Creating your own DIY lactic acid body wash can be a great way to incorporate this gentle exfoliant into your skincare routine. Lactic acid is an alpha hydroxy acid (AHA) that helps to exfoliate the skin, remove dead skin cells, and promote a smoother and brighter complexion. Here's a simple recipe to make your own lactic acid body wash at home:

Ingredients:
- 1 cup of unscented liquid castile soap
- 1 tablespoon of lactic acid (you can find this online or at some specialty stores)
- 1 teaspoon of vegetable glycerin (optional, for added moisturization)
- 10-15 drops of your favorite essential oil (optional, for fragrance)

Instructions:
1. In a glass bowl or container, combine the liquid castile soap and lactic acid. Mix well to ensure they are thoroughly combined.
2. If desired, add the vegetable glycerin and essential oil(s) to the mixture. Stir until everything is evenly incorporated.
3. Transfer the mixture into a clean, empty bottle or container with a pump or flip-top cap for easy dispensing.
4. Your DIY lactic acid body wash is now ready to use!

Usage:
To use your homemade lactic acid body wash, simply apply a small amount to a loofah, washcloth, or your hands. Gently massage it onto your body, focusing on areas that may need exfoliation or extra attention. Rinse thoroughly with warm water.

Note: Lactic acid can increase skin sensitivity to the sun, so it's important to use sunscreen and protect your skin from direct sunlight after using products containing lactic acid. Additionally, if you have sensitive skin or are new to using lactic acid, it's always a good idea to patch test the product on a small area of your skin before applying it all over your body.