Vitamin B6, commonly found in foods like bananas, chickpeas, and poultry, is essential for brain development, immune function, and metabolism. However, increasingly, doctors are seeing a disturbing trend: more Australians are unknowingly suffering nerve damage, migraines, and other serious symptoms after regularly consuming high doses of synthetic vitamin B6, often through energy drinks, multivitamins, and protein powders.Energy drinks like Red Bull, Monster, Mother, and BSC Energy are under scrutiny for containing significantly more B6 than what’s recommended in a healthy diet. A standard 250ml can of Red Bull contains 5mg of B6, nearly four times the recommended daily intake of 1.3–1.7mg for adults. BSC Energy's 500ml can goes even further with 10mg of B6, the legal upper limit set by Food Standards Australia New Zealand (FSANZ).And while a single can won’t push most people into dangerous territory, doctors warn it's the accumulation that matters.“It’s Not Just One Product”“There’s no good reason why energy drinks need to have six times the recommended daily intake of B6 in them,” says Alexandra Jones from the George Institute for Global Health, as reported in ABC News. She points out that people often consume these drinks alongside other B6 sources, like breakfast cereals, magnesium tablets, multivitamins, and fortified protein powders, increasing their total intake exponentially.Pathology labs have reported over 2,700 probable cases of B6 toxicity in Australia just this year, with most cases linked to stacked consumption of various B6-containing products.Dr Terri-Lynne South, a GP and dietitian, as reported by ABC News, believes these numbers are just the tip of the iceberg. “If an energy drink were sold as a vitamin supplement with 10mg of B6, it would require a warning label,” she points out. Yet many energy drinks bypass this by marketing themselves as beverages, not therapeutic goods.Case Study: Blackmores and the Warning Signs IgnoredThis isn’t the first time vitamin B6 has come under fire. In 2022, Australian supplement giant Blackmores faced mounting criticism, and now a class action investigation, over several of its products allegedly containing dangerously high levels of B6. Health and Me had also previously reported on the same.ALSO READ: Over-the-Counter Vitamin B6 Linked To Nerve Damage: Hundreds Join Class Action In AustraliaPenny Thompson, a 61-year-old from Wollongong, is one of hundreds who reported alarming symptoms, from numbness in the limbs to a paralyzed vocal cord, after prolonged supplement use. “I could not speak, I had to leave my teaching job. My feet felt like they were being stabbed,” she shared with The Sydney Morning Herald.Despite halting her supplement intake, Penny's symptoms have persisted for years. Her case is now part of a growing legal investigation that may change how supplements and energy drinks are regulated across the country.What B6 Toxicity Looks LikePeripheral neuropathy, damage to nerves outside the brain and spinal cord, is the most common result of B6 toxicity. Symptoms may include:Burning or tingling in the hands and feetNumbness and muscle weaknessHeadaches and dizzinessDifficulty walking or balance issuesGut pain or nauseaThese symptoms often develop slowly and are misdiagnosed, delaying treatment and increasing long-term damage.One man, known as Matthew, began drinking Berocca daily for an energy boost. He later developed extreme burning sensations and nerve pain. His blood tests revealed nearly three times the toxic threshold of B6. “I thought it was just vitamins… I never thought you could poison yourself with it,” he said.READ MORE: Can Vitamin B6 Deficiency Cause Seizures?Are Energy Drinks the New Health Hazard?With B6 levels in food and drinks going largely unchecked for cumulative risk, experts argue that regulators are lagging behind consumer trends.The Therapeutic Goods Administration (TGA) recently recommended that supplements containing over 50mg of B6 be moved behind pharmacy counters. They’ve also suggested FSANZ re-evaluate the 10mg B6 limit in energy drinks, considering the cumulative exposure from various products.Still, many in the medical field believe this isn’t enough.Dr South believes clearer labelling, stronger warnings, and public education are key: “People are inadvertently overdosing… and now we’re starting to see the consequences.”Energy, at What Cost?While energy drinks and supplements are often marketed as wellness products, promising more energy, better focus, or immune boosts, their health halo is cracking. The case of B6 toxicity reveals a darker reality: sometimes, more isn’t better.For healthy individuals without a diagnosed deficiency, experts recommend getting B6 naturally from a balanced diet. Supplements, whether in pill or energy drink form, should be taken only under medical guidance.Until then, that afternoon pick-me-up may not be as harmless as it seems.