How safe is aspartame for human consumption?

There's so goddamn much conflicting information here that I don't know what to think. There's retards injecting aspartame directly into the bloodstreams of rats an observing that they get brain cancer, but there's also people presenting papers over the course of seven years suggesting over and over that it induces oxidative stress on human brains when ingested daily within FDA limits.

The FDA and many other health organizations approve of the use of the chemical in products, several papers claim it's all hysteria and sensationalism pushed by journalists who'll read a paper that says "we asked women once how regularly they've been drinking diet soda in the last 12 years and we didn't ask about their other lifestyle choices" and write articles that read "over 12 year long study scientists prove women who drink diet soda are more at risk of early death." Some sources state the amount of methanol and phenylalanine ingested after consuming aspartame is minute and other more natural foods will lead to greater ingestion of the chemicals, but others say the methanol causes brain tumors in rats and the phenylalanine results in rapid brain cell death.

I don't know what to think. I just want to drink a fucking grape soda or something.