Dr. Bronner's Castil

Castile soap is a plant-based soap made entirely from vegetable oils, without synthetic detergents, sulfates, or preservatives. Conventional body wash typically contains SLS, synthetic fragrance, and chemical preservatives. Dr. Bronner's castile soap uses organic coconut, hemp, jojoba, and olive oils, saponified into a true soap that rinses completely clean.

Dr. Bronner's labels list dilution ratios for 18 applications including face wash, body wash, shampoo, shaving, toothbrushing (with peppermint), hand soap, all-purpose spray cleaner, floor cleaning, toilet cleaning, laundry, baby bath, pet washing, fruit and veggie wash, dish soap, ant repellent spray, window cleaner, car wash, and camping soap. Each application has a specific dilution ratio to ensure effective cleaning and easy rinsing.

Peppermint is the most popular for an invigorating morning shower. Lavender is preferred for evening use. Tea Tree suits oily or acne-prone skin. Almond has a mild, sweet scent that works for most people and is gentle enough for children. For fragrance-free use, the Baby Mild or Baby Unscented formulas work equally well for adults.

For babies under 12 months, use the Baby Mild or Baby Unscented formulas, which are fragrance-free and formulated for newborn skin. The scented variants contain essential oils that may irritate very young or sensitive skin. For toddlers and older children, any of the milder scents such as Almond or Lavender can be used, diluted as directed.

Yes. Dilute 1 part soap to 3 parts water in a small squeeze bottle, apply to wet hair, lather, and rinse thoroughly. Follow with a diluted apple cider vinegar rinse (1 tablespoon per cup of water) if you have hard water or your hair feels waxy after rinsing. It may take two to four weeks for hair to adjust when transitioning from conventional shampoo as the scalp rebalances its oil production.

The white film is soap scum, which forms when castile soap reacts with hard water minerals. It is not a product defect. To prevent it, rinse more thoroughly with plenty of water, reduce the amount of soap used, or follow with a diluted acid rinse such as apple cider vinegar. For tile and bathroom surfaces, spray with a diluted vinegar solution after cleaning to dissolve any residue.

Yes. The formula is readily biodegradable according to OECD 301D testing standards. It is free from phosphates, sulfates, synthetic preservatives, and synthetic fragrance that can persist in aquatic environments. It is safe for grey water systems and septic tanks, and has been used by outdoor enthusiasts for camping and wilderness bathing where biodegradable soap is required.

Yes. The entire liquid and bar castile soap range is certified vegan by Vegan Action. No animal-derived ingredients are used. The only Dr. Bronner's products that are not vegan are the Magic Balm range, which contains beeswax, and these are labeled accordingly.

USDA Organic certification requires that at least 95% of ingredients be certified organic. For Dr. Bronner's, this includes the primary oils: coconut, hemp seed, jojoba, olive, and palm kernel. The certification is verified by Quality Assurance International (QAI) annually. Organic farming prohibits synthetic pesticides, herbicides, and fertilizers across the certified supply chain.

The 946 ml or 950 ml size offers the best cost per ml across the range. Because the soap is highly concentrated and used diluted, a single large bottle used as a household multi-cleaner can last several months. The 60 ml travel size is the most economical choice for testing a scent before investing in a larger bottle. Bundle packs combining 950 ml and 60 ml are available and add convenience for households that want both home and travel sizes.

Unopened Dr. Bronner's castile soap has a three-year shelf life. Once opened, it retains full lathering performance for 12 months. The soap is safe to use beyond this period but may experience some oil separation, which can be corrected by gently shaking the bottle. Bar soap lasts up to three years stored in a dry place and can be used for several months once opened if kept on a well-draining soap dish.

Key ingredients are sourced through fair trade partnerships: coconut oil from Serendipol (Sri Lanka) and Sumbirungu (Ghana); olive oil from Canaan Fair Trade (Palestine); palm kernel oil from Serendipalm (Ghana); and hemp seed oil from certified organic North American farms. Dr. Bronner's publishes annual supply chain reports and holds Fair Trade USA certification for these key ingredients.