There is no single fixed number. Bromelain content varies by pineapple variety, ripeness, the part consumed (stem vs. fruit), storage, and processing. Enzyme activity is heat-sensitive and may drop with canning/cooking. Therefore, a “slice” of pineapple cannot be equated to a standardized supplement dose. Pineapple’s main dietary value is hydration, fiber, and micronutrients; for standardized enzyme activity, supplements are more controllable—but safety and quality checks matter.