[JustAnotherFan]

First, I’d say staying distant is trickier than one thinks. Almost everyone I know breaks down at some point and does something surprisingly risky. (They stay home every day, have everything delivered, wash their groceries, then send their child to a sports camp). And I think it still dominates — I’d imaginine the benefits of one less trip to a grocery store could outweigh the benefits of what food you might get there.

After distancing, masks and washing, my #4 would be taking daily walks in my neighborhood (cardio health, sunlight, mood).

My #5 would be getting a lot of sleep every day (almost every cold/flu I can recall follows a night where I get little sleep).

Generally, I try to eat better now.

In terms of speculative, lower priority things:
There was that email by a molecular biologist that circulated here and elsewhere and he advocated zinc lozenges.

I saw some recent press that for acid reflux, PPIs might be harmful and drugs like famotidone (Pepcid) may be protective.

A doctor I know who is really into supplements has been looing into Glutathione lately.

As far as kimchi, I am not aware of anything being close to proven. But I have found eating fermented vegetables very helpful for my gut, so that also might be a reason to eat some if you enjoy kimchi, sauerkraut, kefir, etc.

I completely agree. I'm not saying that kimchi or vitamin D can come close to simply staying away from others, particularly when indoors. 

Exercise, sleep, and healthy eating. Seems like a winning combination to me.

[JustAnotherFan]

First, I’d say staying distant is trickier than one thinks. Almost everyone I know breaks down at some point and does something surprisingly risky. (They stay home every day, have everything delivered, wash their groceries, then send their child to a sports camp). And I think it still dominates — I’d imaginine the benefits of one less trip to a grocery store could outweigh the benefits of what food you might get there.

After distancing, masks and washing, my #4 would be taking daily walks in my neighborhood (cardio health, sunlight, mood).

My #5 would be getting a lot of sleep every day (almost every cold/flu I can recall follows a night where I get little sleep).

Generally, I try to eat better now.

In terms of speculative, lower priority things:
There was that email by a molecular biologist that circulated here and elsewhere and he advocated zinc lozenges.

I saw some recent press that for acid reflux, PPIs might be harmful and drugs like famotidone (Pepcid) may be protective.

A doctor I know who is really into supplements has been looing into Glutathione lately.

As far as kimchi, I am not aware of anything being close to proven. But I have found eating fermented vegetables very helpful for my gut, so that also might be a reason to eat some if you enjoy kimchi, sauerkraut, kefir, etc.

I completely agree. I'm not saying that kimchi or vitamin D can come close to simply staying away from others, particularly when indoors. 

Exercise, sleep, and healthy eating. Seems like a winning combination to me.