I found out that using a high dosage of krill oil together with phosphatidyl serine has concentration enhancing properties. I use it against ADD. I find it working better then traditional meds. As a long time dexedrine user I really know what I am talking about. This is my dosage:
Sometimes I also take lecithin (which is cheaper then phosphatidyl serine, but not as calming).
People who don't have ADD might also use these supplements as a mind enhancing, concentration improving nootropic.
Remember: All these supplements are fats that originate from diet and body.
The brand krill oil is neptune krill oil (2 softgels = 1.0 g neptune krill oil/ NKO) and the brand phosphatidyl serine is Nature's Way.
After taking the phosphatidyl serine I feel the substances have concentration enhancing but also calming, relaxing properties.
How does it work:
The brain cells membrane is made of fat. One of these fats is phosphatidyl serine. Krill oil has DHA/EPA connected to phosphatidyl choline. This works as an anchor and enables more phosphatidyl serine to anchor to the cell membrane. More phosphatidyl serine improves the brain electral conduction and makes the electrical signals stronger, causing more neurotransmitters to be released. Something like that...