What is in Apple Cider Vinegar that's helping me so much?

Hi,

I suspect I have a major deficiency of some sort. I've been struggling with a number of issues like weight loss (/muscle loss), paleness, blurred vision, digestion problems/gassiness and unhealthy stool (not diarrhea but not ideal at all), chronic fatigue, psoriasis, depression, overall feeling of weakness.

Perhaps I should also add that I have had an alcohol problem in the past where I would drink about 8 beers a day but I've been sober for almost 2 years now. I don't drink coffee or soda and I generally live a very healthy lifestyle.

I've gotten blood tests and they came back fine, my doctor is putting everything under the depression banner but I really doubt that is the problem at all, as I'm 100% sure that if I felt healthy I would be a very upbeat person I always have been.

I had been been trying out vitamins like b1/b-complex/multi-vitamins/d3/C and they seem to be helping me somewhat but I havent figured it out 100% which is just frustrating me alot because I have had some really good days in the last half year.

Now onto the apple cider vinegar...

I had read about this stuff online so I bought some organic apple cider vinegar. The first time I used it was literally an eye opening experience, my vision was 100% better and I could see far in the distance again, I had energy and an overall feeling of "normality". Basicly I would give anything to feel like that day everyday.

I of course kept using it but I think that it's not all to the good and I want to find out which vitamin or mineral is in there that's helping me so much?

PS: Also, when I take a multi-vitamin daily, I look much healthier and get a bit of colour back in my face and a bit more energy but at the same time it's making me feel more depressed when I do take it, I think because of some of the other things that are in it that I don't need at all because I already have a healthy diet.

I want to figure out which vitamin it is that could solve my blurred vision and other problems so if anyone has any ideas after this long story I just wrote, please help me figure this out!