Is Glucose Halal?

Glucose in food is a syrup or powder made by breaking plant starch down into simple sugars. It comes from maize, wheat or potato, and it is Halal.^[2][1]

How glucose syrup is made

Starch is mixed with water and broken into shorter and shorter chains by enzymes (made by microbes) or by acid, then filtered and concentrated. How far the process runs decides the result: a syrup that is only partly broken down is thick and mildly sweet, one that runs further is thinner and sweeter, and one that runs to completion is pure glucose, which can be crystallised as dextrose. Some syrups are then partly converted into fructose, giving glucose-fructose syrup, known in the US as high-fructose corn syrup.^[3]

Why it is in so many foods

• Sweets and chocolate bars – stops sugar crystallising, so caramel stays chewy and fondants stay smooth.
• Ice cream and sorbet – lowers the freezing point and keeps the texture soft.
• Jams and fruit fillings – adds body and shine.
• Baked goods and cereal bars – keeps them moist and binds the ingredients.
• Soft drinks and sauces – sweetness and body at low cost.

Wheat on the label

Glucose syrup made from wheat must name wheat for allergy labelling, even though almost no gluten survives the process. That is an allergy note, not a Halal one.

The questions around it

Glucose itself never makes a product doubtful. In a sweet or dessert, the Halal questions are the gelatin, colours such as carmine, and any alcohol-based flavourings. For the starch family it belongs to, see maltodextrin, cornstarch and sugar.