Is chewing gum halal?

Yes, most chewing gum is halal. The gum base, sweeteners and mint flavours are normally fine. A few gums contain ingredients that are haram or doubtful, such as pork gelatin, animal-based glycerin or colours like carmine, so it's worth a quick look at the label.

What's in chewing gum?

Modern chewing gum is made from a synthetic gum base (a kind of food-grade polymer), sweeteners like sugar, xylitol or sorbitol, softeners, flavours and colours. The gum base is usually plant-based or synthetic and is generally considered halal. Most mint and fruit gums sold in the UK, Europe and the USA have no animal ingredients at all.

Ingredients to check

Gelatin. Some gums, especially chewy, coated or "soft" types, contain gelatin, which is usually from pork in the West unless stated. See Can I still eat gummy bears as a Muslim?
Glycerin (E422). It can come from plants or animal fat. Most gum makers use vegetable glycerin, but it isn't always stated.
Carmine (E120). A red colour made from insects. Many scholars allow it, while others avoid it.
Lanolin. Sometimes used in the gum base. It comes from sheep's wool, so it is halal.
Other E-numbers such as E471 or E904 (shellac). See Are E-numbers halal?

How to be sure

A "suitable for vegetarians" or "vegan" label removes almost every concern. Some brands carry a halal logo in certain countries, and many company websites list which products are vegetarian. If a gum lists vague ingredients and you can't find out more, scholars call it mashbooh (doubtful). The Prophet ﷺ advised avoiding doubtful things where possible (Sahih al-Bukhari 52), so pick a brand you're sure about. If you chewed a doubtful gum before you knew, there's no sin on you.

Gum and manners

Chewing gum is allowed, but keep good manners in mind. Avoid loud chewing and blowing bubbles while talking to people, take it out before you pray, and don't chew it in the mosque during the khutbah. Throw it away properly rather than sticking it under seats or on pavements; keeping public places clean is part of faith.

Gum while fasting

Chewing gum during a fast is a different question from whether the gum is halal. Flavoured or sweetened gum breaks the fast according to most scholars. See Can I chew gum while fasting?

Key points

Most chewing gum is halal.
Check for gelatin, animal glycerin and carmine.
A vegetarian or vegan label removes most doubts.
Chewing gum breaks the fast for most scholars.

Tip: Keep a pack of a gum you've already checked in your bag. It's an easy way to freshen your breath before Jumu'ah or meeting people, without wondering what's in it.