Amylase breaks down complex starches into simpler sugars that the body can absorb. The pancreas and salivary glands produce it naturally, but supplements can give extra support when a meal is heavy on carbohydrates. Most people take it just before or alongside starchy food.
Common complaints like bloating, gas, and discomfort after processed carbs or large meals are why people turn to amylase. It often appears as one piece of a wider digestive enzyme formula.
About safety: high doses can cause mild stomach upset. If you have a mold allergy, check the label because many enzyme supplements come from Aspergillus. Anyone pregnant or nursing should speak with a healthcare provider first.