The surprising ways foods can change body odor, according to experts

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  Published in Food and Wine on Monday, November 10th 2025 at 7:46 GMT by Fox News

How What You Eat Shapes the Way You Smell: A Deep Dive into the Science Behind Body Odor

In a world where first impressions can hinge on a single breath, the age‑old question “Do my clothes smell bad?” is often accompanied by a more perplexing one: “Is my body odor a reflection of what I eat?” A recent Fox News feature titled “Surprising Ways Foods Can Change Body Odor, According to Experts” takes a close look at the foods that can intensify, alter, or even improve the scent that leaks from us each day. The article, which drew on interviews with dermatologists, nutritionists, and recent peer‑reviewed research, reveals that our dietary choices are more potent in sculpting body odor than we might imagine.

Garlic and Onions: The Classic Bad‑Breath Culprits

The story begins with the familiar suspects—garlic and onions. While these foods are culinary staples, they contain sulfur‑rich compounds like allicin and thiosulfinates. When these are broken down by the body, they’re released into the bloodstream and eventually exhaled through the lungs or expelled via sweat. Experts note that the odor is especially potent in people with a genetic predisposition to produce high levels of sulfides. The article cites a 2019 study published in the Journal of Cosmetic Dermatology that tracked the body odor of 40 participants after a garlic‑rich lunch; 85 % of those participants registered a measurable increase in the sulfur component of their sweat, a change that was most pronounced after 12 hours.

Spicy Foods and the Heat‑Sweat Connection

Next up is the spicy category—pepper, curry, and other heat‑laden dishes. The culprit here is capsaicin, a compound that triggers the body’s thermoregulatory system. When sweat glands work overtime to cool the body, they can also release certain volatile organic compounds that smell “funky.” Dermatologist Dr. Maya Patel, quoted in the piece, explains, “The more the body tries to cool itself, the more sweat is produced, and this sweat carries more odor‑producing bacteria.” A 2021 study in Food Chemistry found that participants who ate a hot pepper stew produced up to 40 % more of the compound isovaleric acid—a known contributor to body odor—than those on a bland diet.

Dairy, Red Meat, and Protein‑Rich Meals

High‑protein foods such as red meat and dairy are the third major culprit. Protein breakdown releases branched‑chain amino acids, which are further metabolized by gut bacteria into trimethylamine (TMA) and other malodorous compounds. Dr. Kevin O’Donnell, a gastroenterologist interviewed for the article, notes that individuals on a “high‑protein, low‑carbohydrate” diet are at a higher risk of developing a distinct, fishy body odor. He cites a 2018 study in Nutrients that found a direct correlation between the intake of whey protein and increased levels of TMA in breath samples.

The article also discusses how dairy’s high-fat content can thicken sweat and create a sticky environment that promotes bacterial growth. A 2020 review in The American Journal of Clinical Nutrition concluded that participants who consumed more than 2 cups of milk per day were 1.6 times more likely to report a noticeable body odor than those who drank fewer than ½ cup per day.

Sugar, Alcohol, and Processed Foods

Sugars and refined carbs can also be a cause. Excessive sugar in the bloodstream can lead to the formation of advanced glycation end products (AGEs) that are excreted through sweat. Meanwhile, alcohol dehydrates the skin, concentrating sweat and making odor more potent. Processed foods with high levels of additives and preservatives are another source of volatile organic compounds that can contribute to a “mushy” or “off” body scent. The article’s author referenced a 2017 article in Food Research International that linked consumption of high‑sugar, processed snacks with a measurable increase in the compound 3‑methyl‑2‑buten‑1‑ol, which has a “sweet” but unpleasant smell.

The Good Guys: Foods That Can Help

The piece also balances the negatives with the positive. Foods rich in antioxidants—berries, leafy greens, and citrus fruits—are shown to neutralize free radicals in sweat. Water, naturally, dilutes the concentration of odor‑producing molecules. Probiotic‑rich foods such as yogurt and kimchi help maintain a healthy gut flora, which in turn reduces the production of odorous by‑products. The article highlights a 2022 study from the Journal of Applied Microbiology that found a significant decrease in the production of isovaleric acid when participants added fermented foods to their diet.

Practical Tips From the Experts

1. Watch Your Garlic and Onion Intake
   - Dr. Patel recommends limiting these foods to one meal a week, especially before social or professional events.

2. Hydrate, Hydrate, Hydrate
   - Aiming for at least eight glasses of water per day can help flush out odor‑producing molecules.

3. Introduce Probiotics
   - Incorporating kefir, sauerkraut, or a probiotic supplement can help shift the gut bacteria profile toward less odorous by‑products.

4. Choose Lean Proteins
   - Opt for plant‑based proteins or lean poultry instead of red meat, particularly if you notice a “fishy” body scent.

5. Mind the Processed Foods
   - Reducing intake of high‑sugar, high‑fat snacks can have a noticeable effect on your overall scent.

6. Use Antioxidant‑Rich Foods
   - Add berries or citrus to your meals; their vitamin C content helps neutralize free radicals that contribute to body odor.

The Bottom Line

The Fox News article underscores that while genetics and hygiene play significant roles in body odor, diet is a powerful, often overlooked factor. From sulfurous garlic to the heat‑induced sweat from spicy foods, the foods we choose to nourish ourselves with have a direct line to the molecules that carry our scent. By making mindful dietary changes—such as moderating high‑protein meals, staying hydrated, and adding probiotic and antioxidant foods—individuals can take an active role in shaping how they smell and, consequently, how they are perceived in social and professional settings.

Links Followed for Additional Context
- “Foods That May Make You Smell Bad” (Fox News) – provides a broader look at the biochemical pathways of body odor.
- “How to Reduce Body Odor Naturally” (Fox News) – offers practical, non‑dietary tips such as proper deodorant use and skin hygiene.
- “The Effect of Diet on Body Odors” (Journal of Cosmetic Dermatology, 2019) – details the empirical evidence behind sulfur‑related body odor changes.
- “High‑Protein, Low‑Carbohydrate Diets and Body Odor” (Nutrients, 2018) – examines the link between amino acid metabolism and odor production.
- “Advanced Glycation End Products in Sweat” (Food Research International, 2017) – discusses how refined sugars can alter sweat composition.

By weaving together expert opinions, scientific research, and actionable advice, the feature serves as a comprehensive guide for anyone looking to understand—and potentially control—the scent that follows them throughout the day.