Health
FDA warns that nicotine-like chemicals in vapes may be more potent than nicotine
- Nicotine alternatives like 6-methyl nicotine in vapes may be more addictive than nicotine, according to the FDA.
- These synthetic substances are not regulated by U.S. tobacco and vaping laws that control traditional nicotine.
- Traditional nicotine is derived from tobacco leaves, while 6-methyl nicotine is synthesized in labs using chemicals.
Nicotine alternatives used in vapes being launched in the U.S. and abroad, such as 6-methyl nicotine, may be more potent and addictive than nicotine itself, though the scientific data remains incomplete, according to the U.S. Food and Drug Administration (FDA) and independent researchers.
The synthetic substances – which have a chemical structure similar to that of nicotine – are not subject to U.S. tobacco and vaping regulations that are designed to control traditional nicotine, a highly addictive drug.
That means manufacturers can sell vapes containing synthetic nicotine analogues such as 6-methyl nicotine in the United States without seeking authorization from the FDA – a process that can be costly, time-consuming and is often unsuccessful.
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Big tobacco firms like Altria Group and British American Tobacco have already lost substantial U.S. sales to an influx of disposable vapes containing traditional nicotine that are being illegally sold without FDA authorization.
Various vapes, nicotine products and the new Spree Bar, which contains a chemical that mimics nicotine, line the shelves at Sultans’ Smoke in Arvada, Colorado, on May 21, 2024. (REUTERS/Kevin Mohatt/ File Photo)
Altria, the maker of Marlboro cigarettes in the United States, highlighted the emerging use of 6-methyl nicotine in vapes and other smoking alternatives in a May 9 letter to the FDA, according to a copy of the correspondence posted on its website.
It urged the agency to evaluate the compounds and establish what authority it had over them, warning they posed a “new threat” to regulation of the sector.
“The introduction and growth of chemicals intended to imitate the effects of nicotine, if left unchecked, could present unknown risks to U.S. consumers and undermine FDA’s authority,” the letter said.
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It cited SPREE BAR, a vape launched in October by Charlie’s Holdings Inc that uses 6-methyl nicotine.
The FDA does not comment on its correspondence with individual firms.
In response to Reuters’ questions about 6-methyl nicotine and other nicotine alternatives, the FDA said in a statement: “Although more research is needed, some emerging data show these nicotine analogs may be more potent than nicotine – which is already highly addictive, can alter adolescent brain development and have long-term effects on youth’s attention, learning and memory.”
Traditional nicotine found in many vapes and pouches is extracted from tobacco leaves. 6-methyl nicotine, in contrast, is made entirely in the lab using chemicals.
The FDA said it was considering the use of such synthetic compounds from an “agency-wide perspective” and would use all of its resources to protect youth from products that may harm their health. As well as tobacco products, the FDA also regulates drugs, foods, cosmetics and more to ensure safety and efficacy.
“The FDA is a data-driven agency, and we’re in the process of reviewing the available data to inform potential actions in this space,” it said in response to Reuters’ questions.
Three academic researchers told the news agency that current studies of 6-methyl nicotine are too limited to draw definite conclusions on the health impact or to what degree it is addictive.
Imad Damaj, a professor in the Department of Pharmacology and Toxicology at Virginia Commonwealth University, said his research showed 6-methyl nicotine may be more potent than nicotine, but more extensive tests were needed to say what impact it has on humans.
The limitations of existing research included that some papers were industry funded, while others focused on the short-term impact on animals or cells and were insufficient to understand 6-methyl nicotine’s effects on human bodies, the researchers said.
Charlie’s Holdings calls the 6-methyl nicotine solution used in SPREE BAR Metatine. SPREE BAR’s website says Metatine “may have a toxicity profile similar to nicotine”.
SPREE BAR promises users 6,000 puffs from each device and offers fruity flavors including “blue razz ice” and “creamy melon”, according to its website.
The FDA has yet to approve any flavored vape using traditional nicotine for sale in the United States, saying companies have not been able to show that the health benefits they offer to smokers outweigh the known risks to young people, who may be more attracted by the flavors.
Charlie’s Holdings co-founder Ryan Stump told Reuters that the company only targets adults, adding that flavors played an important role in its mission to help smokers quit cigarettes.
Stump said Charlie’s Holdings respects and abides by laws in every market where it operates. He acknowledged that more research is needed on 6-methyl nicotine, adding that the company dilutes it in its products.
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Anes Saleh sells SPREE BAR in his vape shop in Denver, Colorado, called Sultan Smoke. He said he has some customers who only buy Spree Bar instead of a nicotine vape and he hasn’t had any negative feedback on the product.
“The only… protest I would hear about people not wanting to try this is that they don’t know what Metatine is or does,” he said.
Stump said that Charlie’s Holdings is working on new varieties of SPREE BAR and new products using 6-methyl nicotine. It will launch SPREE BAR internationally this year. He declined to say where.
The company buys the 6-methyl nicotine solution used in SPREE BAR from another U.S. firm, Novel Compounds, according to Novel Compounds’ founder Samuel Benaim.
Novel Compounds imports 6-methyl nicotine from overseas and alters it to make it easier for manufacturers like Charlie’s Holdings to use in their products. It sells this solution under the trade name imotine.
Tests commissioned by Novel Compounds have found 6-methyl nicotine to be no more harmful than nicotine, Benaim said. But he also said that more research was needed into the chemical.
Benaim added that Novel Compounds had received legal advice that its product is not classified as a tobacco product or drug in the United States. The company is committed to legal compliance, he said.
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Sven Jordt, a professor at Duke University, who has authored papers on products like SPREE BAR, said 6-methyl nicotine could me more addictive and toxic than its traditional cousin.
“Do we want to have such a chemical as a recreational product, available to anyone?,” he asked. “That’s really questionable.”
Neither Jordt nor Damaj – the professor at Virginia Commonwealth University – have received funding from tobacco or vape makers.
As well as the United States, Novel Compounds also sells its 6-methyl nicotine solution around the world, including in the United Kingdom, Indonesia, India and Japan.
Another company, Aroma King, sells 6-methyl nicotine in the United Kingdom in pouches, which users insert under the lip to get a buzz. The pouches are sold in cans emblazoned with graphics of gorillas in suits and sunglasses.
It said in a February blog post that its 6-methyl nicotine products were “less toxic”, “less harmful”, and “less addictive” than regular nicotine products.
In a statement to Reuters, Aroma King cited existing research, its own toxicology and other tests and its supplier, which classifies 6-methyl nicotine as less toxic under the European Union’s Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation.
Aroma King said 6-methyl nicotine was self-classified by its supplier. It declined to say who supplies it with the chemical.
Four Chinese companies hold patents in China related to the production of 6-methyl nicotine, including Zinwi Biotech, a company that makes the liquid used in vapes.
Zinwi Biotech confirmed it is researching 6-methyl nicotine but did not answer further questions, including on whether it has sold any 6-methyl nicotine so far. Reuters was unable to find contact details for the other firms.
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Collagen supplements have exploded in popularity, touted as everything from an anti-aging miracle to a muscle recovery booster.
But a sweeping new review conducted by U.K. researchers suggests that while collagen may help improve skin elasticity and ease arthritis pain, it does little for athletic performance or wrinkle reduction.
Researchers from Anglia Ruskin University analyzed 16 systematic reviews and 113 randomized controlled trials involving nearly 8,000 participants worldwide, which they say is the most extensive evaluation of collagen’s health effects to date.
The review found consistent evidence that collagen supplementation improves skin elasticity and hydration over time and provides significant relief from osteoarthritis-related joint pain and stiffness, according to findings published in Aesthetic Surgery Journal Open Forum.
A large U.K. review found that collagen supplements may improve skin elasticity and hydration over time. (iStock)
The researchers, however, did not find meaningful improvements in post-exercise muscle recovery, soreness or tendon mechanical properties (strength, springiness and stretch resistance).
“Collagen is not a cure-all, but it does have credible benefits when used consistently over time, particularly for skin and osteoarthritis,” co-author Lee Smith, professor of public health at Anglia Ruskin University, said in a statement.
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“Our findings show clear benefits in key areas of healthy aging, while also dispelling some of the myths surrounding its use,” Smith added.
Collagen, the most abundant protein in the body, supports skin, bones, tendons, cartilage and connective tissue, according to experts. Natural collagen production begins to drop in early adulthood and declines more sharply with age.
The study found that collagen supplements may help reduce joint pain and stiffness in people with osteoarthritis. (iStock)
The review found that long-term collagen supplementation was linked to improved skin firmness and hydration, but did not help skin roughness — a proxy for visible wrinkles.
Benefits appear to accumulate gradually, suggesting that collagen should not be viewed as an “anti-wrinkle ‘quick fix,’ but as a foundational dermal support for individuals seeking holistic skin maintenance,” the researchers said.
“If we define anti-aging as a product or technique designed to prevent the appearance of getting older, then I believe our findings do support this claim for some parameters,” Smith told the BBC. “For example, an improvement in skin tone and moisture is associated with a more youthful-looking appearance.”
Collagen supplementation was linked to reduced pain and stiffness in people with osteoarthritis, with stronger benefits seen over longer periods of use, and showed modest improvements in muscle mass and tendon structure that may support healthy aging.
Collagen did not significantly improve skin roughness, a marker of visible wrinkles. (iStock)
However, it did not show meaningful results when used as a fast-acting sports performance supplement, and evidence for benefits related to cholesterol, blood sugar, blood pressure and oral health was mixed or inconclusive.
Dr. Daniel Ghiyam, a California-based physician and longevity specialist, said the findings align with what he sees in clinical practice.
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“Collagen is a targeted support tool, not a foundation of health or performance,” Ghiyam, who was not involved in the study, told Fox News Digital. “When marketed that way, it makes sense. When marketed as a cure-all, it doesn’t hold up to the data.”
The authors noted that while many previous collagen studies have received financial support from the supplement industry, the current review did not receive industry funding.
Experts say collagen supplements may offer modest benefits for skin hydration and joint comfort, but they are not a cure-all. (iStock)
The team called for more high-quality clinical trials examining long-term outcomes, optimal dosages and differences between collagen sources, such as marine, bovine and plant-based alternatives.
Among its limitations, the review could not determine whether certain forms of collagen work better than others or what the optimal regimen should be.
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While the review included randomized controlled trials, the quality of the studies varied, with newer research generally showing stronger results.
Experts say more data and studies are needed to build on the findings. They also noted that diet plays a crucial role in skin health.
Collagen supplements, often sold as powders or pills, may improve skin elasticity and ease joint pain, experts say. (iStock)
Dr. Erum Ilyas, a Pennsylvania-based dermatologist and chair of dermatology at Drexel University College of Medicine, noted that the review analyzed previously published meta-analyses rather than generating new primary data.
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“At this time, I have not seen sufficiently strong independent evidence to routinely recommend collagen supplements to my patients,” Ilyas, who was not involved in the review, told Fox News Digital.
“Although some studies show modest improvements in markers such as hydration and elasticity, there remains limited independent, biopsy-confirmed evidence demonstrating sustained increases in dermal collagen content,” she added.
Fox News Digital has reached out to the researchers for comment.
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As colorectal cancer (CRC) is now the leading cause of cancer death in adults under 50, a new report reveals some surprising shifts in the incidence of the disease.
Although rates of CRC have been declining among seniors, those 65 and under are facing a rise in diagnoses, according to a report titled Colorectal Cancer Statistics, 2026, from the American Cancer Society.
Adults 65 and younger comprise nearly half (45%) of all new colorectal cancer cases — a significant increase from 27% in 1995, states the report, which was published in CA: A Cancer Journal for Clinicians.
The disease is rising fastest among adults 20 to 49 years old, at a rate of 3% per year.
Colorectal cancer is now the leading cause of cancer death in adults under 50. (iStock)
Among adults 50 and under, 75% of colorectal cancers are diagnosed at an advanced stage. Half of the diagnoses in that age range are made between the ages of 45 and 49. Although that age group is eligible to receive routine screenings, just 37% do so.
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The report also revealed that rectal cancer is on the rise, now accounting for about one-third (32%) of all CRC cases — an increase from 27% in the mid-2000s.
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“After decades of progress, the risk of dying from colorectal cancer is climbing in younger generations of men and women, confirming a real uptick in disease because of something we’re doing or some other exposure,” said Rebecca Siegel, senior scientific director, surveillance research at the American Cancer Society and lead author of the report, in a press release.
Among adults 50 and under, 75% of colorectal cancers are diagnosed at an advanced stage. Half of the diagnoses in that age range are made between the ages of 45 and 49. (iStock)
“We need to redouble research efforts to understand the cause, but also circumvent deaths through earlier detection by educating clinicians and the general public about symptoms and increasing screening in people 45-54 years.”
It is projected that 158,850 new cases of colorectal cancer will be diagnosed this year, and that the disease will cause 55,230 deaths, per the report.
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More than half of CRC cases can be linked to high-risk behaviors, the researchers said. Those include lack of nutrition, high alcohol consumption, smoking, lack of exercise and obesity.
“These findings further underscore that colorectal cancer is worsening among younger generations and highlight the immediate need for eligible adults to begin screening at the recommended age of 45,” said Dr. William Dahut, chief scientific officer at the American Cancer Society.
When the disease is caught at a local (early) stage, the five-year survival rate is 95%. (iStock)
“The report also shines a light on the crucial importance of continued funding for research to help discover new therapies to treat the disease and advance patient care.”
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When the disease is caught at a local (early) stage, the five-year survival rate is 95%, the report stated.
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A new study suggests that middle-aged men may be more vulnerable to faster biological aging, potentially linked to exposure to “forever chemicals.”
The research, published in the journal Frontiers in Aging, examined how perfluoroalkyl and polyfluoroalkyl substances, more commonly known as PFAS, could impact aging at the cellular level.
PFAS are synthetic chemicals commonly used in nonstick cookware, food packaging, water-resistant fabrics and other consumer products, the study noted.
Their chemical structure makes them highly resistant to breaking down, allowing them to accumulate in water, soil and the human body.
Chinese researchers analyzed blood samples from 326 adults enrolled in the U.S. National Health and Nutrition Examination Survey between 1999 and 2000.
A new study suggests that middle-aged men could face accelerated biological aging at the cellular level due to exposure to PFAS. (iStock)
The researchers measured levels of 11 PFAS compounds in participants’ blood and used DNA-based “epigenetic clocks” — tools that analyze chemical changes to DNA to estimate biological age — to determine how quickly their bodies were aging at the cellular level, the study stated.
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Two compounds, perfluorononanoic acid (PFNA) and perfluorooctanesulfonamide (PFOSA), were detected in 95% of participants.
Higher concentrations of those chemicals were associated with faster biological aging in men of certain age groups, but not in women.
“People should not panic.”
The compounds most strongly linked to accelerated aging were not the PFAS chemicals that typically receive the most public attention, the researchers noted.
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“The associations were strongest in adults aged 50 to 64, particularly in men,” Dr. Xiangwei Li, professor at Shanghai Jiao Tong University School of Medicine and the study’s corresponding author, told Fox News Digital.
“While this does not establish that PFAS cause aging, it suggests that these widely present ‘forever chemicals’ may be linked to molecular changes related to long-term health and aging.”
The study found that two of the compounds were detected in 95% of participants, and higher levels were linked to faster biological aging in men ages 50–64. (iStock)
Midlife may represent a more sensitive biological period, when the body becomes more vulnerable to age-related stressors, according to the researchers.
Lifestyle factors, such as smoking, may influence biological aging markers, potentially increasing vulnerability to environmental pollutants.
While Li said “people should not panic,” she does recommend looking for reasonable ways to reduce exposure.
That might mean checking local drinking water reports, using certified water filters designed to reduce PFAS, and limiting the use of stain- or grease-resistant products when alternatives are available.
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Meaningful reductions in PFAS exposure will likely depend on broader regulatory action and environmental cleanup efforts, Li added.
The researchers noted that midlife could be a particularly sensitive stage, when the body is more susceptible to stressors associated with aging. (iStock)
Study limitations
The researchers outlined several important limitations of the research, including that the findings show an association, but do not prove that PFAS directly causes accelerated aging.
“The study is cross-sectional, meaning exposure and aging markers were measured at the same time, so we cannot determine causality,” Li told Fox News Digital.
The study was also relatively small, limited to 326 adults age 50 or older, which means the findings may not apply to younger people or broader populations.
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Researchers measured PFAS levels using data collected between 1999 and 2000, and today’s exposure patterns may differ.
Li added that while PFAS is known to persist in the environment and the body, these results should be validated through larger, more recent studies that follow participants over time.
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