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Sustained Focus

product on market Capsule Nature's Way Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 33% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

L-Theanine and Neumentix spearmint leaf extract are included to support cognitive function and focus. Research on these ingredients generally shows moderate evidence for improving attention and mental clarity. The overall evidence coverage for this specific formulation is limited.

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

Label

Product Label

Label for Sustained Focus
Open Full PDF View on NIH DSLD →
Details

Label Data

3 Capsule(s)
Serving Size
20
Servings
Other Combinations
Product Type
33%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Total Carbohydrates
1 Gram(s) (1% DV)
Neumentix Spearmint leaf extract
900 mg
200 mg
Market median: 200.0mg (358 products) 9 studies (A:0, B:2)

Other Ingredients

plant-derived Capsule Cellulose Magnesium Stearate Silica
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Recommendation: Adults take 3 capsules once daily, preferably with food. Do not exceed recommended dose.

Warnings & Precautions

Warning: Do not take if you are pregnant or nursing. If you are taking any medications, consult a healthcare professional before use.

Keep out of reach of children.

Safety sealed with inner seal. Do not use if seal is broken or missing.

Formulation Notes

Brain health formula Peak performance often comes with peak stress. Stay on task with Sustained Focus. This caffeine-free stack includes an amino acid and a botanical to calm your stress and let you concentrate on the task at hand.

We combined clinically studied ingredients Suntheanine L-Theanine and Neumentix Spearmint to provide an approachable solution to help you relax and focus.

Improved focus & concentration Calms your mind & supports the ability to stay on task

Gluten free. No yeast-derived ingredients, wheat, corn, soy, dairy, or artificial colors, flavors, or preservatives.

Additional Information

Keep bottle tightly closed. Store at room temperature. Avoid excessive heat and direct sunlight.

Bottles made from 97% post-consumer recycled plastic

Quality Global Sourcing Bottled & Tested In the USA

Metadata

Product Details

UPC / SKU0 33674 13691 1
DSLD Entry Date2021-04-22
Product TypeOther Combinations
FormCapsule
BrandNature's Way
DSLD ID246237
Data Updated2026-04-11
Research

Research Evidence

37
Research Sources
53
Avg Quality
22
Rct
10
Systematic Review
3
Meta Analysis
1
Clinical Trial
1
Openfda Safety
B Examining the effect of L-theanine on sleep: a systematic review of dietary supplementation trials
Systematic Review Nutritional neuroscience 2026 PubMed DOI
B The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Meta Analysis Sleep medicine reviews 2025 PubMed DOI
B The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
Rct Nutritional neuroscience 2010 PubMed DOI
B Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial
Rct Nutrients 2019 PubMed DOI
B The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review
Systematic Review International journal of molecular sciences 2023 PubMed DOI
B Effects of Tea (Camellia sinensis) or its Bioactive Compounds l-Theanine or l-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Meta Analysis Nutrition reviews 2025 PubMed DOI
B Effect of Alpha-S1-Casein Tryptic Hydrolysate and L-Theanine on Poor Sleep Quality: A Double Blind, Randomized Placebo-Controlled Crossover Trial
Rct Nutrients 2022 PubMed DOI
B Effect of L-theanine on selective attention in a traffic-related reaction task in sleep-deprived young adults: a double-blind placebo-controlled, crossover study
Rct Nutritional neuroscience 2025 PubMed DOI
B The combined effects of L-theanine and caffeine on cognitive performance and mood
Rct Nutritional neuroscience 2008 PubMed DOI
B Acute effects of tea constituents L-theanine, caffeine, and epigallocatechin gallate on cognitive function and mood: a systematic review and meta-analysis
Meta Analysis Nutrition reviews 2014 PubMed DOI
View all evidence for L Theanine →
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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.