The color and thickness of cum is an indirect indicator of health. Same as dick size. Most men see an increase in size when they restore their vitamin D + K levels because they are deficient in it, and blood flow is not optimal.
Eating things like pineapple (and abstaining for a while) can improve semen quality and appearance, but I don't know exactly why. It might be zinc.

Here's some sources to explore:
https://www.perplexity.ai/search/why-does-pineapple-and-other-f-fvG5XuA7SNiBS_RnJh.ESw