Supplement analysis backed by scientific evidence · PT

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Limited evidenceGut health

Digestive Enzymes

Prescription-grade pancreatic enzymes are genuinely effective for diagnosed exocrine pancreatic insufficiency, and lactase works for lactose intolerance. Over-the-counter multi-enzyme blends marketed for bloating in people with normal pancreatic function have almost no supporting evidence.

What the science says

  • Pancreatic enzyme replacement therapy for exocrine pancreatic insufficiency Strong evidence

    A meta-analysis of randomised trials in chronic pancreatitis found pancreatic enzyme replacement therapy significantly improved coefficient of fat absorption versus placebo (roughly +14 percentage points) and reduced steatorrhoea and abdominal symptoms. A 2025 systematic literature review confirmed consistent benefit on fat absorption and nutritional status across aetiologies. This is a medical therapy with a real, well-defined indication — not a general digestive aid.

  • Lactase for lactose intolerance Moderate evidence

    Exogenous lactase taken with dairy reduces hydrogen breath excretion and symptoms in lactose maldigesters, and works in a clearly dose-dependent way. Evidence for other uses is thin: a 2024 systematic review of lactase for infant colic found no reliable benefit.

  • OTC enzyme blends for bloating in healthy people Limited evidence

    Broad-spectrum blends (protease, amylase, lipase, cellulase, bromelain, papain) are widely sold for bloating and 'poor digestion' in people whose pancreas works normally. There are few placebo-controlled trials, most are small, industry-funded and short, and healthy pancreatic output already vastly exceeds what a capsule supplies. Alpha-galactosidase for bean-related gas is the one OTC enzyme with modest supporting data.

  • Correcting 'enzyme deficiency' with age Limited evidence

    Marketing claims that enzyme output declines meaningfully with age and needs supplementing are not supported by physiological data — pancreatic reserve is large, and clinically relevant insufficiency requires losing roughly 90% of exocrine function. Absent a diagnosis (faecal elastase, imaging), supplementation has no established rationale.

Dosage & safety

Studied dosePancreatic enzyme replacement (prescription in most countries): 40,000-50,000 USP lipase units with main meals, half that with snacks, taken during the meal; titrate upward if steatorrhoea persists. Lactase: 3,000-9,000 FCC units immediately before dairy, scaled to the lactose load. Alpha-galactosidase: ~300-450 GalU with the first bite of a legume-containing meal. OTC blends have no established effective dose.
SafetyGenerally well tolerated. High-dose pancreatic enzymes carry a dose-related risk of fibrosing colonopathy, mainly documented in children with cystic fibrosis above ~10,000 lipase units/kg/day — stay within prescribing limits. Porcine-derived pancrelipase is unsuitable for those avoiding pork and can cause hyperuricosuria and perianal irritation. Pancrelipase is prescription-only in the US, EU and UK; OTC 'pancreatin' supplements are unregulated for potency and often contain far less activity than labelled. Bromelain and papain can potentiate anticoagulants and cause allergic reactions (bromelain cross-reacts with latex and pollen). Enzyme supplements do not substitute for evaluation of unexplained bloating, weight loss or steatorrhoea — those need a diagnosis.

Scientific references

Where to buy

Double Wood Supplements, Essential Digestive Enzymes, 180 Capsules

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