Mother Dirt, the company that touts probiotic skin care products, has rolled out a series of updates to its biome-friendly shampoo. Mother Dirt Shampoo, which has been preservative-free since its inception, now has an extended expiration date of six months, which the company says is a 3X improvement over the previous iteration. The extension in shelf life also enabled a transition to new packaging for the shampoo, moving away from an airless packaging system to a squeezable bottle that uses 4...