Learn Spanish (Latin America): A lo mejor necesitas más proteína para poder adelgazar. - Maybe you need more protein to be able to lose weight.

While expressions of doubt like tal vez or quizás often trigger the subjunctive, a lo mejor is a classic exception. It always takes the indicative, even though it means "maybe." That is why we use the indicative necesitas instead of the subjunctive necesites.

How could I express a similar idea using this lesson's connector, de ahí que?

De ahí que means "hence" or "that is why," and it always requires the subjunctive. To use it, you would state a premise first, then the conclusion. For example: Estás perdiendo músculo, de ahí que necesites más proteína (You are losing muscle, hence you need more protein). Notice how necesitas must change to the subjunctive necesites after de ahí que.

Why use poder adelgazar instead of just para adelgazar?

You absolutely can say para adelgazar to mean "in order to lose weight." Adding poder emphasizes having the ability or physical capacity to do it, translating directly to "to be able to lose weight." Stacking infinitives like poder adelgazar after a preposition like para is completely natural in Spanish.

Are adelgazar and bajar de peso interchangeable here?