Nature's Sunshine Activated Charcoal contains charcoal powder only. Activated charcoal is commonly used for its adsorbing action, which means it can bind certain unwanted compounds in the gut. That is why it is often used for gas, bloating, and digestive upset after heavy meals or when your stomach feels off.
The product is simple and ingredient-focused, so the main thing before buying is how you plan to use it. Because activated charcoal can also bind medicines and supplements, many people leave a gap between it and anything else they are taking. That binding action is also the reason charcoal is used in a wide range of digestive support products.