🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 62% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

12 Gram(s) Serving Size
12 Servings
Other Combinations Product Type
62% Evidence Coverage

Supplement Facts — Evidence Check

Calories
45 Calorie(s)
Total Carbohydrates
1 Gram(s) (1% DV)
1.7 mg (131% DV)
✅ 1.3× RDA — within safe limits 📚 12 studies (Tier A: 0, B: 1)
RDA 1.3mg This product: 1.7mg
23 mg NE (144% DV)
✅ 1.6× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 23mg UL 35mg
7.2 mg (424% DV)
📊 5.5× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 7.2mg UL 100mg
167 mcg (6958% DV)
📊 69.6× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.167mg
7 mg (140% DV)
✅ 1.4× RDA — within safe limits 📚 1 studies — no high-quality reviews
RDA 5mg This product: 7mg
1.025 Gram(s)
📊 Market median: 500.0mg (180 products) 📚 5 studies (Tier A: 0, B: 1)
This product: 1.025mg
CarnoSyn
4 Gram(s)
3.4 Gram(s)
📊 Market median: 2000.0mg (275 products)
Median 2000.0mg This product: 3.4mg
200 mg
📊 Market median: 200.0mg (358 products) 📚 9 studies (Tier A: 0, B: 2)
This product: 200mg
📊 Market median: 180.0mg (239 products) 📚 43 studies (Tier A: 1, B: 19)
This product: 115mg UL 400mg
📊 Market median: 300.0mg (122 products) 📚 22 studies (Tier A: 0, B: 7)
This product: 100mg

Other Ingredients

Malic Acid Natural Flavors Silicon Dioxide Rebaudioside M Stevia Leaf Extract Spirulina

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (99% of products) Structure/Function (85% of products) Nutrient (48% of products) No Claim (1% of products)

Target Groups

Children 4 or More Years of Age Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Directions: Mix 1 stick pack with 12-16 fl oz of water. Stir and consume 15 minutes prior to training.

⚠️ Warnings & Precautions

No more than 2 servings per day.

Warning: May cause flushing and/or tingling. Contains 115mg of caffeine per serving.

Children under 12 years of age, pregnant women or nursing mothers, or anyone with a medical condition should consult with a physician before using this product.

Children under 12 years of age, pregnant women or nursing mothers, or anyone with a medical condition should consult with a physician before using this product.

🧪 Formulation Notes

Outperform your best

Level up your training with increased energy and focus! Created with science-based ingredients and clinical doses of L-Citrulline, L-Theanine, CarnoSyn Beta Alanine, and Rhodiola rosea to help you crush your workouts. This is the most advanced pre-workout, infused with XS Muscle Multiplier essential amino acid blend, caffeine, and a mega dose of B-vitamins to help you push further, gain strength, and build muscle.

Green Apple Naturally flavored Naturally sweetened 4.0 g Carnosyn Beta Alanine 3.4 g L-Citrulline 100 mg Rhodiola rosea

Free of gluten, dairy & soy

CarnoSyn Carnosine Synthesizer

Additional Information

XS Pre-Workout boost give you maximum power, so you get more out of your training and experience more!

Amway

Made in the USA Made in the USA with premium ingredients from around the globe

12- 0.4 oz (12g) stickpacks

Product Details

UPC / SKU 8 50029 60206 4
DSLD Entry Date 2025-04-24
Product Type Other Combinations
Form Powder
Brand XS
DSLD ID 328174
Data Updated 2026-04-11

Research Evidence

22 Research Sources
49 Avg Quality Score
8 Rct
4 Meta Analysis
4 Clinical Trial
3 Systematic Review
1 Cochrane Review
1 Regulatory Source
B Effect of vitamin B2, vitamin C, vitamin D, vitamin E and folic acid in adults with essential hypertension: a systematic review and network meta-analysis
Systematic Review BMJ open 2024
B Effect of Vitamin B2 supplementation on migraine prophylaxis: a systematic review and meta-analysis
Meta Analysis Nutritional neuroscience 2022
B Supplementary vitamin E, selenium, cysteine and riboflavin for preventing kwashiorkor in preschool children in developing countries
Systematic Review The Cochrane database of systematic reviews 2010
B Riboflavin supplements for blood pressure lowering in adults.
Cochrane Review The Cochrane database of systematic reviews
B Associations of dietary vitamin B1, vitamin B2, vitamin B6, and vitamin B12 with the risk of depression: a systematic review and meta-analysis
Meta Analysis Nutrition reviews 2022
C Prophylaxis of migraine headaches with riboflavin: A systematic review
Systematic Review Journal of clinical pharmacy and therapeutics 2017
C Medium-dose riboflavin as a prophylactic agent in children with migraine: a preliminary placebo-controlled, randomised, double-blind, cross-over trial
Rct Cephalalgia : an international journal of headache 2010
C The efficacy of 2 different phakic intraocular lens implant in keratoconus as an isolated procedure or combined with collagen crosslinking and intra-stromal corneal ring segments: a systematic review and meta-analysis
Meta Analysis International ophthalmology 2023
C Epithelium-off photochemical corneal collagen cross-linkage using riboflavin and ultraviolet a for keratoconus and keratectasia: a systematic review and meta-analysis
Meta Analysis The ocular surface 2014
C Improvement of migraine symptoms with a proprietary supplement containing riboflavin, magnesium and Q10: a randomized, placebo-controlled, double-blind, multicenter trial
Rct The journal of headache and pain 2015
View all evidence for Riboflavin →

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