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Yes, Haidilao hotpot bases generally contain both sugar and monosodium glutamate (MSG). Various flavors of their hot pot seasonings, such as mushroom or mala, include sugar and MSG as part of the ingredients. MSG is a common flavor enhancer in many of their soup bases, and sugar is often used to balance flavors | NTUC FairPrice .
If you are sensitive to these ingredients or prefer to avoid them, it’s a good idea to check the ingredient list for each specific soup base you plan to use.