Absolutely true. Aspartame is generally regarded as safe under 40mg/kg and still researching long term effects doesn’t mean it’s dangerous, just that there may be more to discover. To be fair, science is constantly evolving and new discoveries are being made every day for… well, everything. Still, if you want to find the “healthiest” way to get your daily caffeine, there are options out there with minimal additives. Black coffee, tea, seltzers, even pills.