That's great news, Isthmus.
In my case, years ago I tried the standard 15 - 30 mg doses of zinc after reading about its connection to acne. Those doses were nowhere near enough to have any noticeable impact on my acne. At first I assumed this meant I wasn't zinc deficient, but later, in desperation, I tried higher doses and it helped. That's why I think a zinc tally test may be a good idea for people with stubborn acne, as it's difficult to know how much is needed otherwise.
Bear in mind that zinc depletes copper, so I buy a zinc supplement (Solaray Zinc Copper) that contains copper and is also chelated for bioavailability (which also helps prevent stomach upset), and I also try to eat zinc-rich raw Paleo foods, of course, but they are unfortunately still not quite enough at times, especially after some days of eating more fruit than usual, or occasionally when indulging in some mead or other alcoholic or sugary beverage, such as fruit juice (which I rarely bother with any more, as even unpasteurized fruit juice can trigger some zits for me, except for low-sugar types like lemon juice). Luckily, the zinc outbreaks are becoming increasingly rare and supplementation less necessary, but it has taken years of mostly-raw Paleo, not days or weeks.
Oddly enough, adding small amounts of fermented raw honey to the mix seemed to help, though it's difficult to tell how much. Maybe it has improved my ability to digest and absorb carby foods somewhat.
In my case, cooked meats have never triggered any acne breakouts, for whatever reason, but too much raw fruit can, especially certain ones, like the citrus fruits that were mentioned, even if I have no apparent allergic reaction to them (and allergies also wouldn't explain why unfermented raw honey and mead can trigger some zits for me, but not fermented raw honey).
I wish there were simple home tests for other minerals beyond zinc. Anyone know of any?