A lovely combination of activated charcoal, bentonite clay, and pumice is generally considered highly effective for treating acne, particularly for oily and acne-prone skin types. These ingredients work together to deeply cleanse pores, absorb excess sebum, exfoliate dead skin cells, and reduce inflammation, helping to combat both active breakouts and blackheads. 
Key Benefits of the Trio:
Bentonite Clay: Acts as a powerful adsorbent to pull out impurities, toxins, and excess oil from pores. It also helps soothe inflammation.
Activated Charcoal: Known for its high absorptive capacity, it attracts and removes dirt, oil, and toxins from the skin.
Pumice: Provides gentle exfoliation, removing dead skin cells that can clog pores and contribute to acne, promoting smoother skin.