Prolonged Isotetronin habbit. I can use?

I am using isotetronin 20mg alternative day regimen because My liver is weak and I also take a mass gainers alternating day on which I don't take isotetronin which also includes multivitamins like Vitamin A 375 mgc, so I have started mass gainer recently but I am on isotetronin treatment for 7 months, I also had put gap on isotetronin treatment because of my liver toxicity which was Alkaline phosphate 380 and sgot 46, so after treating my lever which is now fine, I again started isotetronin but alternatively, all I wanted to know will this be safe on my liver, I have also scheduled monthly LFT's and lipid level tests. Is there any liver and heart protecting supplements I can use?? I know there are many alternatives to isotetronin but I have tried them all, and isotetronin suits me, I also stop isotetronin every 2 months for 1 month and start again so that it wouldn't damage my liver, but when I stop it I again starts to get acne and darkening of skin, So I have to start again.