Bar Soap vs Body Wash: Which Is More Sustainable for Your Daily Shower?

Quick Answer

Bar soap is generally more sustainable than body wash because it uses less packaging, lasts longer, and often contains fewer synthetic ingredients. For a zero waste shower, choose plastic-free bar soap, and complement it with solid shampoo and conditioner bars to eliminate plastic bottles entirely.

When you step into the shower, the choice between bar soap and body wash seems trivial. But for anyone aiming to reduce plastic waste, the decision carries significant weight. Body wash typically comes in plastic bottles that end up in landfills, while bar soap offers a package-free alternative. Yet, the comparison isn't just about packaging—ingredients, water usage, and skin impact all play a role.

In this article, we'll break down the sustainability of bar soap versus body wash, examine the hidden costs of each, and help you decide which fits your zero waste goals. We'll also highlight some plastic-free alternatives from EcoRoots that make the switch easier.

Packaging and Plastic Waste

The most obvious difference is packaging. Body wash is almost always sold in plastic bottles, often with pumps or caps that are difficult to recycle. According to a study, over 700 million plastic laundry jugs are dumped into landfills annually in North America—and body wash bottles contribute similarly to plastic pollution. Even if you recycle, the process consumes energy and the plastic degrades, limiting its reuse.

Bar soap, on the other hand, typically comes in a paper wrapper or cardboard box, which is easily recyclable or compostable. Many zero waste brands, including EcoRoots, offer completely package-free soaps. This eliminates the plastic problem at the source. By choosing bar soap, you avoid the need for recycling altogether, which is the most effective way to reduce waste.

• Choose bar soap wrapped in paper or cardboard, or completely naked.
• If you prefer body wash, look for refillable glass or aluminum containers.

Ingredients and Skin Health

Body washes often contain high water content, which means they require preservatives and synthetic surfactants to maintain shelf life. These can strip the skin of natural oils, leading to dryness. Bar soaps, especially those made with glycerin or natural oils, tend to be more nourishing. They often have fewer ingredients and no need for preservatives if they are properly cured.

For example, solid shampoo and conditioner bars follow the same principle. They are concentrated, so you use less product per wash, and they are free from the water that dilutes liquid formulas. This concentration also means they last longer, providing more value per dollar.

• Check ingredient lists: bar soaps often have simpler, more natural formulas.
• Solid bars are great for sensitive skin as they contain fewer synthetic additives.

Water Usage and Carbon Footprint

Bar soap requires less water during manufacturing because it doesn't contain water as a primary ingredient. Body wash is up to 80% water, which means shipping heavy, water-filled bottles increases transportation emissions. Bar soap is lighter and more compact, reducing its carbon footprint.

Additionally, using bar soap in the shower is more efficient: you lather it directly on your body or a washcloth, whereas body wash often requires a loofah or pouf, which can harbor bacteria and need frequent replacement. This adds to waste and resource consumption.

• Bar soap is lighter, reducing shipping emissions.
• Use a washcloth or your hands with bar soap to avoid plastic loofahs.

Cost and Longevity

At first glance, body wash might seem cheaper, but bar soap typically lasts longer. A high-quality bar soap can last 2-4 weeks with daily use, while a bottle of body wash might last the same time but contains more water. When you compare cost per wash, bar soap often wins.

Solid shampoo and conditioner bars are a perfect example. A single bar can last around 50+ washes, making them a cost-effective alternative to liquid shampoo and conditioner. This longevity also means fewer purchases and less packaging waste over time.

• Calculate cost per use: bar soap often provides more washes per dollar.
• Solid bars are concentrated, so a little goes a long way.

Trade-offs to Consider

• Packaging: Bar soap typically has no plastic packaging, while body wash almost always comes in plastic bottles. However, some body washes offer refillable options. Choose bar soap for a zero waste shower.
• Ingredients: Bar soap often has simpler, natural ingredients, while body wash may contain more water and synthetic additives. However, some bar soaps use palm oil, which has environmental concerns. Look for bars with sustainable oils like coconut or shea butter.
• Convenience: Body wash is easy to dispense and lather, while bar soap requires a dish to keep it dry and can be less hygienic if shared. However, bar soap is travel-friendly and doesn't leak. Use a well-draining soap dish to extend bar life.

Plastic-Free Alternatives at EcoRoots

• Lilac Flowers - Zero Waste Shampoo Bar: Handmade of coconut oil and cocoa butter-based, this vegan shampoo bar will leave your hair clean and nourished without stripping away your natural oils or hair color. Our plastic-free shampoo bar will last around 50+ washes. Switching to a shampoo bar reduces plastic bottle waste and provides a long-lasting, nourishing clean for your hair.
• Lilac Flowers - Zero Waste Conditioner Bar: This vegan conditioner bar is handmade of coconut oil and cocoa butter-based, leaving hair clean and nourished without stripping natural oils. It is unisex and plastic-free. Pairing a conditioner bar with a shampoo bar completes your zero waste hair care routine, eliminating plastic bottles and adding moisture without heavy chemicals.
• Zero Waste Laundry Detergent: Ultra-concentrated, lightweight, hypoallergenic, and super easy to use, our laundry detergent strips pack a ton of cleaning power into a tiny, pre-measured strip of detergent. Even your laundry can go plastic-free with concentrated strips, reducing the 700 million plastic jugs discarded annually.

Which Should You Choose?

Bar soap is best for

• Individuals aiming to minimize plastic waste and packaging.
• Those with sensitive skin who prefer simple, natural ingredients.
• Budget-conscious shoppers who want a long-lasting, cost-effective option.

Body wash might be better for

• People who prefer the convenience of a pump bottle and dislike handling a wet bar.
• Those who share a shower and want to avoid the potential mess of a bar soap dish.

When weighing bar soap vs body wash, the sustainable choice is clear: bar soap wins on packaging, ingredients, and longevity. By switching to plastic-free bar soap, and complementing it with solid shampoo and conditioner bars, you can drastically reduce your bathroom waste. Explore EcoRoots' range of zero waste personal care products to make the transition seamless and enjoyable.