🟢 90/100

This product looks safe

  • Contains proprietary blend — exact ingredient amounts not disclosed
  • 50% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Safety Alerts

ℹ️ Contains proprietary blend — exact ingredient amounts not disclosed

Label Data

2 fl. Oz. Serving Size
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Calories
20 mg (100% DV)
✅ 1.4× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 20mg UL 35mg
40 mg (2000% DV)
📊 30.8× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 40mg UL 100mg
400 mcg (100% DV)
✅ Within RDA (1.0× RDA of 0.4 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 0.4mg UL 1.0mg
500 mcg (8333% DV)
📊 208.3× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.5mg
Sodium
10 mg (1% DV)
PROPRIETARY ENERGY BLEND
2200 mg
ENZYME BLEND
1 mg

Other Ingredients

filtered Water Natural and Artificial flavors Potassium Sorbate Sodium Benzoate Sucralose FD&C Red #40 FD&C Blue #1

Label Claims — Verification

All Other
Structure/Function
All Other (97% of products) Structure/Function (86% of products) Nutrient (36% of products)

Target Groups

Adult (18 - 50 Years) Sugar Free

Product Information

📋 Directions for Use

TEAR AT DOTTED LINE

⚠️ Warnings & Precautions

Energy to Burn Taste You'll Love

TAMPER EVIDENT Do not use if seal is broken.

WARNING: CONTAINS ABOUT AS MUCH CAFFEINE AS A CUP OF PREMIUM BREWED COFFE. LIMIT OR AVOID PRODUCTS CONTAINING CAFFEINE TO AVOID JITTERS, SLEEPLESSNESS AND RAPID HEARTBEAT. STACKER 2(R) ENERGY SHOT CONTAINS NIACIN (AS NIACINAMIDE) SO SOME PEOPLE MAY EXPERIENCE A FLUSH FEELING, HOT SENSATION OR REDNESS OF SKIN THAT LASTS FOR A FEW MINUTES. NOT FOR USE BY CHILDREN, PREGNANT WOMEN OR INDIVIDUALS SENSITIVE TO CAFFEINE. DO NOT CONSUME MORE THAN 1 SHOT EVERY 6 HOURS.

🧪 Formulation Notes

DIETARY SUPPLEMENT

ZERO CALORIES ZERO SUGAR

PHENYLKETONURICS: CONTAINS PHENYLALANINE.

Additional Information

RESULTS MAY VARY

NO REFRIGERATION NECESSARY. DISPOSE OF UNUSED SHOT.

PART# 4060

Product Details

UPC / SKU 8 78114 00795 2
DSLD Entry Date 2013-03-25
Product Type Other Combinations
Form Liquid
Brand Stacker 2
DSLD ID 19297
Data Updated 2026-04-11

Research Evidence

241 Research Sources
55 Avg Quality Score
113 Meta Analysis
75 Systematic Review
32 Rct
11 Clinical Trial
3 Other
3 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Openfda Safety
A Niacin for primary and secondary prevention of cardiovascular events
Meta Analysis The Cochrane database of systematic reviews 2017
A Use of high potency statins and rates of admission for acute kidney injury: multicenter, retrospective observational analysis of administrative databases
Meta Analysis BMJ (Clinical research ed.) 2013
A Effect on cardiovascular risk of high density lipoprotein targeted drug treatments niacin, fibrates, and CETP inhibitors: meta-analysis of randomised controlled trials including 117,411 patients
Meta Analysis BMJ (Clinical research ed.) 2014
A A terminal metabolite of niacin promotes vascular inflammation and contributes to cardiovascular disease risk
Meta Analysis Nature medicine 2024
A Meta-analysis and imputation refines the association of 15q25 with smoking quantity
Meta Analysis Nature genetics 2010
A Genome-wide meta-analyses identify multiple loci associated with smoking behavior
Meta Analysis Nature genetics 2010
A Antidepressants for smoking cessation
Meta Analysis The Cochrane database of systematic reviews 2014
A Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne
Meta Analysis The Cochrane database of systematic reviews 2020
B Assessment of the Role of Niacin in Managing Cardiovascular Disease Outcomes: A Systematic Review and Meta-analysis
Meta Analysis JAMA network open 2019
B Association Between Lowering LDL-C and Cardiovascular Risk Reduction Among Different Therapeutic Interventions: A Systematic Review and Meta-analysis
Meta Analysis JAMA 2016
View all evidence for Niacin →

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