What it is
Tomato, vinegar, spice — and a lot of sugar. US brands usually sweeten it with high-fructose corn syrup.
Why your biology objects
It's roughly a quarter sugar by weight, commonly HFCS, so a tomato condiment delivers a free-fructose hit alongside the lycopene. The tomato is real; the sugar load is the conversation. "No added sugar" versions drop to a footnote.