Caffeine
The Smooth Lift
Caffeine is the world's most familiar nootropic. The science is direct: it blocks adenosine, the molecule that builds up through the day and signals fatigue. Less adenosine signal, more alertness.
Not all caffeine is the same. Most energy drinks and pre-workouts use synthetic caffeine, the cheapest form. DayShift uses caffeine from green tea leaf extract, naturally paired with antioxidants like EGCG and gentler on the stomach than coffee.
How Caffeine Works
Caffeine is one of the most studied compounds in nutritional science. Four mechanisms explain how it works.
1.Blocks adenosine.
Caffeine fits into adenosine receptors in the brain. Adenosine is the molecule that builds up through the day and signals tiredness. When caffeine blocks it, alertness comes through.
2.Supports dopamine signaling.
Caffeine has been studied for its role in supporting healthy dopamine activity. Dopamine is the neurotransmitter behind motivation and focus.
3.Supports the release of catecholamines.
Caffeine supports the release of norepinephrine and related molecules involved in alertness, attention, and physical energy.
4.Pairs naturally with L-theanine.
Caffeine's effects are most studied when paired with L-theanine at a 2:1 ratio. Together, they support focus and energy without the overstimulation that can come with caffeine alone. More on this below.
Summarized from published research on caffeine and cognitive performance.
The Pairing
Caffeine + L-Theanine
L-Theanine to Caffeine
Caffeine on its own produces alertness, but at higher doses it can produce jitters and a crash. L-theanine is an amino acid studied for promoting alpha brain wave activity, the calm-focused state.
Paired at a 2:1 ratio (L-theanine to caffeine), the combination has been studied for faster reaction times, better attention accuracy, and fewer of the over-stimulation effects caffeine can cause alone.
DayShift uses exactly that ratio: 120 mg of caffeine, 240 mg of L-theanine, every packet.
Why We Use It
Caffeine isn't the forefront of DayShift. It's the catalyst. Green tea caffeine delivers a smoother lift than synthetic, and the 2:1 pairing with L-theanine reduces jitters and energy spikes.
The other nootropics carry the cognitive benefits. Caffeine's role is to activate the formula and let them do their work.
Key Focus Areas
- Acute Focus
- Daily Alertness
- Clean Energy
How Our Dose Stacks Up.
A clinically studied dose, delivered daily.
DayShift caffeine is from green tea leaf extract, not synthetic.
Want to Learn More?
Explore the peer-reviewed research on caffeine and the L-theanine pairing.
Haskell et al. RCT comparing L-theanine alone, caffeine alone, and the combination. The combined group showed faster reaction time and improved sentence verification accuracy versus caffeine alone.
Read on PubMed →Owen et al. The L-theanine and caffeine combination improved attention-switching speed and accuracy at 60 minutes and reduced susceptibility to distracting information.
Read on PubMed →Payne et al. Systematic review and meta-analysis of 50 RCTs. Theanine plus caffeine produced small-to-moderate improvements in reaction time, attention, and digit vigilance accuracy.
Read on PubMed →Make The Shift Today.
120 mg of caffeine, 240 mg of L-theanine, and clinically studied doses of six other ingredients in every packet.
Try it risk-free. Complete your first 10 servings and don't feel a difference? We'll refund you completely.
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