Energy + Focus
ZHOU
Energy + Focus
4.1
★ ★ ★ ★ ★
(234 ratings)
Theanine 200 mg
Caffeine 100 mg
Score 92.0
An excellent and well-balanced L-Theanine and Caffeine blend (2:1 ratio) for smooth energy and enhanced focus, highly regarded for minimizing jitters and crashes.
Quantity: 60 Capsule(s)Servings size: 1 Vegetable Capsule(s) (60 servings)
Selected goals:
Other goals:
Stress Relief
Mental Focus
Brain Health
Mood Support
Sleep Support
leaderboard Score 92.0
An excellent and well-balanced L-Theanine and Caffeine blend (2:1 ratio) for smooth energy and enhanced focus, highly regarded for minimizing jitters and crashes.
insights Analysis
This product features a classic and highly effective nootropic stack: 100mg of natural caffeine (sourced from Coffea arabica and Coffea canephora) and 200mg of L-Theanine. This specific 1:2 caffeine-to-theanine ratio is widely praised by nutritionists and cognitive enhancement communities for its ability to promote a state of 'calm alertness.' The L-Theanine counteracts the harsher stimulant effects of caffeine, smoothing out the energy curve and enhancing focus without anxiety or a subsequent crash. Online reviews consistently highlight its efficacy for sustained energy, improved concentration, and reduced jitters, making it a reliable daily supplement for productivity and mental performance. It excels in its core purpose but does not offer broader benefits like significant metabolism boosting or complex brain health support beyond its primary nootropic effects.
- Optimal 1:2 caffeine to L-Theanine ratio delivers smooth, sustained energy and enhanced focus.
- Significantly reduces caffeine-related jitters, anxiety, and post-caffeine crash.
- Utilizes natural caffeine sources, preferred by many users.
- Good value per serving for a quality C+T blend.
- Caffeine dose (100mg) might be too low for individuals with high caffeine tolerance.
- Formula is quite simple, lacking additional ingredients for broader cognitive or metabolic support.
- Not suitable for evening use due to caffeine content interfering with sleep.
- Contains caffeine; avoid consumption close to bedtime to prevent sleep disturbances.
- Individuals sensitive to caffeine should start with a lower dose to assess tolerance.
$20.89($0.34 per serving)
 iHerb | $ 20.89 | |
 Vitacost | $ 20.89 | |
 Pure Formulas | $ 20.95 | |
 Daily Vita | $ 24.00 |
bolt Effectiveness for goals
Yes, L-Theanine is commonly used to smooth out the stimulating effects of caffeine. It can significantly reduce the perceived anxiety, nervousness, and jitters that some individuals experience from caffeine. This interaction helps achieve a more balanced stimulant effect.
The combination of L-Theanine and caffeine is often reported to enhance cognitive performance more effectively than caffeine alone. L-Theanine can synergistically improve attention and reaction time, while counteracting some of caffeine's potential negative effects. This leads to a state of focused alertness.
The combination of L-Theanine and caffeine is often studied for its synergistic effects, where L-Theanine may mitigate some of the negative side effects of caffeine, such as jitters and anxiety, while enhancing its cognitive benefits. This combination can lead to improved alertness, focus, and attention without increased perceived stress. Theanine's calming effect can smooth out the stimulatory effects of caffeine.
When combined, L-Theanine can help to refine the focus provided by caffeine, leading to sustained attention without overstimulation. It helps to maintain a state of calm alertness, allowing for better concentration on tasks. This combination is often favored for productivity.
Caffeine primarily functions as a central nervous system stimulant, blocking adenosine to promote wakefulness. Many studies show it can significantly increase alertness and decrease feelings of fatigue. Its effects typically become noticeable within 15-60 minutes after consumption.
schedule Dosage, timing & forms
For most healthy adults, a daily caffeine intake up to 400 mg is generally considered safe and not associated with adverse effects. However, pregnant women, individuals with certain health conditions, or those sensitive to caffeine may need to consume less. This guideline helps prevent potential negative impacts.
A typical single dose of caffeine for an energy boost ranges from 50 to 200 mg. Individual tolerance varies significantly, so starting with a lower dose is often recommended. High doses can lead to adverse effects.
A commonly studied and used ratio for combining L-Theanine and caffeine is 2:1, meaning 200 mg of L-Theanine for every 100 mg of caffeine. This ratio is often cited as effective for achieving enhanced focus and alertness with reduced side effects. However, individual preferences and sensitivities may vary.
Common doses of L-Theanine for promoting relaxation and focus range from 100 to 200 mg, taken as needed. Some studies use doses up to 400 mg in a single serving. Individual responses can vary.
Caffeine's effects usually begin within 30-60 minutes and can last for several hours. To maximize alertness during the day, it's often consumed in the morning or early afternoon. Avoid taking it too close to bedtime to prevent sleep disruption.
health_and_safety Safety & interactions
Yes, caffeine and L-Theanine are often consumed together, and studies suggest they interact synergistically. L-Theanine is thought to modulate some of caffeine's stimulating effects, potentially leading to a "calm alertness." This interaction is generally considered beneficial for cognitive performance and mood.
Moderate caffeine intake is generally considered safe for most pregnant or breastfeeding individuals, but limits are often recommended. High intake may be associated with certain risks. It's best to discuss caffeine consumption with a doctor during these periods.
Common side effects include nervousness, restlessness, insomnia, increased heart rate, and stomach upset. These effects are often dose-dependent and vary among individuals. Sensitive individuals may experience these symptoms even at lower doses.
High doses of caffeine can lead to various side effects including nervousness, restlessness, insomnia, increased heart rate, and gastrointestinal upset. In sensitive individuals or with very high intake, it can also cause anxiety, tremors, and headaches. Regular high consumption can lead to physical dependence and withdrawal symptoms upon cessation.
Signs of excessive caffeine intake, sometimes called "caffeine intoxication," include anxiety, tremors, rapid heart rate, stomach pain, and difficulty sleeping. In severe cases, it can lead to more serious symptoms. Individual sensitivity plays a role in these reactions.
Ingredients
| Ingredient | Amount per serving |
|---|---|
| L-Theanine | 200 mg |
| natural Caffeine (Coffee arabica, Coffea canephora, Caffeine Anhydrous) | 100 mg |
Categories
Theanine 95.0
The 200mg L-Theanine dose, in a 2:1 ratio to caffeine, is optimal for promoting calm focus, mitigating caffeine's harsher effects, and enhancing cognitive synergy.
Caffeine 85.0
The 100mg of natural caffeine provides a moderate yet effective energy boost, well-integrated to avoid overstimulation.
Goals
Mental Focus 95.0
The synergistic effect of L-Theanine and caffeine is exceptional for enhancing mental clarity, attention span, and sustained focus without distraction, making it highly effective for cognitive tasks.
Energy 90.0
The 100mg of natural caffeine provides a noticeable energy lift, which is well-sustained and free from harsh peaks and crashes due to the balanced L-Theanine content.
Productivity Boost 90.0
By fostering a state of calm alertness and sustained concentration, the product directly supports improved productivity for work, study, or any mentally demanding activity.
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