Baby, vinpocetine and hydergine helps oxidation of brain cells.
It's not dopaminergic, so it doesn't stimulate, or motivate you, but it does help cognition.
I think you should go with a vinpocitine or hydergine supplement.
Here is info on Hydergine.
It's a very safe memory supplement.
Hydergine stimulates oxygen flow to the brain, relieving symptoms of deteriorating mental capacity
Hydergine is an ergoloid mesylate (derived from rye) and it has become one of the world's most useful and por ‘smart drugs’. It is known to have all the following effects:
Increase blood supply to the brain.
Increase oxygen delivered to the brain.
Enhance metabolism of brain cells.
Protect the brain from insufficient oxygen supply.
Slow the deposit of the age pigment lipofuscin in the brain.
Prevent free radical damage to brain cells.
Increase intelligence, memory, learning and recall.
Oxygen and the brain
Either too much or too little oxygen can upset the balance and generate the production of free radicals, which in turn can lead to aging. One of the major ways in which oxygen generates free radicals is its reaction with unsaturated fats, a process called peroxidation. Brain cells contain more unsaturated fats than any other part of the body, therefore it is our brains that are most susceptible to peroxidation.
Dosage:
Usual dosages are 2.25mg to 9mg daily, but always build up the doses slowly. We offer hydergine in 4.5mg tablets (which are scored so that half a tablet or 2.25mg can be taken). We also offer a more easily absorbed liquid hydergine, which provides precise titration because dosages of 0.5mg increments can be taken. liquid hydergine is also less likely to cause any stomach upset.