How to Stop Body Odor: 7 Evidence-Based Approaches

If you're looking for how to stop body odor naturally, the honest answer is that there is no single fix — but there is a hierarchy of approaches that work, ranked by how much of the problem each one solves. Most people only try the first one or two, get partial results, and assume the problem is just genetic. The truth is that body odor responds to a stack of small changes more than any single intervention. Here are the seven approaches that have actual evidence behind them, ranked roughly by effectiveness for the average adult.

1. Hydrate consistently

This is the most under-appreciated body-odor intervention. Concentrated sweat smells stronger because each drop carries a higher dose of the odor-producing compounds your body is excreting. Drinking water consistently across the day — not just chugging a big glass at noon — dilutes those compounds and reduces sweat odor measurably within 48 hours.

Aim for half your body weight in pounds, in ounces of water. Spread it across the day. Coffee and tea count, but do not replace plain water. Alcohol dehydrates and meaningfully worsens sweat odor for 24-48 hours after.

2. Adjust your diet

Sulphur-rich foods produce sulphur-containing sweat compounds. Garlic, onions, cruciferous vegetables (broccoli, cauliflower, kale, brussels sprouts), eggs, and red meat are the primary contributors. None of these foods is bad — they are healthy in most contexts — but if you eat them daily and have noticeable body odor, eating less of them temporarily is the most direct test of whether diet is the lever.

Alcohol is in its own category. Beyond dehydration, alcohol metabolises into acetaldehyde, which is excreted through sweat with a distinctive sweet-stale smell. Reducing alcohol — even by half — produces a noticeable change in body odor within a week.

3. Support your gut

Your gut microbiome produces metabolites that end up in your sweat. A poorly-supported gut produces more odor-causing compounds; a well-supported gut produces fewer. Three things support gut health more than anything else:

• Fibre — 25-35g per day from whole-food sources, not just supplements.
• Fermented foods — kimchi, sauerkraut, kefir, plain yogurt, miso. A small daily portion goes a long way.
• Variety — eat 30+ different plant species per week. The diversity of your diet drives the diversity of your gut microbiome.

4. Wash with antibacterial soap (sometimes)

Body odor is produced when sweat meets bacteria on your skin. Reducing the bacterial load can reduce odor. But — and this is important — daily antibacterial-soap use can backfire by stripping the protective skin-microbiome bacteria and allowing odor-producing strains to dominate. The middle path is to use a gentle antibacterial soap on high-odor areas (underarms, feet, groin) two to three times a week, and a regular fragrance-free soap the rest of the time.

5. Wear breathable fabrics

Synthetic fabrics — polyester, nylon, acrylic — trap sweat against your skin and create the warm, moist environment odor-producing bacteria love. Cotton, linen, merino wool, and bamboo all breathe better and produce less odor. Merino wool in particular has natural antibacterial properties; it can be worn for days without producing the kind of body odor a polyester shirt produces in hours.

Pay particular attention to socks (cotton or merino, not polyester) and underwear (cotton). Both are high-odor areas where fabric choice matters disproportionately.

6. Use a topical deodorant — but pick a clean one

If you do use topical deodorant, the brand and formula matter. Aluminum-based antiperspirants block sweat glands rather than addressing odor. Modern aluminum-free deodorants — particularly ones built around magnesium hydroxide or coconut oil — neutralise odor without blocking sweat. They're not as long-lasting as aluminum, but they're a meaningful upgrade for daily use.

7. Try an internal deodorant

Internal deodorants — chlorophyll-based supplements — work by neutralising odor-producing compounds inside the body before they reach your skin. The category has 70 years of clinical research behind it, primarily for medical use, and is increasingly popular as a daily supplement for full-body freshness. Unlike topical deodorant, an internal deodorant works on every part of your body — underarms, feet, breath, intimate areas, skin folds — without aluminum, parabens, or constant reapplication.

This is the most decisive intervention on the list for people who have tried the first six and are still frustrated. It takes seven to twenty-one days for full effect, so it is not an instant fix, but the effect compounds and many users find they can stop using topical deodorant entirely after three weeks of daily use.

How to stack these

Most people get the best results from stacking three or four of these approaches at once. A reasonable starting protocol is: hydrate consistently, reduce alcohol and high-sulphur foods for two weeks, switch to breathable fabrics for high-sweat days, use a clean topical deodorant, and start an internal deodorant supplement. Run that stack for three weeks and most people see a meaningful change. If you still aren't satisfied after three weeks of consistent effort, it's worth a conversation with your doctor — sometimes the cause is medical.

These statements have not been evaluated by the Food and Drug Administration. This article is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.