Learn Spanish (Latin America): Añade canela a la comida y la inflamación bajará. - Add cinnamon to the food and the inflammation will go down.

You have spotted the colloquial conditional structure! By combining an imperative command (añade) with y (and) plus the future tense (bajará), you create a conditional meaning. It is a punchier, more conversational way of saying 'If you add cinnamon...' (Si añades canela...).

Could I use the present tense here and say y la inflamación baja instead of bajará?

Yes, absolutely. In these 'imperative + y' structures, you can use either the present indicative or the future tense for the result. Using the present (baja) makes the result sound immediate or like a guaranteed fact, while the future (bajará) frames it as a natural consequence that will happen next.

Why is there no article before canela? I thought Spanish usually required articles for nouns.

Spanish requires articles for general subjects or categories (like la canela es deliciosa). However, when you are talking about an unspecified quantity of a mass noun, like 'some cinnamon', you drop the article just like in English. So añade canela simply means 'add cinnamon'.

Is bajar the most natural verb to use for swelling or inflammation 'going down'?

Yes, it is very common and natural! While you could use a formal term like disminuirá (will decrease) or se reducirá (will reduce), bajar is the perfect everyday verb for a fever, a price, or an inflammation 'going down'.