This is an extension of a comment I made that I can't find and also a request for examples. It seems plausible that, when giving advice, many people optimize for deepness or punchiness of the advice rather than for actual practical value. There may be good reasons to do this - e.g. advice that sounds deep or punchy might be more likely to be listened to - but as a corollary, there could be valuable advice that people generally don't give because it doesn't sound deep or punchy. Let's call this boring advice.
An example that's been discussed on LW several times is "make checklists." Checklists are great. We should totally make checklists. But "make checklists" is not a deep or punchy thing to say. Other examples include "google things" and "exercise."
I would like people to use this thread to post other examples of boring advice. If you can, provide evidence and/or a plausible argument that your boring advice actually is useful, but I would prefer that you err on the side of boring but not necessarily useful in the name of more thoroughly searching a plausibly under-searched part of advicespace.
Upvotes on advice posted in this thread should be based on your estimate of the usefulness of the advice; in particular, please do not vote up advice just because it sounds deep or punchy.
For one-time doses, yes, otherwise salmon would be regarded as toxic. For continual dosage, not so much.
The kidneys can excrete potassium. The liver can process alcohol. That's not to say it's wise to consume large amounts of either; and long-term potassium exposure has been associated with reduced kidney function (note: the evidence definitely suggests renal failure causes high potassium exposure; AFAIK the reverse causation is largely theoretical at this point). Also note that kidney function can be impaired just by not drinking enough water.
I'm not saying don't take it. Although 1-2 grams a day is pushing it -well- into the "You should consult a doctor before doing this" category. I'm saying be really careful when you take it. It's not something somebody should do without research. The issue with supplements is that they don't replace anything you eat. And when somebody does something silly like eat six pounds of salmon in a day, with your supplement level, they're at risk of harming themselves.
[Edit: In point of fact, your post reminded me to order some potassium, which I've been meaning to do but haven't gotten around to. I would just prefer a disclaimer on there about being careful with it.]
Everything I see in a quick search on google scholar says that healthy adults excrete extra and there is no established upper limit, this implies the upper limit is far enough away that almost no one ever hits it.
One data point: One banana contains 400+ mg of potassium and no one has had potassium related issues on a 30 bananas a day (12,000mg) diet.