Theanine

Description

Theanine is a unique amino acid that is a derivative of glutamic acid and is most prominently found in green and black tea leaves. Unlike other amino acids, L-Theanine is not commonly incorporated into proteins. Its primary mechanism involves crossing the blood-brain barrier to influence brain activity, particularly by increasing alpha brain wave activity, which is associated with a state of 'wakeful relaxation'. By modulating neurotransmitters such as GABA, dopamine, and serotonin, Theanine helps to reduce feelings of stress and anxiety while improving focus and concentration. This leads to a state of calm alertness, making it a popular supplement for those seeking to enhance cognitive performance and manage daily stressors without the sedative effects often associated with other relaxation aids. Often consumed in tea or as a dietary supplement, Theanine is also valued for its potential to improve sleep quality by promoting relaxation before bedtime. It is generally well-tolerated with a low incidence of side effects, making it a safe choice for many individuals looking to support mental well-being and cognitive function.

Sources
Green tea (Camellia sinensis)Black tea (Camellia sinensis)Some mushrooms (e.g., Bay Bolete)
Cheapest Theanine supplements
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Optimal Dosage
Minimum100 mg
Maximum400 mg
Safety & Toxicity
Goals
Cognitive Support
Cognitive Support
Impact
High effect
Typical dose:100–400 mg
Found in green tea, L-Theanine is an amino acid that modulates neurotransmitters like GABA and dopamine. It is highly effective at taking the 'edge' off stimulants like caffeine, resulting in smooth, focused energy and reduced anxiety.
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Mental Focus
Mental Focus
Impact
High effect
Typical dose:100–400 mg
Found primarily in green tea, L-Theanine modulates neurotransmitters like dopamine and GABA. It provides a non-drowsy relaxation effect that can mitigate the jitteriness of caffeine, leading to a synergistic improvement in smooth, sustained mental focus.
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Productivity Boost
Productivity Boost
Impact
High effect
Typical dose:100–400 mg
L-Theanine is an amino acid that can cross the blood-brain barrier and increase alpha brain wave activity, which is associated with a state of 'relaxed wakefulness'. It can modulate neurotransmitters like GABA and dopamine, improving focus and attention without sedation.
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Sleep Support
Sleep Support
Impact
High effect
Typical dose:100–400 mg
L-Theanine, an amino acid found in green tea, is known for its ability to induce a state of 'calm alertness' by increasing alpha brain wave activity. It helps quiet a racing mind and reduces stress, addressing common barriers to falling asleep. It does not act as a sedative but rather facilitates the transition into sleep.
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Stress Relief
Stress Relief
Impact
High effect
Typical dose:100–400 mg
This amino acid, commonly found in green tea, can cross the blood-brain barrier and influence neurotransmitter levels. It enhances GABA, serotonin, and dopamine, leading to a quick-acting reduction in mental and physical stress while improving focus.
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Product stats
Price per product
Average$22.31
Median$19.97
Price per serving
Average$0.57
Median$0.54
Price per 100 mg
Average$0.62
Median$0.52
Price distribution
Price per serving distribution
Price per 100 mg
Reference amount: 100 mg
Forms
Paired ingredients