Chromium has been known about for many years, but it is only effectuve if you are deficient in it in your diet, The effect is quite quick so you don't need to use it for a prolonged period. Agree that the picolinate form is more effective.
Beware of overdosing on Vitamin E. There was a fad to guzzle 1000mg caps like sweeties , and it made people quite ill. The upper limit is 1000mg a day. Increases the risk of hemorrhagic stroke and premature death when used to excess.
I have heard of CoQ10 but never tried it, safety trials show that upper limit is 1200 mg per day, Generally considered safe. Seems too expensive for my pocket anyway especially for the small effect it gices.
One supplement they have not included is magnesium, which again has an inital effect if you are deficient, but tails off when you are up to level. The chelated form is most effective, and can often come paired with zinc which is also useful.
German diabetics can get ALA on scrip, It has to be the R-ALA variant not the left handed one or the mixed ones, If it just says ALA then its the mixed ones. Generally safe, but overdose has been known to cause death.