The Science

Engineered for Sustained Cognition

Every ingredient in VĒSĀ is clinically dosed, peer-reviewed, and fully transparent. No proprietary blends. No marketing myths. Just pharmacology that works.

Active Ingredients

150mg

Rhodiola Rosea

100mg

Natural Caffeine

Sugar

Active Ingredients

150mg

Rhodiola Rosea

100mg

Natural Caffeine

Sugar

The Synergy

The Accelerator and The Brake

Caffeine: The Accelerator

100mg of natural caffeine blocks adenosine receptors — the molecules that make you feel drowsy. This increases dopamine and norepinephrine availability, sharpening alertness and reaction time. But caffeine alone triggers cortisol — the stress hormone that causes jitters and the inevitable crash.

Rhodiola: The Brake

150mg of Rhodiola Rosea extract (standardized to 3% rosavins, 1% salidroside) modulates the HPA axis — your body's central stress response system. It dampens excessive cortisol production while preserving the alertness signal. The result: wakefulness without anxiety.

Together, they produce a state of relaxed wakefulness — the cognitive sweet spot where focus is sharp but stress is low. Clinical studies show adaptogens paired with stimulants extend productive focus and reduce perceived mental fatigue.

Energy & Focus Over Time

Traditional Energy Drink

VĒSĀ Flow State

Time4 Hours

The Timeline

What Happens After You Drink VĒSĀ

0 – 15 minActivation

Caffeine enters the bloodstream and begins binding to adenosine receptors. B-vitamins activate metabolic pathways, priming mitochondria for ATP production. The first wave of alertness begins.

15 – 45 minPeak Alertness

Caffeine reaches peak plasma concentration, blocking adenosine and boosting dopamine. Simultaneously, Rhodiola's salidroside begins modulating cortisol, preventing the stress response that causes jitters.

45 min – 2hSustained Flow State

Rhodiola's rosavins fully engage the HPA axis, maintaining relaxed wakefulness. Blood glucose stays stable — zero sugar means no glycemic dips. This is the deep work window.

2 – 4hGentle Offset

Energy tapers gradually as caffeine is metabolized. No crash, no withdrawal. Rhodiola continues buffering residual cortisol, ensuring a smooth return to baseline.

0 – 15 minActivation

Caffeine enters the bloodstream and begins binding to adenosine receptors. B-vitamins activate metabolic pathways, priming mitochondria for ATP production. The first wave of alertness begins.

15 – 45 minPeak Alertness

45 min – 2hSustained Flow State

Rhodiola's rosavins fully engage the HPA axis, maintaining relaxed wakefulness. Blood glucose stays stable — zero sugar means no glycemic dips. This is the deep work window.

2 – 4hGentle Offset

Energy tapers gradually as caffeine is metabolized. No crash, no withdrawal. Rhodiola continues buffering residual cortisol, ensuring a smooth return to baseline.

The Ingredients

Four Ingredients. Full Transparency.

Rhodiola Rosea

150mg per can

Standardized to 3% rosavins, 1% salidroside

How It Works

Rhodiola Rosea is an adaptogenic herb native to arctic regions of Europe and Asia. Its active compounds — rosavins and salidroside — modulate the hypothalamic-pituitary-adrenal (HPA) axis, your body's central stress response system. By regulating cortisol production, Rhodiola prevents the excessive stress response that caffeine typically triggers, while also supporting serotonin and dopamine activity in the brain.

What The Research Says

A double-blind, crossover study of 56 physicians found Rhodiola extract significantly reduced mental fatigue scores during stressful night duty periods, with improved cognitive test performance.

Darbinyan et al., Phytomedicine, 2000

In a trial of 161 military cadets, Rhodiola supplementation improved cognitive function under stress — including associative thinking, short-term memory, and concentration — with a statistically significant anti-fatigue effect.

Shevtsov et al., Phytomedicine, 2003

A 28-day double-blind RCT of 60 burnout patients showed Rhodiola significantly improved fatigue symptoms, attention, and cortisol response to awakening stress compared to placebo.

Olsson et al., Planta Medica, 2009

20%

reduction in mental fatigue scores

Darbinyan et al., 2000

Caffeine

100mg per can

Caffeine anhydrous

How It Works

Caffeine is a xanthine alkaloid that works by blocking adenosine A1 and A2A receptors in the brain. Adenosine is a neurotransmitter that accumulates during waking hours and promotes sleepiness. By blocking its receptors, caffeine increases the availability of dopamine and norepinephrine — producing heightened alertness, faster reaction time, and improved concentration. At 100mg (≈1.3 mg/kg), you get optimal cognitive benefits without the cortisol spike and jitters of higher doses.

Why 100mg?

Research shows cognitive benefits follow an inverted-U curve: too little has no effect, too much triggers cortisol spikes and anxiety. 100mg sits in the optimal zone — enough to block adenosine and boost dopamine, without the jitters or crash of 200-300mg doses found in most energy drinks.

What The Research Says

A comprehensive review found that low-to-moderate caffeine doses consistently improve alertness, vigilance, attention, and reaction time across multiple cognitive domains.

McLellan et al., Neuroscience & Biobehavioral Reviews, 2016

Review of caffeine as a cognitive enhancer confirmed consistent benefits for attention and reaction time at moderate doses, with diminishing returns and adverse effects at higher doses.

Nehlig, Journal of Alzheimer's Disease, 2010

Meta-analysis demonstrated caffeine acutely enhances attention, improving both reaction time and accuracy in the general population.

Einöther & Giesbrecht, Psychopharmacology, 2013

75mg+

EFSA-approved threshold for alertness claims

EU Regulation No 432/2012

Vitamin B-Complex

B3, B6, B9, B12

100% Daily Value per can

How It Works

B-vitamins are essential cofactors for mitochondrial ATP production — the primary energy currency of your cells. Vitamin B6 (pyridoxal 5'-phosphate) alone is a cofactor for over 140 enzyme-catalyzed reactions, including the synthesis of dopamine, serotonin, GABA, and norepinephrine. B12 is critical for methylation and homocysteine metabolism. Niacin (B3) is required for NAD+ production, the molecule that powers cellular energy transfer. Folic acid (B9) contributes to normal psychological function and plays a key role in amino acid synthesis and cell division.

What The Research Says

A comprehensive review established that B-vitamins play critical roles in brain energy production, neurotransmitter synthesis, and DNA/RNA maintenance. Supplementation with broader B-vitamin complexes shows efficacy for cognitive and psychological functioning.

Kennedy, Nutrients, 2016

High-dose B6 supplementation reduced self-reported anxiety and strengthened visual surround suppression — indicating increased GABA activity, the brain's primary inhibitory neurotransmitter.

Field et al., Human Psychopharmacology, 2022

A systematic review and meta-analysis found high-certainty evidence that B-vitamin supplementation (B6, B9, B12) benefits global cognitive function.

Nutrition Reviews, 2024

140+

enzyme reactions requiring B6 as cofactor

Kennedy, 2016

Zero Sugar

0g per can

No glucose, no sucrose, no HFCS

How It Works

Sugar causes rapid blood glucose spikes followed by insulin-driven crashes — directly impairing sustained cognitive performance. Glycemic variability disrupts attention, working memory, and mood stability. By eliminating sugar entirely, VĒSĀ delivers clean energy without the metabolic rollercoaster. A trace amount of sucralose provides taste balance without affecting blood glucose or insulin levels.

What The Research Says

Research demonstrated that glucoregulation is directly linked to cognitive performance across the adult lifespan — better blood sugar stability correlates with better attention and executive function.

Mantantzis et al., Psychoneuroendocrinology, 2019

A randomized crossover trial showed high-glycemic diets were associated with significantly more fatigue and depressive symptoms compared to low-glycemic alternatives.

Breymeyer et al., Nutrients, 2016

sugar means zero glycemic impact

No glucose spikes, no insulin crash

Clinical Evidence

Peer-Reviewed. Published. Replicated.

Every ingredient claim in VĒSĀ is backed by published clinical research. Here are the key studies.

Phytomedicine2000

Darbinyan et al.

Rhodiola extract significantly reduced mental fatigue during stressful night duty in physicians

n = 56

Phytomedicine2003

Shevtsov et al.

Rhodiola improved cognitive function — associative thinking, short-term memory — under stress conditions in military cadets

n = 161

Planta Medica2009

Olsson et al.

28-day Rhodiola supplementation improved fatigue symptoms and reduced cortisol awakening response in burnout patients

n = 60

Neuroscience & Biobehavioral Reviews2016

McLellan et al.

Low-to-moderate caffeine doses improve alertness, vigilance, attention, and reaction time across cognitive domains

Systematic review

Journal of Alzheimer's Disease2010

Nehlig A.

Caffeine consistently enhances attention and reaction time at moderate doses, with diminishing returns above 400mg

Comprehensive review

Nutrients2016

Kennedy DO.

B-vitamins play critical roles in brain energy, neurotransmitter synthesis, and DNA maintenance. Supplementation improves cognitive and psychological functioning

Systematic review

Psychoneuroendocrinology2019

Mantantzis et al.

Blood glucose regulation directly linked to cognitive performance across the adult lifespan

Cross-sectional study

Phytotherapy Research2015

Cropley et al.

Rhodiola supplementation reduced self-reported anxiety, stress, anger, and confusion while improving total mood

n = 80

The Comparison

VĒSĀ vs. The Alternatives

See how VĒSĀ stacks up against what you're probably drinking now.

	VĒSĀ	Energy Drink	Black Coffee
Caffeine Content	100mg (optimized)	150–300mg	~95mg (variable)
Sugar	0g	27–54g	0g
Adaptogens	150mg Rhodiola	None	None
Crash Risk	Minimal	High	Moderate
Jitter Risk	Minimal	High	Moderate
Sustained Focus	4+ hours	1–2 hours	2–3 hours
B-Vitamins	Full Complex	Some	None
Full Disclosure	Every mg listed	Proprietary blends	N/A

Full Transparency

No Proprietary Blends. Ever.

Many energy drink brands hide behind "proprietary blends" — a legal loophole that lets them list ingredients without disclosing amounts. You could be getting 5mg of an ingredient they market as a key feature. You'd never know.

Every milligram in VĒSĀ is accounted for. What you see is what you get.

VĒSĀ Active Ingredients

Serving Size: 1 can (330ml)

Rhodiola Rosea Extract

3% rosavins, 1% salidroside

150mg

Caffeine

caffeine anhydrous

100mg

Niacin (B3)

100% DV

16mg

Folic Acid (B9)

40% DV

80μg

Vitamin B6

100% DV

1.4mg

Vitamin B12

100% DV

2.5μg

Sugar

If a brand won't tell you exactly how much of each ingredient is in their product — ask yourself why.

References

1Darbinyan V, Kteyan A, Panossian A, et al. Rhodiola rosea in stress induced fatigue — A double blind cross-over study of a standardized extract SHR-5. Phytomedicine. 2000;7(5):365-371.
2Shevtsov VA, Zholus BI, Shervarly VI, et al. A randomized trial of two different doses of a SHR-5 Rhodiola rosea extract versus placebo and control of capacity for mental work. Phytomedicine. 2003;10(2-3):95-105.
3Olsson EM, von Schéele B, Panossian AG. A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract SHR-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. Planta Medica. 2009;75(2):105-112.
4McLellan TM, Caldwell JA, Lieberman HR. A review of caffeine's effects on cognitive, physical and occupational performance. Neuroscience & Biobehavioral Reviews. 2016;71:294-312.
5Nehlig A. Is caffeine a cognitive enhancer? Journal of Alzheimer's Disease. 2010;20(S1):85-94.
6Einöther SJL, Giesbrecht T. Caffeine as an attention enhancer: reviewing existing assumptions. Psychopharmacology. 2013;225(2):251-274.
7Kennedy DO. B Vitamins and the Brain: Mechanisms, Dose and Efficacy — A Review. Nutrients. 2016;8(2):68.
8Field DT, Cracknell RO, Eastwood JR, et al. High-dose Vitamin B6 supplementation reduces anxiety and strengthens visual surround suppression. Human Psychopharmacology. 2022;37(6):e2852.
9Mantantzis K, Schlaghecken F, Sünram-Lea SI, Maylor EA. Sugar rush or sugar crash? A meta-analysis of carbohydrate effects on mood. Neuroscience & Biobehavioral Reviews. 2019;101:45-67.
10Breymeyer KL, Lampe JW, McGregor BA, Neuhouser ML. Subjective mood and energy levels of healthy weight and overweight/obese healthy adults on high-and low-glycemic load experimental diets. Appetite. 2016;107:253-259.
11Cropley M, Banks AP, Boyle J. The Effects of Rhodiola rosea L. Extract on Anxiety, Stress, Cognition and Other Mood Symptoms. Phytotherapy Research. 2015;29(12):1934-1939.
12European Medicines Agency. Assessment report on Rhodiola rosea L., rhizoma et radix. EMA/HMPC/232091/2011. 2012.