Devrom: The Internal Deodorant That Made It Into Mary Roach's Gulp

Let's be honest about the topic nobody wants to discuss out loud: gas odor. It's unpredictable, it's embarrassing, and it can be genuinely isolating — on a plane, in an elevator, at work, on a date. If you've ever skipped a social event because of it, you already know the stakes.

Here's what most people don't know: there's a real, FDA-approved answer that has existed for over half a century. It's called Devrom, it's classified as an "internal deodorant," and it works from the inside out — no pads, no special underwear, no masking sprays. It even caught the attention of one of America's best-known science writers, who put it in a bestselling book.

What Is Devrom, Exactly?

Devrom is an over-the-counter medication whose active ingredient is 200 mg of bismuth subgallate, available as a chewable tablet or a capsule. It's made in the USA and has been trusted for more than 50 years. Unlike charcoal-lined underwear pads or external deodorizers, Devrom is an internal deodorant — you take it, and it deodorizes stool and flatulence from within. It's also clinically proven and FDA approved.

Memorial Sloan Kettering Cancer Center's patient education materials list bismuth subgallate (brand name: Devrom) as a medication used to help gas and stools smell better. It's simple to take: with or without food, and chewable tablets should be chewed well before swallowing. One harmless side effect to know about in advance: bismuth can temporarily darken the tongue and stool, which is normal, harmless and temporary.

The Science Behind It

The most-cited research on flatus odor belongs to Dr. Michael Levitt of the VA Medical Center in Minneapolis, who authored dozens of papers on the subject. In her book Gulp: Adventures on the Alimentary Canal, science writer Mary Roach recounts his findings — and they're striking. As Roach reported in her excerpt on Salon, Levitt's testing found that bismuth — the family of compounds that includes bismuth subgallate, Devrom's active ingredient — "reduces 100 percent of sulfur gas odor."

That's the key mechanism: gas odor comes largely from sulfur compounds, and bismuth subgallate binds them up. On NPR's Fresh Air, Roach told Terry Gross about Devrom directly: "It's an internal deodorant... it binds up the sulfur compounds and it reduces the odor."

How a Bestselling Book Put Devrom in the Spotlight

Devrom doesn't advertise the way most consumer products do. In her Salon excerpt, Roach explains why: mainstream magazines have repeatedly refused to run Devrom's ads, objecting to phrases as mild as "smelly flatulence." One publication suggested rewriting the ad to claim the product "eliminates intestinal gas" — which isn't what Devrom does at all. Devrom addresses odor, not gas volume.

The result is a strange kind of fame. Millions have heard of Devrom through Gulp and Roach's Fresh Air interview — through science journalism rather than advertising. As Roach observed, most Devrom customers are people with extenuating digestive circumstances: bariatric surgery patients, people with IBS, and people living with an ostomy pouch. For them, this isn't a punchline — it's a quality-of-life product.

Who Devrom Is Really For

Everyone has gas. If you've had gastric bypass or another bariatric procedure, you may already know that changes in digestion can bring odor problems along for the ride. The same goes for people with irritable bowel syndrome, fecal incontinence, or an ostomy. One customer testimonial on Devrom's site describes finding relief after open gastric bypass surgery; another describes using it alongside management of IBS and fecal incontinence.

What these situations share is that the odor isn't a matter of diet or willpower — it's physiology. And that's exactly the gap an internal deodorant fills. Many customers, Roach noted, have their first bottle quietly purchased for them by a spouse or left by a coworker — the taboo is that strong. If you're reading this on behalf of someone you love, you're in good company.

Try Devrom Today

Gas odor is a medical fact of life for millions of people — gassy people, ostomates, bariatric patients, IBS sufferers — and pretending otherwise hasn't made it easier to live with. Devrom offers something different: an FDA-approved, over-the-counter internal deodorant with more than 50 years of history and science-backed bismuth chemistry.

Visit Devrom.com to order chewable tablets or capsules, or call 1-800-453-8898 to talk to a real person about whether Devrom is right for you.