Is sugar Gluten free?

Is sugar gluten free? And what about yogurt? Additional Details My daughter has issues with gas and my husband is tired alot and has alot of muscle aches and tingling in his hands and feet. So we're going gluten free to see if this helps. My main questions are is sugar gluten free and will I have to switch... show more Is sugar gluten free?
And what about yogurt?

Additional Details
My daughter has issues with gas and my husband is tired alot and has alot of muscle aches and tingling in his hands and feet. So we're going gluten free to see if this helps. My main questions are is sugar gluten free and will I have to switch out my spice cabinet?
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