Weed can be taken inside not just due to smoking or vaping, but also via edibles. Special cbd pills and cbd gummies contain cannabidiol, too (but devices like Yocan Evolve D Plus provide with better effect ).
Everything depends on the cannabis you get. I mean the form of it. If you take cbd oils, it won't be for a long time in your body. Moreover, cbd can be used even by kids. This is a sign that this product is safe. You can even read about cbd oil for adhd kids if you don't believe me