Sauce

"Juice, juice is temporary. Anyone can obtain the juice. You can say just because you’ve got a nice car you can say, ‘ah man, he’s got the juice’. You know what I’m saying? It’s something that kind of comes and goes. ‘But the sauce — the sauce is forever. ‘You buy you a Simply Lemonade. How long does that last in your fridge? A couple of days maybe. That’s the juice. ‘How long does barbecue sauce last in your fridge? A while. That’s the sauce man, it sticks around. It sticks. It’s hard to move. I’m telling you, there’s a difference."

―A best buy employee explaining the difference between juice and sauce

Sauce is the essence of life itself. It was created by the god of sauce, Mr Popo. Every sentient being has a sauce level, which is the numerical form of how much sauce they have. A higher sauce level often means they have immense power, although this isn't always the case. Beings with unnaturally high levels of sauce are usually gods, demigods, or simply people who have a lot of sauce. The only way to read someone's sauce level is by having psychic powers and reading their mind, or by using a sauce scouter.

Sauce Scouters
The sauce scouter is a device created by Mr Popo to read the sauce levels of any lifeform. The wearer can check their own sauce levels with one, and automatically the closest being to the lens that isn't the wearer.