in Budapest.

The reigning world champion stopped the clock at an astonishing 43.39 seconds, smashing his own Botswana national record and moving to fifth on the world all-time list.

Kebinatshipi produced a commanding finish to pull away from his rivals and secure the Ultimate Championship title. American star Rai Benjamin finished second in 44.15, while Jereem Richards of Trinidad and Tobago completed the podium in 44.23.

 Men’s 400m

1. Busang Collen Kebinatshipi — 43.39 NR

2. Rai Benjamin — 44.15

3. Jereem Richards — 44.23

The performance is even more remarkable considering that Kebinatshipi had already rewritten the Botswana record just one week ago in Brussels, where he ran 43.40. In Budapest, he lowered that mark by another 0.01 seconds to establish a new national record of 43.39.

That improvement has also propelled the 22-year-old into rare territory. His latest time now ranks him fifth fastest in history over 400m, placing him among an extraordinary group of athletes who have broken the 43.40 barrier.

Kebinatshipi's victory also caps an extraordinary season for the Botswana star. After establishing himself as a global champion, he has continued to demonstrate that he belongs among the very best one-lap runners in the world.

And there is a major reward for his historic night in Budapest: Kebinatshipi walks away as the Ultimate Champion and $150,000 richer.

From another national record to a place among the five fastest 400m runners ever, Kebinatshipi has turned an already remarkable season into something truly special.

Botswana has its latest sprinting superstar — and Kebinatshipi is showing that his ceiling may be even higher than anyone imagined. 

Marileidy Paulino once again proved why she is the undisputed queen of the one-lap event, powering to victory in the women’s 400m at the inaugural World Athletics Ultimate Championship in Budapest.

The Dominican Republic superstar produced a sensational 49.07 seconds to claim gold, pulling decisively away in the final straight and holding off a fiercely competitive field to extend her remarkable unbeaten run.

Paulino delivered her trademark combination of controlled speed and devastating finishing strength. She remained firmly in contention through the opening stages before unleashing her decisive move down the home straight, where she quickly opened a gap on her closest challengers.

Norway’s Henriette Jæger mounted a strong challenge but could not match Paulino’s finishing speed, crossing the line second in an impressive 49.28. Jamaica’s Nickisha Pryce completed the podium after clocking 49.56, ensuring that three of the world’s leading 400m talents occupied the medals.

The result once again underlined Paulino’s extraordinary consistency at the highest level. She entered Budapest as the world leader after running 48.48 in Paris in June, a performance that also set a Diamond League record. She subsequently remained unbeaten throughout her Diamond League campaign, closing the circuit with a meeting-record 48.64 in Brussels.

Budapest has also become a special venue in Paulino’s career. Three years ago, at the same National Athletics Centre, she captured her first individual world title, marking the beginning of another dominant chapter in her career. She later added Olympic gold in Paris in 2024, further establishing herself among the defining 400m athletes of her generation.

The inaugural World Athletics Ultimate Championship has brought together the sport’s biggest stars in a new winner-takes-the-spotlight format, with Olympic and world champions, Diamond League winners and leading performers competing for ultimate honours.

For Paulino, the occasion once again ended with Ultimate Crown on her arms.

With 49.07 seconds, she did more than win another major 400m title. She delivered another statement of authority, powering through the final straight with the confidence and speed that have made her one of the most dominant figures in modern women’s athletics.

Marileidy Paulino remains unbeaten, remains relentless and, once again, remains the queen of the one lap.

Jakob Ingebrigtsen has made a major decision regarding the remainder of his World Athletics Ultimate Championship campaign, confirming that he will withdraw from the men’s 1500m in Budapest despite producing a sensational performance to win the 5,000m title.

The Norwegian superstar stormed to victory in the inaugural Ultimate Championship 5,000m on Friday night, clocking a season-best 12:59.24 and delivering a devastating finishing kick to defeat Olympic 5,000m champion Cole Hocker and American Parker Wolfe.

Ingebrigtsen’s final 100 metres was arguably the defining moment of the race. The Olympic champion produced a remarkable 12.60-second closing 100m, powering away from the field to secure the $150,000 winner’s prize and underline just how far his fitness has progressed since returning from Achilles surgery.

The victory was particularly significant after what has been an extremely difficult period for the 25-year-old. Earlier in the season, Ingebrigtsen faced serious uncertainty over whether he would even be able to compete at the highest level again. His return has gradually gathered momentum, and his performance in Budapest offered perhaps the clearest indication yet that the Norwegian is rediscovering his formidable racing ability.

But rather than risk pushing his recovering body further, Ingebrigtsen has now opted to step away from the 1500m.

The decision means the highly anticipated showdown with British rival Josh Kerr will not take place in Budapest after all. The two stars had been expected to renew one of the biggest rivalries in modern middle-distance running in the 1500m final.

Instead, Ingebrigtsen is looking beyond the immediate opportunity and towards the bigger picture.

“I’m thinking about 2027… Fitness cannot be faked,” the Norwegian said, signalling that protecting his long-term condition has become more important than chasing another major victory only days after his return to peak-level competition.

The decision comes just one week after an emotionally charged Diamond League Final in Brussels, where Ingebrigtsen finished fourth in the 1500m behind Australia’s Cameron Myers, Kenya’s Phanuel Kipkosgei Koech and American Ethan Strand.

After that race, Ingebrigtsen delivered a fiery assessment of his rivals and questioned the tactics surrounding the pacemaking, particularly involving Hocker. He later acknowledged that there had been “a little too much adrenaline and emotion” when microphones were placed in front of him immediately after the race.

Yet his latest decision shows that beneath the emotion and competitive intensity lies a longer-term strategy.

Ingebrigtsen has already demonstrated that he can compete at an elite level again. His 12:59.24 in Budapest was not simply a victory — it was a statement that the Norwegian remains capable of producing a world-class finish even after months of injury rehabilitation.

Now, however, he is choosing not to gamble with that progress.

For a runner who has spent much of the year fighting his way back from injury, another 1500m race could have offered enormous rewards but also carried unnecessary risk. By withdrawing, Ingebrigtsen is effectively prioritising longevity over one more opportunity for immediate glory.

His message is clear: the comeback is underway, but it will not be rushed.

The 5,000m victory has given Ingebrigtsen confidence, momentum and perhaps, most importantly, proof that his body can once again handle elite competition.

Now comes the harder part — knowing when to stop.

With 2027 already firmly in his sights, the Norwegian has chosen recovery over risk. And after everything he has endured, that could ultimately prove to be one of the most important decisions of his comeback.

Jakob Ingebrigtsen is not walking away from the sport. He is protecting his future in it.