Plain soap outlasted 19 banned germ killers, and when you wash matters more

Key takeaways

• In a USDA test-kitchen study of more than 1,000 home cooks, people skipped handwashing or did it poorly about 95% of the time while making a meal¹.
• Across 30 community studies, better hand hygiene cut stomach and intestinal illness by 31% and respiratory illness by 21%⁴.
• In 2016 the FDA barred 19 antibacterial ingredients, including triclosan, from consumer soaps because makers never showed they beat plain soap and water²³.
• Hand sanitizer with at least 60% alcohol is a backup, but CDC says soap works better against germs such as norovirus and C. diff, and sanitizer may leave pesticides or lead behind⁸.
• If a child swallows hand sanitizer, call Poison Control at 1-800-222-1222, and call 911 if the child has trouble breathing or becomes unconscious, the FDA advises¹⁰.

Over three years, U.S. Department of Agriculture researchers watched more than 1,000 people cook in test kitchens¹. Some made turkey burgers with a side salad. Others cooked chicken thighs or frozen stuffed chicken breasts¹.

The cooks knew they were being watched. Even so, about 95% of the time, they either didn’t try to wash their hands before and during cooking or didn’t wash well enough¹. The most common slip was skipping a full 20-second scrub with soap¹.

That gap matters because the habit works. Handwashing has been tested in dozens of studies and trials⁴⁵. It does its best work at a few specific moments, like the one right after you handle raw chicken.

Yet for years, store shelves sold the idea that ordinary soap wasn’t enough. In 2016, the Food and Drug Administration ended that chapter for consumer soaps².

This guide covers what handwashing prevents and how much, when soap beats sanitizer, why antibacterial soap lost its place and “targeted hygiene,” an approach that protects you from infection without trying to sterilize your life.

Handwashing stops more stomach bugs than colds

A 2008 analysis in the American Journal of Public Health, led by Allison Aiello, pooled 30 studies of hand hygiene in everyday community settings⁴. Better hand hygiene cut gastrointestinal illness by 31% and respiratory illness by 21%⁴. The authors called the stomach benefit clear and the respiratory benefit smaller⁴.

A 2023 Cochrane review, which pools randomized trials, adds absolute numbers for the respiratory side⁵. In nine trials with 52,105 people, hand hygiene programs cut acute respiratory infections by 14%⁵. About 327 of every 1,000 people in the programs caught one, compared with 380 of every 1,000 without them⁵. By our math, that’s about 53 fewer infections per 1,000 people.

The same review found no clear effect on flu confirmed by a lab test, and its certainty there was low⁵. Hands are only one route for respiratory germs. Aiello’s team called for more study of airborne spread⁴, which our companion article on preventing respiratory infections covers.

Stomach germs depend more on hands. CDC notes that one gram of human feces, about the weight of a paper clip, can hold a trillion germs⁶. On its handwashing fact page, CDC says teaching people to wash cuts diarrhea by 23% to 40%, and colds and similar illnesses by 16% to 21%⁶. The page lists dozens of studies but doesn’t tie each figure to one of them.

The payoff may be largest for people with fragile defenses. The same CDC page puts the drop in diarrheal illness at 58% for people with weakened immune systems⁶. A later article in this series covers how families can protect someone at higher risk.

The FDA found antibacterial soap no better than plain soap

On September 6, 2016, the FDA published a final rule on consumer antiseptic washes³. It barred 19 active ingredients, including triclosan and triclocarban, from over-the-counter hand soaps, bar soaps and body washes². Makers had one year to comply³.

The reason was a lack of proof. Companies hadn’t shown that these ingredients were safe for long-term daily use, or that they prevented illness better than plain soap and water²³.

The FDA also flagged worries about germ resistance. It pointed to animal studies suggesting triclosan and triclocarban might affect the thyroid and reproductive systems, and it asked for data³. Those were open questions, not proven harms in people.

Aiello’s team had reached a similar verdict in 2008. Antibacterial soap added little benefit over plain soap in community settings⁴.

The rule has limits. Three ingredients, benzalkonium chloride, benzethonium chloride and chloroxylenol, were set aside while makers gathered more data². As of the FDA’s December 2024 consumer update, they were still allowed and still under review, and we found no later FDA decision on them². Hand sanitizers, hand wipes and antiseptics used in hospitals and nursing homes aren’t covered².

To spot an antibacterial soap, look for the word “antibacterial,” one of those three ingredients or a Drug Facts label². If you prefer fewer additives, this is a case where the simpler product is also the one the evidence supports.

Soap first, and sanitizer when there’s no sink

CDC calls soap and water the best choice in most situations⁸. Washing lifts every type of germ off your skin and sends it down the drain; sanitizer only kills certain ones where they sit⁸.

Wet your hands with clean running water, warm or cold, then lather⁷. Scrub the backs, between your fingers and under your nails for at least 20 seconds, then rinse and dry with a clean towel or the air⁷. Bar soap and liquid soap both work⁷.

When there’s no sink, CDC advises sanitizer with at least 60% alcohol⁸. Use enough to cover both hands and rub until dry, about 20 seconds, without wiping it off⁸.

Sanitizer has blind spots. It may not work well on hands that look dirty or greasy, and soap does better against norovirus, Cryptosporidium and C. diff⁸. Nor can you count on sanitizer to clear pesticide residue or lead from your skin⁸. CDC advises soap and water after gardening, fishing or camping, when hands are often dirty⁸.

Alcohol carries its own cautions. In 2021 the FDA warned that sanitizer vapors can cause headache, nausea and dizziness, especially in closed spaces such as a car, so crack a window until your hands dry¹⁰. Sanitizer is flammable, so let it dry before you go near a flame¹⁰.

The FDA also keeps a “do-not-use” list of sanitizers found to contain harmful ingredients¹⁰. Some products were contaminated with methanol, which can cause blindness and death, the National Capital Poison Center notes¹¹.

Targeted hygiene puts your effort where germs spread

Many people picture hygiene as keeping every surface spotless. The International Scientific Forum on Home Hygiene (IFH), a nonprofit group of hygiene scientists, argues for something narrower¹².

Its approach, called targeted hygiene, focuses effort on the times and places where harmful germs are most likely to spread¹². IFH names nine such moments, including handling food, using the toilet, caring for pets and caring for a sick family member¹². It suggests touching your eyes, nose or mouth could count as a tenth¹².

IFH also ranks household items by risk. Hands, surfaces that hands touch often, food-contact surfaces and cleaning cloths and sponges sit at the top¹². Floors, walls and furniture sit at the bottom, even when they look dirty¹².

Public beliefs often run the other way. In a 2024 online experiment run for IFH by the Behavioural Insights Team, 64% of English adults in the comparison group said hygiene should be practiced “as often as you can”¹³. Only 22% picked “at key moments,” and 77% believed germs spread by breeding on dirty surfaces¹³.

After a short video on targeted hygiene, about seven minutes long, 34% of viewers chose key moments¹³. The study measured beliefs and plans, not what people did at home.

What about the “hygiene hypothesis“? IFH says there’s no good evidence that cleanliness itself robbed people of helpful microbes, and that any role for hygiene is likely small next to other lifestyle changes¹². Our article on the farm effect explains what that research does and doesn’t show.

A note on the source: IFH describes itself as a nonprofit charity. The reports we read didn’t name its funders, and one of its polls was run with AISE, the soap and detergent industry’s international trade group¹².

Your kitchen is where the stakes run highest

About 1 in 6 Americans gets sick from food poisoning each year, and about 128,000 are hospitalized, according to FoodSafety.gov¹⁴. The federal plan has four steps: clean, separate, cook and chill¹⁴.

A few habits matter most at the cutting board:

• Wash your hands for 20 seconds before, during and after handling raw meat, poultry, seafood or eggs¹¹⁴.
• Don’t wash raw meat, poultry, seafood or eggs¹⁴.
• Keep one cutting board for produce and another for raw meat, poultry or seafood¹⁴.
• Wash boards, dishes, utensils and counters with hot, soapy water after raw meat touches them¹⁴.
• Refrigerate perishable food within 2 hours, or within 1 hour if it’s above 90°F¹⁴.

Cloths and sponges deserve a closer look. IFH ranks them among the riskiest items in a home¹². Yet in a 2020 European poll IFH cited, only 31% of people who used disinfectants used them on cleaning cloths, while 62% said they always or often disinfected kitchen and bathroom floors, which IFH ranks as low risk¹².

For the products themselves, see our articles on cleaning versus disinfecting and on reading cleaner labels. For fridge temperatures and leftovers, see “Date labels mostly track quality, while a fridge thermometer tracks safety.”

The targeted hygiene checklist

This checklist is ours, built from CDC, USDA and IFH advice. The ratings use our four-level scale and reflect how well each step has been tested in people.

Moment	What to do	How much it helps	Rating
After the toilet or a diaper change	Soap and water, with a 20-second scrub7	Stomach illness fell 31% with better hand hygiene4	Strong evidence
Handling raw meat, poultry or eggs	Wash before, during and after; use separate boards114	The step USDA’s test cooks missed most1	Strong evidence for handwashing in general4
Caring for someone with vomiting or diarrhea	Soap and water before and after, not sanitizer18	Soap beats sanitizer against norovirus, CDC says8	Strong evidence for handwashing in general4
After coughing, sneezing or blowing your nose	Wash afterward, or use sanitizer if there’s no sink78	About 53 fewer respiratory infections per 1,000 people, by our math5	Strong evidence of a modest effect
Out in public, with no sink nearby	Sanitizer with at least 60% alcohol8	Kills many germs but misses some8	Promising but early
After touching pets, pet food or litter	Soap and water7	Not measured on its own in the studies we read	Not enough evidence
After gardening or yard work	Soap, not sanitizer8	Sanitizer may leave pesticides or lead behind8	Not enough evidence for infection
Cloths and sponges	Wash or replace often (our suggestion)	IFH ranks them high-risk12	Not enough evidence for illness outcomes
Floors, walls and furniture	Ordinary cleaning (our suggestion)	IFH ranks them low-risk12	Not enough evidence that disinfecting helps

How strong is the evidence?

Claim	Rating	Why
Handwashing with soap cuts stomach infections	Strong evidence	31% fewer across 30 community studies4
Hand hygiene modestly cuts colds and similar infections	Strong evidence	14% fewer in nine trials (moderate certainty), in line with 21% in an earlier analysis45
Hand hygiene prevents lab-confirmed flu	Not enough evidence	No clear effect, low certainty5
Antibacterial soap protects better than plain soap	Evidence says no, or unsafe	Makers never showed added benefit; studies found little24
Sanitizer replaces soap for greasy hands or norovirus	Evidence says no, or unsafe	CDC says soap works better in both cases8
A “key moments” message changes what people believe	Promising but early	One online experiment that measured beliefs, not behavior13

Clean hands without cracked skin

Frequent washing can dry skin until it flakes, itches, cracks and bleeds, the American Academy of Dermatology (AAD) says¹⁵. That matters for more than comfort, because germs slip more easily through cracked skin¹⁵.

The AAD’s answer isn’t to wash less. It’s to wash smarter¹⁵:

• Use lukewarm water, and try different soaps, since some dry skin more than others.
• Pat your hands almost dry, then apply cream or ointment while the skin is still damp.
• Choose products with mineral oil or petrolatum that come in a tube or tub, not a pump, and are labeled fragrance-free and dye-free.
• After sanitizer dries, add hand cream.

Sanitizer can be very drying, the AAD notes¹⁵. Still, in one trial in the Cochrane review, skin reactions were about as common with sanitizer as without it, 10.4% versus 10.3%, though Cochrane rated that evidence very uncertain⁵.

See a dermatologist if dryness continues despite these steps¹⁵. Some people need a prescription cream, and eczema needs its own treatment¹⁵.

Soap, water and a good balm are about as traditional as hygiene gets. Targeted hygiene fits a natural-health instinct, too: protect yourself where it counts and leave the rest of your microbial world alone.

If cleaning starts to feel driven by fear rather than choice, “Fear of every slip, more than high standards, is usually the problem” looks at that pattern. Our article on how habits form looks at how hospital staff built handwashing habits.

Questions readers ask

The bottom line

Handwashing with plain soap has decades of research behind it. It cuts stomach bugs clearly and colds modestly, and antibacterial additives never proved they added anything. Sanitizer is a useful backup with real blind spots, and a real poisoning risk for small children.

You don’t need a sterile home. Wash well after the toilet, around raw meat, when someone is sick and before you eat, keep cloths and cutting boards clean and let the floors be ordinary. That’s targeted hygiene: effort where germs spread, and nowhere they don’t.

Related reading

• Amish house dust protected mice from asthma, and the lesson isn’t to keep a dirtier home
• The signal word on a cleaner tells you more than “natural” does
• Cleaning, sanitizing and disinfecting are three different jobs
• A habit is a shortcut your setting triggers, and this is how one forms
• One CDC plan now covers colds, flu and COVID-19, with prevention in layers

Sources

1. U.S. Department of Agriculture, Food Safety and Inspection Service. “Handwashing for Food Safety.” FSIS, 2021. fsis.usda.gov
2. U.S. Food and Drug Administration. “Skip the Antibacterial Soap; Use Plain Soap and Water.” FDA Consumer Update, content current as of December 12, 2024. fda.gov
3. U.S. Food and Drug Administration. “Consumer Antiseptic Wash Final Rule Questions and Answers.” FDA, July 2017. fda.gov
4. Aiello AE, Coulborn RM, Perez V, Larson EL. “Effect of Hand Hygiene on Infectious Disease Risk in the Community Setting: A Meta-Analysis.” American Journal of Public Health, 2008;98(8):1372-1381 (abstract via RePEc). ideas.repec.org
5. Jefferson T, Dooley L, Ferroni E, et al. “Physical Interventions to Interrupt or Reduce the Spread of Respiratory Viruses.” Cochrane Database of Systematic Reviews, 2023, Issue 1, CD006207.pub6 (PubMed Central full text). pmc.ncbi.nlm.nih.gov
6. Centers for Disease Control and Prevention. “Handwashing Facts.” CDC, last reviewed April 17, 2024. cdc.gov
7. Centers for Disease Control and Prevention. “Handwashing at Home, at Play, and Out and About” (CS 280522A). CDC, undated. stacks.cdc.gov
8. Centers for Disease Control and Prevention. “Hand Sanitizer Guidelines and Recommendations.” CDC, last reviewed March 12, 2024. cdc.gov
9. Santos C, Kieszak S, Wang A, Law R, Schier J, Wolkin A. “Reported Adverse Health Effects in Children from Ingestion of Alcohol-Based Hand Sanitizers — United States, 2011–2014.” Morbidity and Mortality Weekly Report, 2017;66(8):223-226. cdc.gov
10. U.S. Food and Drug Administration. “FDA Warns That Vapors From Alcohol-Based Hand Sanitizers Can Have Side Effects.” Drug Safety Communication, June 16, 2021. fda.gov
11. National Capital Poison Center. “Hand Sanitizer: What’s the Real Story?” Poison.org, accessed October 2026. poison.org
12. International Scientific Forum on Home Hygiene. “Developing and Promoting Hygiene in Home and Everyday Life to Meet 21st Century Needs.” IFH white paper, July 2021. ifh-homehygiene.org
13. Bloomfield SF, Ackerley LM. “Evaluation of the Impact of a Targeted Hygiene Intervention on Public Hygiene Understanding and Behaviour” (research by the Behavioural Insights Team). IFH report, March 2025. ifh-homehygiene.org
14. FoodSafety.gov (U.S. Department of Health and Human Services). “4 Steps to Food Safety.” Last reviewed September 18, 2023. foodsafety.gov
15. American Academy of Dermatology. “Dry Skin Relief From Handwashing.” AAD, last updated December 18, 2024. aad.org