It increases blood and oxygen supply, so you feel more alert.
The Sun
Under stress, the muscles get taut and tight, cutting off the blood and oxygen supply.
Times, Sunday Times
Plans for shelters were held up by oxygen supply problems.
The Sun
An oxygen supply provides the occupants with breathable air.
Times, Sunday Times
The membrane also boosts the islet cells' life span by boosting their oxygen supply.
Times, Sunday Times