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Control

product on market Capsule Greens First Lean Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This formula combines stimulants like caffeine and synephrine with L-theanine to support alertness and metabolic rate. White kidney bean extract is included for potential carbohydrate blocking, though evidence for its efficacy is limited. Overall, the ingredient profile relies on a mix of moderate-strength stimulants and limited-evidence botanical extracts.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Control
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
60
Servings
Other Combinations
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Market median: 180.0mg (239 products) 49 studies (A:1, B:19)
White Kidney bean extract
200 mg
Beta-Phenylethylamine HCl
150 mg
50 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)
Market median: 983.0mg (16 products) 7 studies (A:0, B:1)
Hordenine HCl
10 mg

Other Ingredients

Vegetable Capsule Rice Fiber
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Recommended use: Take 1 veggie capsule up to 2 times daily, or as directed by your healthcare provider. Allow 3 to 4 hours between servings. Do not exceed 2 capsules daily. Do not use this product 2 hours before going to sleep.

Warnings & Precautions

Cautions: This product is only intended to be used by healthy individuals 18 years of age or older. It contains caffeine as well as other natural stimulants.

Consult your physician prior to use if you are pregnant or nursing.

Do not exceed recommended use. Improper use will not improve results and it is not advised. The recommended dose of this product contains as much caffeine as about 2 cups of coffee.

Limit the use of caffeine-containing medications, food or beverages while taking this product as too much caffeine may cause nervousness, irritability, sleepless-ness, and occasional rapid heart rates.

In case of accidental overdose, seek professional assistance or contact a Poison Control Center immediately. Keep out of reach of children.

Do not use if safety seal is open or broken.

Do not exceed 2 capsules daily. Do not use this product 2 hours before going to sleep.

Formulation Notes

It contains caffeine as well as other natural stimulants.

Suitable for Vegans or Vegetarians.

Additional Information

Storage: Store in a cool dry place.

Made in USA

All Natural Appetite Support Supports Weight Loss

Metadata

Product Details

UPC / SKU8 53367 00811 6
DSLD Entry Date2019-11-21
Product TypeOther Combinations
FormCapsule
BrandGreens First Lean
DSLD ID209008
Data Updated2026-04-11
Research

Research Evidence

82
Research Sources
51
Avg Quality
28
Rct
19
Meta Analysis
17
Clinical Trial
16
Systematic Review
A Preconception lifestyle advice for people with infertility
Meta Analysis The Cochrane database of systematic reviews 2021 PubMed DOI
B The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2019 PubMed DOI
B Effects of caffeine chewing gum supplementation on exercise performance: A systematic review and meta-analysis
Meta Analysis European journal of sport science 2023 PubMed DOI
B Genetic susceptibility to caffeine intake and metabolism: a systematic review
Systematic Review Journal of translational medicine 2024 PubMed DOI
B Pharmacological interventions for sleepiness and sleep disturbances caused by shift work
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
B Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis
Meta Analysis Nutrients 2022 PubMed DOI
B The effects of green tea extract supplementation on body composition, obesity-related hormones and oxidative stress markers: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials
Meta Analysis The British journal of nutrition 2024 PubMed DOI
B Effect of green tea catechins with or without caffeine on anthropometric measures: a systematic review and meta-analysis
Systematic Review The American journal of clinical nutrition 2010 PubMed DOI
B Caffeine, CYP1A2 Genotype, and Endurance Performance in Athletes
Rct Medicine and science in sports and exercise 2018 PubMed DOI
B The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
Rct Nutritional neuroscience 2010 PubMed DOI
View all evidence for Caffeine →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.