Is Sharing a Bar of Soap Really That Unhygienic?

You forgot your bar of soap during an overnight stay, or maybe you and your partner regularly share one. Is it harmless, or are you inviting a germ party into your shower routine?

Good news: Sharing a bar of soap is generally not as gross as it might seem. But before you grab someone else’s Dove, there are a few things you should know to ensure it stays a clean habit.

What Happens When You Share Soap?

Despite its purpose of cleaning, bar soap isn't necessarily self-cleaning. Research has shown that bacteria can linger on its surface after use:

• A small study from the April-June 2006 issue of the ​Indian Journal of Dental Research​ found that bar soaps harbored two to five different types of bacteria.

• More recently, a July 2015 study in the ​American Journal of Infection Control​ found that 62 percent of bar soaps in a hospital setting were contaminated with bacteria, compared to just 3 percent of liquid soaps.

So, does that mean sharing soap spreads germs? Potentially, yes if the soap carries bacteria like E. coli, salmonella, or even staph. These germs could transfer from the bar to your skin, especially if you have open cuts or scratches.

Why Sharing Soap at Home Is Safer

The key difference between sharing soap at home and, say, in a public restroom, is who you’re sharing it with. At home, you’re likely sharing with people you know, like family members or your partner, who presumably have similar hygiene habits.

Public restrooms avoid bar soaps for a reason they’re high-traffic areas with a mix of people and germs. That’s why liquid soap dispensers are the go-to in these settings.

Still, even at home, the way soap is handled makes a big difference in whether it’s safe to share.

How to Share Soap Safely

If you need to share soap, follow these simple habits to minimize any germ risks:

1. Rinse the Soap

After using the soap, rinse it off under running water to wash away any lingering dirt or bacteria. Do the same before using it on your own skin, especially if someone else has used it recently.

2. Lather Thoroughly

Make sure to lather for at least 20 to 30 seconds. "Bacteria like to stick to soap bubbles," says Kelly Reynolds, PhD, professor of public health and environmental science at The University of Arizona. Lathering ensures germs are lifted and rinsed away.

3. Keep the Soap Dry

Damp environments are a breeding ground for bacteria. Store the soap on a draining dish that allows it to dry completely between uses. As the bar dries, bacteria levels naturally decrease, lowering the risk of transfer.

Alternatives to Sharing Soap

If you’re not entirely comfortable sharing a bar of soap, here are some other options to consider:

• Liquid Body Wash or Soap: These are more hygienic options, as the soap is dispensed without coming into contact with your skin.

• Individual Bars: If you live with roommates or kids, providing each person their own bar of soap can eliminate concerns about hygiene.

• Emergency Sharing: If sharing a bar of soap is unavoidable, just follow the tips above to rinse, lather, and store the soap properly.

The Importance of Hand-Washing

When it comes to hand hygiene, it’s important to remember that the act of washing your hands matters more than the type of soap you use. According to the Centers for Disease Control and Prevention (CDC), lathering with soap for 20 seconds and rinsing thoroughly is one of the best defenses against germs.

"The most important thing here is washing your hands," Dr. Reynolds says. "Don’t worry too much about the soap itself."

So, How Bad Is It Really to Share a Bar of Soap?

It’s not bad as long as you take a few precautions. By rinsing the soap before and after use, lathering up thoroughly, and storing the bar properly to let it dry, you can safely share soap without spreading germs.

That said, if you’re still uneasy, consider switching to liquid soap or assigning everyone in your household their own bar. It’s a simple step to ensure everyone feels clean and comfortable.

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