Feeling unwell as you step into 2026? If you’re hacking and sneezing, you’re certainly not the only one.
A concerning new flu variant, referred to as the “superflu,” is making its way through the United States, causing a notable rise in cases. According to the CDC, there have been 4.6 million influenza cases reported this season, with 49,000 hospitalizations and approximately 1,900 deaths.
New York has been hit particularly hard.
In the week ending December 27, the state recorded its highest number of flu-related hospitalizations in over 20 years of tracking this contagious disease.
“This flu season is proving to be more severe than usual, with nearly 1,000 additional hospital admissions within the past week compared to the week before,” stated state Health Commissioner Dr. James MacDonald in a recent press release.
The swift spread of influenza A, specifically subclade K, is mainly responsible for this increase. Experts point out that this variant has several mutations that help it bypass immunity gained from previous infections and vaccinations, making people more vulnerable to it.
Typical symptoms include fever, fatigue, body aches, chills, along with stuffy or runny noses, sore throats, and sometimes gastrointestinal issues like vomiting or diarrhea.
As people seek relief, there’s been a growing interest in an over-the-counter supplement called N-acetylcysteine (NAC). Proponents claim it can alleviate flu symptoms and possibly shorten recovery time.
So, is NAC really effective? It might help to first clarify what NAC actually is.
NAC is a supplement derived from cysteine, an amino acid found in various high-protein foods like beef, chicken, eggs, cheese, yogurt, and whole grains.
This amino acid is regarded as “conditionally essential,” meaning while the body can produce it from other amino acids, it may not always produce enough.
Having sufficient levels of cysteine and NAC is crucial, as they contribute to replenishing glutathione—one of the body’s most potent antioxidants.
Glutathione plays a role in neutralizing harmful free radicals that generate oxidative stress, which can damage cells and is linked to issues like arthritis, diabetes, heart disease, Alzheimer’s disease, cancer, and premature aging.
It also supports immune health, brain function, and the body’s detoxification processes.
In conventional medicine, NAC is already known for its applications.
The FDA has approved it as a remedy for acetaminophen poisoning, helping to prevent liver damage when given after an overdose.
NAC is also recognized for benefiting respiratory ailments like COPD, bronchitis, and cystic fibrosis by breaking down thick mucus, which aids in easier breathing.
In recent years, NAC has gained popularity as a dietary supplement. In 2022, the FDA stated they wouldn’t enforce regulations against companies selling it, citing strong consumer interest and its long history of safe use.
“I often suggest N-acetylcysteine (NAC) as a beneficial supplement,” shared general practitioner Dr. Naveed Asif.
“It promotes respiratory health by thinning mucus and enhancing lung function, especially during cold and flu season. Plus, NAC acts as a powerful antioxidant, which can strengthen the immune system and reduce oxidative stress, improving my overall health in winter,” he added.
There’s also some research that supports the popularity of NAC. In one study, participants received either a placebo or 600 milligrams of NAC twice daily for six months.
By the end of the trial, 79% of participants on the placebo developed flu symptoms, compared to just 25% in the NAC group. Those taking NAC reported milder symptoms and quicker recoveries.
Still, it’s important to note that NAC isn’t officially recommended as a standard treatment for influenza. Experts suggest it might be beneficial as an additional therapy, particularly for older adults and high-risk individuals, especially those dealing with excessive mucus.
For anyone already feeling unwell, antiviral medications like Tamiflu or Xofluza are recommended, particularly if started within the first two days of showing symptoms.
Getting enough rest and staying hydrated are also key components to supporting your immune system in fighting off infections.
And it’s worth mentioning that it’s not too late to get a flu shot. Even though this year’s vaccines aren’t a perfect match for the subclade K strain, they can still help prevent severe illness, hospitalization, and even death.
Above all, please consider staying home if you’re feeling sick. There’s quite enough going around in New York.
The week of December 20 saw more residents visiting emergency rooms with flu-like symptoms than any other week in the last decade.
That same week, the New York State Department of Health logged 71,123 positive influenza cases, marking the highest weekly total since tracking began in 2004.
