I've been drinking V8 (low sodium) because I was trying to increase my potassium.
While sitting at the breakfast table, I was bored, and read the label: It contains potassium chloride!
Silly me: I thought all the potassium was from the veggies.
MUST I READ EVERYTHING?
Being Paleo is exhausting!
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Tomatoes are rich with potassium. Since people want the salt taste they add potassium chloride which isn't much different of an affront compared to adding salt. I find it hard to eat enough food and get a decent amount of potassium so I drink a small glass of TJ's Garden Patch or V8 or one of the organic varieties if I'm feeling wealthy that day.
I spend too much time preparing food as it is, no juicing for me, easier to eat a couple of spoonfuls of tomato paste if need be.
I've drunk low-sodium V8 regularly (1–2 C/day) for a couple of years and haven't noticed any ill effects. Swiss chard is a good natural source for potassium, and as long as you don't overdo them, bananas are also a decent source.
Regarding the intellectual exhaustion, you're on a steep learning curve taking in all this paleo information in a short time. If you want to ease the cognitive load, use other people's paleo recipes for a while, The 21-Day Sugar Detox is chock-full of good recipes, and if you follow the plans, you'll introduce yourself to a lot of new tastes. (Note: you'll need to buy a decent food processor with at least a 10-cup capacity.)
Potassium Chloride is evil? Am I missing something I should know about? I mean sodium chloride is okay, so what's wrong with potassium chloride?
I know you don't need a snarky answer -- and despite that prologe, this is not intended that way.
If you want potassium why not eat bananas, potatoes, leafy greens, avocados, etc...
If you want juice, why not juice yourself, then you know what's in it.