Fructose | whatsinit

About

What it is and where it shows up.

Fructose is a naturally occurring monosaccharide found in fruits, honey, and root vegetables, and is also manufactured commercially from corn starch for use as a nutritive sweetener in processed foods and beverages. It is approximately 1.2–1.8 times sweeter than sucrose and is valued for its high sweetening power and relatively low acute glycaemic index.

Safety summary

The regulatory and scientific consensus.

Excessive fructose intake is strongly associated with non-alcoholic fatty liver disease (NAFLD), dyslipidaemia, obesity, and insulin resistance due to its near-exclusive hepatic metabolism, which bypasses normal glycolytic regulation and promotes de novo lipogenesis. The WHO recommends limiting all free sugars (including added fructose) to less than 10% of total daily energy intake to reduce the risk of obesity, metabolic syndrome, and dental caries. Individuals with hereditary fructose intolerance, fructose malabsorption, irritable bowel syndrome (IBS), gout, or pre-existing liver disease face heightened risks and should restrict or avoid fructose.

Regulatory landscape

What food-safety regulators have decided.

Jurisdiction	Status	Note
EFSA (European Food Safety Authority) (European Union)	Approved	Fructose is not assigned an E-number and is not listed as a food additive under Regulation (EC) No 1333/2008; it is regulated as a food ingredient (sugar) rather than as a food additive. EFSA has published dietary reference values recommending caution with high free-sugar intake. No ADI has been formally established.source
FSSAI (Food Safety and Standards Authority of India) (India)	Approved	FSSAI's Food Safety and Standards (Advertising and Claims) Regulations define 'sugars' as all monosaccharides including fructose. Fructose is permitted as a food ingredient under the Food Products Standards and Food Additives Regulations, 2011, with no specific maximum use limit; GMP applies.source
FDA (Food and Drug Administration) (United States)	Approved	Crystalline fructose is affirmed as Generally Recognized as Safe (GRAS) under 21 CFR 184.1318 for use as a nutritive sweetener at GMP levels in food. No maximum daily intake has been specified.source

Who should approach with care

Whose guidance would steer them away.

Other — Individuals with hereditary fructose intolerance (HFI), an autosomal recessive disorder of aldolase B, must strictly avoid all fructose as even small amounts cause severe hypoglycaemia, vomiting, and potentially fatal hepatic failure.

Ibs — Fructose malabsorption is a recognised trigger for IBS symptoms—bloating, abdominal pain, and diarrhoea—because incompletely absorbed fructose is fermented by colonic bacteria, generating gas and osmotic effects.

Liver Disease — Fructose is metabolised almost exclusively in the liver and drives de novo lipogenesis, which can accelerate progression of non-alcoholic fatty liver disease in people with pre-existing hepatic steatosis or fibrosis.

Diabetes — Although fructose has a lower acute glycaemic index than glucose, chronically high intake promotes insulin resistance, worsens dyslipidaemia, and contributes to poor long-term metabolic control in individuals with type 2 diabetes.

Gout — Fructose catabolism generates uric acid as a by-product; high fructose intake can raise serum urate levels and precipitate or worsen gout flares in susceptible individuals.

Research citations

The sources behind this verdict.

1FDA. Code of Federal Regulations Title 21, Part 184.1318 – Fructose (Crystalline). ecfr.gov
2PubMed. Dietary fructose and non-alcoholic fatty liver disease. pubmed.ncbi.nlm.nih.gov
3FSSAI. Food Safety and Standards (Advertising and Claims) Regulations – Compendium, 2022. fssai.gov.in
4WHO. WHO Guideline: Sugars Intake for Adults and Children, 2015. who.int
5EFSA. Scientific Opinion on Dietary Reference Values for carbohydrates and dietary fibre, 2010. efsa.onlinelibrary.wiley.com

Independently researched5 citations