Performance Lab Caffeine 2
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Performance Lab Caffeine 2 falls short.
A low-dose caffeine capsule from Performance Lab: 50mg natural caffeine with 100mg L-theanine (a 2:1 ratio), 250mg L-tyrosine and four B-vitamins, with every dose on the label. It is a narrow energy-and-focus formula rather than a full nootropic stack, and one capsule sits below the caffeine and tyrosine ranges in our dosing audit; the label suggests 1-2 capsules.
What it does
Performance Lab Caffeine 2 is a stimulant capsule sold through performancelab.com (operated by Performance Lab USA Corp., Winter Park, Florida). Each vegan pullulan capsule holds 50mg natural caffeine from Coffea robusta seeds, 100mg L-theanine, 250mg L-tyrosine and NutriGenesis vitamins B2, B6, folate and B12; a bottle holds 30 capsules. The label suggests 1-2 capsules on an empty stomach, up to a maximum of 5 capsules (250mg caffeine) a day. US orders ship from the brand's New Jersey fulfilment centre (per performancelab.com's shipping page, checked 2026-10-05).
How it works
Caffeine blocks adenosine receptors, which dulls fatigue signals and raises alertness. L-theanine, an amino acid found in tea, is added at a 2:1 ratio to caffeine; Performance Lab cites human trials of theanine-plus-caffeine combinations for this pairing, but Caffeine 2 itself has not been tested in a published trial. L-tyrosine is a building block of dopamine and noradrenaline, and the vendor includes it to support the neurotransmitters that caffeine draws on. The four B-vitamins (B2, B6, folate, B12) supply 38-83% of the US Daily Value per capsule.
What to expect
Performance Lab says Caffeine 2 starts working in around 15-30 minutes. One capsule gives 50mg caffeine; two capsules (100mg caffeine, 200mg L-theanine, 500mg L-tyrosine) bring all three actives into the ranges used in our dosing audit. Count it toward your daily caffeine intake. Standard US shipping takes 4-8 business days and costs $9.95, free over $100 and on subscriptions (per performancelab.com's shipping page, checked 2026-10-05). The price is $44 one-time, $39.60 a month on a monthly subscription or $33.00 a month on the 4-month plan.
Hero ingredients
- Caffeine50mg
- L-Theanine100mg
- L-Tyrosine250mg
Who it's for
- Every dose disclosed on the label, no proprietary blend
- 2:1 L-theanine to caffeine ratio
- 50mg caffeine per capsule lets you adjust intake in small steps (label maximum 5 a day)
Who should skip
- Only 50mg caffeine per capsule, below the 75mg low end of our caffeine range
- L-tyrosine (250mg) sits below the 300-500mg range
- No published trial of Caffeine 2 itself; the evidence is for its ingredients
Dosing audit
| Ingredient | Label | Clinical | Status |
|---|---|---|---|
| Natural Caffeine (Coffea robusta) | 50mg | 75-200mg | ✕ Under |
| L-Theanine | 100mg | 100-200mg | ✓ Pass |
| L-Tyrosine | 250mg | 300-500mg | ✕ Under |
| Riboflavin (Vitamin B2) | 500mcg | 1.3mg (DV) | ✕ Under |
| Vitamin B6 | 750mcg | 1.3-2mg | ✕ Under |
| Folate (Vitamin B9) | 170mcg DFE | 400mcg | ✕ Under |
| Vitamin B12 | 2mcg | 2.4mcg | ✕ Under |
Ingredient quality
Number and quality of evidence-graded ingredients. Trademarked extracts and standardized actives raise this score.
Dosing vs. clinical evidence
How many ingredients meet their clinical-trial dose. Underdosing flagship actives is the biggest score deduction.
Formula transparency
Full disclosure of every ingredient at its exact dose. Proprietary blends are scored as opaque.
Value for money
Cost per month relative to per-serving clinical doses delivered. Cheaper products with underdoses score lower.
Brand trust
Brand reputation, third-party testing, refund track record, and Trustpilot signal across multiple years.
How the score is computed
Each pillar is weighted by editorial importance. Weights are constant across every brand we audit — they're not adjusted to favour any particular product.
- Ingredient quality25%
- Dosing vs. clinical evidence30%
- Formula transparency20%
- Value for money15%
- Brand trust10%
14 verified reviews
We don't embed cherry-picked quotes here. Trustpilot is the canonical source — the score above feeds into our Trust pillar.
Read all 14 reviews on Trustpilot →Subscribe & save
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- 30-day money-back guarantee
- Cancel anytime
- Free shipping
Buy a single bottle
- No subscription commitment
- 30-day money-back still applies
- Faster delivery if in stock
- Higher per-bottle price than subscription
The fine print
Full refund if you're not satisfied. Brand-direct guarantee, not Amazon's.
We score every brand on cancellation friction. Auto-deduct from the Trust pillar if you have to email to cancel.
We earn a commission if you buy through links on this page, at no extra cost to you. Our scores and rankings follow our published methodology; commissions do not influence them.
Buying in the United States
- Local price
- $44/month
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Health disclaimer
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Information on this page is for educational purposes only and is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you are pregnant, nursing, taking medication, or have a medical condition. Individual results vary.