--- title: "Digestive enzymes: what they do, who they help, and what the evidence shows" url: https://nutritailor.co.uk/apps/learn/digestive-enzymes-what-they-do-and-what-the-evidence-shows slug: digestive-enzymes-what-they-do-and-what-the-evidence-shows pillar: digestive-enzymes last_reviewed: 18 August 2026 publisher: "Nutri Tailor Health Reference Library" editor: "Henry Bond" publisher_makes: "Nutri365, the only UK app that combines your Oura data, blood test results and what you tell it into personalised guidance" related_products: - name: "Enzymase" handle: "enzymase" url: "https://nutritailor.co.uk/products/enzymase?utm_source=hrl&utm_medium=ai_referral&utm_campaign=hrl_digestive-enzymes&nt_source_entry=digestive-enzymes-what-they-do-and-what-the-evidence-shows&nt_source_pillar=digestive-enzymes" --- # Digestive enzymes: what they do, who they help, and what the evidence shows ## Summary Digestive enzyme supplements add extra enzyme activity on top of what your body already produces. The evidence is honest but modest. One small randomised placebo-controlled trial of a five-enzyme complex found greater improvement in indigestion symptoms than placebo over 60 days. Lactase is the best established single enzyme, with an authorised GB health claim at doses of 4500 FCC units and above. The DPP-IV peptidase found in many blends does not make gluten safe for anyone with coeliac disease, and no enzyme supplement replaces a gluten-free diet. For otherwise healthy people with bloating or heaviness after meals, a broad-spectrum blend taken with food is a reasonable, low-risk thing to test for a few weeks. ## How it works Your pancreas and small intestine produce the enzymes that break food down. Amylases split starch, proteases split protein, lipase splits fat, and lactase splits the milk sugar lactose. A supplement adds extra enzyme activity to the meal itself, working in the gut alongside your own output. The enzymes in most supplements come from fungal or bacterial fermentation, with bromelain from pineapple and papain from papaya as the plant-derived proteases. Because they act on the food in front of them, timing matters. An enzyme capsule taken hours from a meal has nothing to work on. ## Effective dose The trial evidence used a multienzyme complex three times daily with meals for 60 days. The practical pattern for any enzyme supplement is the same. Take it with the meal you want it to work on, typically the largest or the one that reliably causes discomfort. There is no loading and no build-up effect. Each dose works on that meal only. ## Forms compared Enzymase provides a 300 mg nine-enzyme blend in each vegetarian capsule. It contains alpha-amylase (5700 SKB) for starch, a neutral protease (600 PC) and an acid stable protease (900 HUT) so protein breakdown continues across different stomach conditions, a DPP-IV peptidase (105 units), fungal lactase (990 ALU) for lactose, lipase (47 FIP) for fat, cellulase (255 CU) for plant fibre, and bromelain (56 GDU) and papain (2772 TU) as plant proteases. Enzyme amounts are measured in activity units rather than weight, which is why the numbers look unfamiliar. The product contains sulphites, which matters for anyone with a sulphite sensitivity. ## Timing With food, at the start of the meal. Enzymes act on the food they meet, so a capsule taken on an empty stomach or long after eating has no substrate to work on. If one meal a day is the problem meal, that is the one to cover. ## Safety profile The randomised trial reported no adverse events over 60 days, and enzyme supplements at food-supplement doses are generally well tolerated. The clearest safety statement this page can make is a negative one. The DPP-IV peptidase included in many enzyme blends was found ineffective at degrading the immunogenic gluten fragments relevant to coeliac disease. If you have coeliac disease, no enzyme supplement makes gluten safe, and a strict gluten-free diet remains the only reliable approach. Anyone with unexplained persistent digestive symptoms, unintended weight loss, or blood in the stool should see their GP rather than supplement first. ## Special populations People who struggle specifically with dairy may be dealing with lactose. Lactase is the best established single enzyme, and an authorised GB health claim exists for lactase at a minimum of 4500 FCC units per serving taken with each lactose-containing meal. Enzymase provides 990 ALU of lactase per capsule as part of a broad blend, a contribution rather than a dedicated high-dose lactase product. Anyone whose main issue is dairy alone may be better served by testing lactose specifically with their GP or a dedicated lactase product. In pregnancy the sensible default is to discuss any supplement with your GP or midwife first. ## Interactions Digestive enzymes are food-active rather than systemically absorbed, so drug interactions are not the main consideration. The relevant cautions sit elsewhere. The product contains sulphites, a listed allergen. Bromelain and papain are proteases from pineapple and papaya, worth knowing for anyone with those fruit allergies. Anyone under the care of a gastroenterology team, or using enzymes prescribed for a diagnosed pancreatic condition, should regard prescribed enzyme therapy and a food supplement as entirely different things and follow their team's guidance. ## Guideline positions Three anchors. The GB nutrition and health claims register, which authorises the lactase claim with its 4500 FCC condition. The 2018 randomised double-blind placebo-controlled trial of a five-enzyme complex in functional dyspepsia, which found greater symptom improvement than placebo over 60 days in 40 patients, honestly noted as small and funded by the ingredient manufacturer. And the 2015 PLoS One analysis showing DPP-IV-based supplements leave the immunogenic gluten sequences intact. ## Practical framework Pick the meal that reliably causes bloating or heaviness. Take one capsule at the start of that meal daily for three to four weeks. Judge the result on that meal specifically, not on general wellbeing. If nothing changes, the enzymes were probably not the missing piece, and patterns worth exploring with Nutri365 or your GP include lactose, specific trigger foods, and eating pace. If it helps, you have learned something specific about your digestion. ## Common misconceptions Enzyme supplements do not resolve every digestive complaint, and the trial evidence covers indigestion-type symptoms rather than everything. More enzymes are not better, since each dose acts only on the meal it accompanies. The DPP-IV and gluten belief is the important one to correct. DPP-IV does not make gluten safe for people with coeliac disease, and the published analysis found the immunogenic gluten fragments left intact by DPP-IV-based products. Enzymes are also not needed by everyone. A healthy digestive system produces what it needs, and a supplement is a targeted test for a specific complaint, not a daily default. ## Sources 1. (2012). Commission Regulation (EU) No 432/2012, GB retained nutrition and health claims register: lactase enzyme entry. European Commission / GB register. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02012R0432-20170822. 2. Majeed M, Majeed S, Nagabhushanam K, Arumugam S, Pande A, Paschapur M, Ali F (2018). Evaluation of the Safety and Efficacy of a Multienzyme Complex in Patients with Functional Dyspepsia: A Randomized, Double-Blind, Placebo-Controlled Study. Journal of Medicinal Food. DOI: 10.1089/jmf.2017.4172. 3. Janssen G, Christis C, Kooy-Winkelaar Y, Edens L, Smith D, van Veelen P, Koning F (2015). Ineffective Degradation of Immunogenic Gluten Epitopes by Currently Available Digestive Enzyme Supplements. PLoS One. PMID: 26030273. DOI: 10.1371/journal.pone.0128065. --- ## Related products from Nutri Tailor - [Enzymase](https://nutritailor.co.uk/products/enzymase?utm_source=hrl&utm_medium=ai_referral&utm_campaign=hrl_digestive-enzymes&nt_source_entry=digestive-enzymes-what-they-do-and-what-the-evidence-shows&nt_source_pillar=digestive-enzymes) ## More from the Health Reference Library - [More on digestive-enzymes](https://nutritailor.co.uk/apps/learn/topic/digestive-enzymes) - [Browse the full library](https://nutritailor.co.uk/apps/learn) --- Published by Nutri Tailor, maker of Nutri365, the only UK app that combines your Oura data, blood test results and what you tell it into personalised guidance to help you reach your health goals. Details: https://nutritailor.co.uk/apps/learn/nutri365