Too much vitamin a can build up in the liver. Vitamin D3 should be safe and I recommend it. A lot of people are low on it anyway. I just started taking it so if you'd like I'll tell you how it goes.

Also please correct me if I'm wrong about vitamin a

How much D3 are you going to be taking? I'm taking the usual 1000iu. Are you taking anything with it? I've read about A being good to and needed, so you'll just be taking the D3?

Anyone? really need help on this so i don't take a vitamin I don't need to. I'm hoping clayman is right and I can just take d3

Do you think vitamin a is a good idea though? Or should I just take the vitamin d3? I'm not doubling up or anything, I'm just taking one d3 and one a. It's 1000 d3 and 8000 Vitamin A.

I would take just D3 but I read that A is good to balance it out.

Generally people find vitamin D3 can help reduce oil but that does't mean it will if you have oily skin.

And vitamin A is concerned with keratinization and the development of skin cells. Also an antioxidant which is always great for the skin.

"Vitamin A, and more specifically, retinoic acid, appears to maintain normal skin health by switching on genes and differentiating keratinocytes (immature skin cells) into mature epidermal cells" -  Fuchs E, Green H (1981). "Regulation of terminal differentiation of cultured human keratinocytes by vitamin A". Cell 25 (3): 617“25.

ME RAMBLING: I'm not sure about ratios and whatnot but what i'm trying to get at is that these vitamins have different pathogenic roles in the development in acne if they are indeed involved in your specific case. Soooo, if you don't oily skin then don't bother with the D3, and if you don't feel as if your acne is related to how your skin cells shed (which I guess is kind of ambiguous) then hold back on A. It seems that people need to take more than the recommended daily dose of whatever vitamin to get an effect as you've probably read, so it's a waste of money to just take it because someone with totally different skin said it worked for them.  END RAMBLING

It's pretty hard to find decent medical advice for that on the internet, but as far as I see vitamin d3 isn't like zinc for example where your copper stores can be depleted etc. So I think if you believe it will help try it for a good few months and if you find it works then it's best to ask your doctor about using it long term and if it may need to be taken with anything else, like vitamin A, as you said you've read about. 

Thank you for the info. I am going to just take D3 for now (trying 2000) and seeing what happens. I noticed some tiny pimples forming, not sure if A or D3 caused it, but I'll use D3 and see how it goes with just. I'm mainly concerned about my skin being oily so using D3 makes sense.

Like many I've had this constant go of trying to see what the heck I can do, even at 33. Been dealing with it since I was 16. Right now I am just using Baby shampoo b/c I wanted to see if BP was irritating my skin. I was just using a BP 2.5% wash for a long time. Surprisingly after over a month of just baby shampoo..my breakouts aren't extreme (I'm not getting cyst like ones like I used to.) I still get littles one that form into blackheads, but I've noticed how oily my skin is, so I'm seeing if the vitamin helps that. I still would like to use a different gentle cleanser (because using just baby shampoo doesn't help when I do get some.) I use Sacillic Acid 2% on spots when I need to. I had clindamycin but it didn't seem to keep things under control so I stopped that a couple weeks ago, no real issues. I also got tretinoin from my derm and I feel stupid b/c I went to all these trouble with my health insurance and finally got it, and it cost $85 bucks and then I looked it up and the horror stories about how bad it was for your skin and what would happen, I just didn't even bother with it.

So right now I'm just baby shampoo. Really want to use a gentle cleanser that's actually FOR the face and oily/acne prone skin, BUT, looking for one of those that sounds good is the biggest pain. Nearly everyone I Find has bad reviews about break outs or it contains ingredients that are pore clogging (SLS) and other things. So, I've never found one I want to try. I did try Neutrogena Hydrating awhile ago but it broke me out and didn't do anything. Baby shampoo was recommended by my derm but it was b/c I was going to be using the tretinoin. So now that I'm not, I don't know what I should be washing my face with instead of baby shampoo!