Proteolytic Enzymes: Systemic Uses Beyond Digestion

Proteolytic enzymes (proteases) break down proteins. When taken with food, they aid protein digestion. But when taken on an empty stomach, some proteolytic enzymes are absorbed into the bloodstream and exert systemic effects — this is the basis of "systemic enzyme therapy," a practice more established in European and Japanese medicine than in US practice.

Key Systemic Enzymes

• Bromelain (from pineapple) — Anti-inflammatory, anti-edema, immune modulation
• Papain (from papaya) — Anti-inflammatory, wound debridement
• Serrapeptase (from bacteria) — Anti-inflammatory, mucolytic
• Nattokinase (from natto fermentation) — Fibrinolytic, cardiovascular

How Systemic Use Works

For systemic effects, proteolytic enzymes are taken on an empty stomach (typically 30-60 minutes before meals or 2+ hours after). This allows them to be absorbed intact through the intestinal wall rather than being used up digesting food protein. Once in the bloodstream, they can break down inflammatory mediators, fibrin deposits, and immune complexes.

The concept is supported by measurable blood-level increases after oral dosing and by clinical trials showing anti-inflammatory effects, though the field still needs more large-scale, rigorous research.