Words like down, in are not always prepositions. Compare:
I ran down the road. He's in his office.
Please sit down You can go in
In the expressions down the road and in his office, down and in are prepositions: they have objects (the road, his office).
In Please sit down and You can go in, down and in have no objects. They are not prepositions, but adverbs of place, which modify the verbs sit and go.
Small adverbs like this are usually called 'adverb particles' or 'adverbial particles'. They include in, out, up, down, on, off, through, past, away, back, across, over, under. Adverb particles often join together with verbs to make two-word verbs, sometimes with completely new meanings. Examples: break down = 'stop working'; put off = 'delay', 'postpone'; work out = 'calculate'; give up = 'stop trying'. For information about these verbs, see the next section.
Benefits of Cauliflower
Low in Calories
Cauliflower and broccoli provide a lot of nutrition for very few calories. Broccoli has only 23 calories per halfcup serving, while a half cup of cooked cauliflower contains only 15 calories. Both vegetables are fat free and sodium free. A dry and itchy scalp may also be the result of the body lacking in one of these essential nutrients. All these factors can help you to get a solution that you might be looking for your hair problems.