I have recently been using the Whole Earth and Sea Bone Structure multivitamin partly because it has much more reasonable doses of almost everything (except B12 for some reason):
They liquify plants and then ferment them in some proprietary process that they don't go into detail about (I wouldn't be surprised if they use some GMO bacteria that goes against the non-GMO advertising, since many commercial vitamins are produced by GMO bacteria). I just use two pills a day (what the chart shows data for, most vitamins from 1/3 to 2/3 of recommended daily amount). Eating a healthy diet, there should be no need for 100% or more of nutrients in a supplement, but it is frustratingly difficult to find reasonably dosed multivitamins.
If you do strenuous workouts frequently then this helps you recover faster and workout longer. If you are just couch potato then it’s actually detrimental and you can develop all sorts of problems including peripheral neuropathy.
I used to run ultra marathons, when you push your body to the limit like this, you do run into limits and deficiencies, not chronically but during hours of running and this extra overdosing does help the body function better
Ultra-marathons aren't "strenuous exercise" by any reasonable definition, they're much more extreme. For most people "strenuous" involves high heart rates for a half hour or so.
Here's a breakdown of the DV for some of the vitamins for a full serving:
B1 = 33x (yes, 3333%)
B2 = 30x
B6 = 40x
B12= 83x