Using Follihair tablets more than a year

I have 2 question about follihair tablets. 1)I have been using follihair for more than an year and still using. Is it a good idea using follihair tablets for that long? I just bought 1 year supply recently after completed 1 year using it. 2)Also I have seen there is a difference between old tablets to new tablets ingredients. Old follihair tablets contains 10 mg of biotin with other ingredients compared to new one with just 30 mcg of biotin with other newly added vitamins and minerals. I was wondering does this tablet works as same as old once since it has vast difference on biotin %?(I have also seen difference on other ingredients but since biotin is a major ingredient that prompts hair growth, I was only asking on this)