Jayman,
I only take 300 mg of turmeric with 285 mg of it being curcumin extract. I take one 300 mg capsule twice a day. Be careful with the Walmart stuff. One bottle I looke at had 450 mg of curcumin longa root, but only 50 mg of curcumin extract. I don't know if their is a different between the % root and % extract and how that applies to real life results.
As for the GTE, I don't know if their is such a thing as taking too much of it. If you find a study that says taking too much is bad for one's health, I'd like to know. I'm only taking 630 mg per day now (one 315 mg capsule twice per day).
Again, be careful with these herbs and try to only take what is recommended on the bottle. I'm taking the minimum possible right now and it seems to be working fairly well. I have a lot of vellus hair growth exactly where my hair line used to be before I ever started the male pattern baldness process. However, it will take a few months to a year to know if this treatment will allow those hairs to turn terminal as I expect that they will need to go through a few cycles. If it doesn't work, at least all these antioxidants will be healthy for me.
So, be careful and if you have any problems, do not use these herbs anymore.
....the biotin, B6, and Vitamin E are all fine. Any excess of B6 is urinated out and biotin is absorbed as needed. Your vitamin E amount should be fine, as well.