grape seed

I am taking astaxanthin, fish oil, holy basil and grape seed extract three times a day. This calms me down for the most part. Can I add l-theanine to this? I am hoping it will help me sleep. Thank you.

Recently bought 8 pints (12oz) of blueberries on sale, $4.99 a pint, buy one get one free. Here's another article on the benefits.