If you load up the game and go to jake's blight outfit you'll see that the vials on his chest are empty. It has been this was since the Haddonfield update. The juice shows up when I get downed. They used to have bright orange juice in them. It isnt my graphics settings, it's like this for everybody.
The first time I noticed this was when the Haddonfield rework dropped, it's been like this ever since.