L-tyrosine is an amino acid precursor to dopamine that enhances cognitive focus at dosages between 500 and 1,000 milligrams

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L-theanine is an amino acid found in green tea that attenuates caffeine-induced autonomic stimulation without reducing cognitive focus

Alpha-yohimbine, also known as rauwolscine, acts on the adrenergic system to stimulate alertness and promote fat loss

Alpha-GPC functions as a choline donor that acts directly on acetylcholine neurotransmitter pathways to heighten focus

Supplementation with 300 to 600 milligrams of Alpha-GPC increases mental focus without inducing caffeine-like jitteriness

In sleep-deprived subjects, a single high dose of creatine improved cognitive processing capacity and short-term memory

Alpha-GPC is a cholinergic supplement that supplies choline across the blood-brain barrier for the synthesis of acetylcholine

Cognizin is a patented branded form of citicoline used to support cognitive function and acetylcholine production

The cognitive shuffling method involves choosing a random word and then visualizing a new, unrelated word for each letter of the initial word

Cognitive shuffling is a mental technique used to help a person fall back asleep after waking up

Due to severe short-term memory problems, former NFL player George Visger must write everything down in a notebook to function

A single embarrassing social mistake can become the dominant memory of an otherwise positive event

When a person is in a negative emotional state, their brain tends to automatically recall negative memories of past regrets or social blunders

Rats given ad libitum access to a sugar solution during adolescence show hippocampal-dependent memory deficits as adults

Consuming a non-nutritive sweetener like stevia does not produce the same acetylcholine release pattern in the hippocampus as consuming caloric food

In rodents, exercise can reverse the memory deficits caused by a Western diet

Vagal nerve stimulation devices have been shown to rescue memory impairments caused by an unhealthy diet in animal models

Reintroducing the bacteria Lactococcus was able to reverse memory impairments in rats fed a heat-treated diet

Rats fed a junk food diet during development show memory impairments that persist even after they are switched to a healthy diet

In an unpublished study, rats consuming a diet enriched with advanced glycation end products (AGEs) during development showed memory impairments as adults

Memory deficits from adolescent sugar consumption in rats can persist into adulthood even after the sugar is removed from their diet