Heirloom vegetables grow more slowly and spoil much more quickly than modern crops. This is because modern crops have less nutritional value - https://jeroenvanbaar.substack.com/p/data-dispatch-4-the-falling-nutritional
That article recommends eating a better diet. Sure. Seems a bit idealist. Here's some more actionable advice: everyone should take a multivitamin and magnesium glycinate. If you live somewhere that gets a winter take vitamin D too.
I'm speaking from experience here, I used to get sick every winter and my skin would get so dry it would crack and bleed. Take your vitamins.
I thought they were assorted animal and plant planktons, fish larvae, crustacean larvae, small crustaceans, and anything else floating by.
The wiki says there are 380 BILLION tons of krill swimming around in Antarctic waters, and that's just one species.
krill are tiny little crustaceans, they do count as plankton but all krill are animals