When it comes to lung health supplements, many companies make bold claims without the research to back them up. At Betterbrand, we believe in science-backed transparency—which is why we partnered with Citruslabs to conduct a rigorous 60-day clinical study on our Mullein and Chlorophyll Tincture. The results speak for themselves: participants reported significant improvements in coughing frequency, airway clarity, mucus clearance, and even sleep quality.
In this comprehensive breakdown, we'll take you inside the study—how it was conducted, what the participants experienced, and what the findings mean for anyone looking to support their respiratory wellness naturally.
Table of Contents
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Why Clinical Studies Matter for Supplements
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About the Citruslabs Partnership
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Study Design and Methodology
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The Key Findings: What Participants Reported
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Understanding the Star Ingredients
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What These Results Mean for You
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Frequently Asked Questions
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Conclusion
Why Clinical Studies Matter for Supplements
The supplement industry faces a credibility gap. According to a 2024 ConsumerLab survey, only 21% of supplement users feel "very confident" that the products they take actually work. The reason? Many companies rely solely on ingredient-level research without ever testing their finished formulas.
That's where clinical studies on actual products make a difference. While we know from decades of research that mullein benefits respiratory health and that chlorophyll provides antioxidant support, testing the specific formulation—at the specific dosage—gives consumers real data about what they can expect.
Dr. Chris Jackson, PharmD, who formulated the BetterLungs Mullein + Chlorophyll Tincture, put it simply: "Third-party clinical validation isn't just good science—it's respect for the people trusting us with their health."
About the Citruslabs Partnership
Citruslabs is an independent clinical research organization specializing in consumer health product studies. They operate under strict protocols designed to minimize bias and maximize reliability. For supplement brands, partnering with a third-party lab like Citruslabs provides credibility that in-house testing simply cannot match.
Key aspects of the partnership included:
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Independent oversight: Citruslabs designed and administered the study without Betterbrand interference
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Standardized protocols: All participants followed identical usage guidelines
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Validated outcome measures: Questionnaires used established metrics for respiratory wellness assessment
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No cherry-picking: All participant data was included in final analysis
This commitment to independent validation reflects Betterbrand's broader standards—products manufactured in a GMP-certified facility, third-party tested by ISO-certified labs, and formulated by a Doctor of Pharmacy.
Study Design and Methodology
The 60-day study enrolled adults seeking respiratory wellness support. Participants were instructed to take 2 full droppers (2ml) of the Mullein + Chlorophyll Tincture daily, either mixed in water or placed under the tongue for faster absorption.
Participant Profile:
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Adults experiencing occasional respiratory discomfort
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Mix of former smokers and non-smokers
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Varying baseline respiratory wellness levels
What Was Measured:
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Coughing frequency
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Perceived airway clarity
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Ease of mucus clearance
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Sleep quality (related to respiratory comfort)
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Overall satisfaction with respiratory wellness
Participants completed validated questionnaires at baseline, 30 days, and 60 days to track changes over time.
The Key Findings: What Participants Reported
After 60 days of consistent use, the results showed meaningful improvements across multiple measures of respiratory wellness:
Coughing Frequency
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81% of participants reported less frequent coughing
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Many noted the most significant improvements after the 30-day mark
Airway Clarity
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77% reported clearer airways
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Participants described feeling like they could breathe more easily and deeply
Mucus Clearance
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73% reported easier mucus clearance
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This aligns with mullein's traditional use as a respiratory support herb
Sleep Quality
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68% reported improved sleep quality
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Respiratory comfort at night contributed to less interrupted sleep
These findings validate what herbalists and natural health practitioners have observed for centuries—mullein supports respiratory wellness. But the clinical study takes it further by quantifying these benefits in a controlled setting with the specific Betterbrand formulation.
Understanding the Star Ingredients
The BetterLungs Mullein + Chlorophyll Tincture combines two powerful natural ingredients in an alcohol-free glycerite base designed for maximum absorption.
Mullein Leaf 10:1 Extract (280mg per serving)
This concentrated extract is equivalent to 2800mg of whole mullein leaf. Mullein (Verbascum thapsus) has been used for centuries in traditional European and Native American herbal practices to support respiratory wellness. Modern research, including a 2022 review published in the Journal of Ethnopharmacology, confirms that mullein contains saponins and mucilage that may help soothe the respiratory tract and support natural mucus clearance.
The 10:1 extraction ratio means you're getting a potent, concentrated dose in each dropper—far more than what typical mullein chlorophyll drops or mullein tincture products offer.
Chlorophyll (100mg per serving)
Chlorophyll, the green pigment in plants, provides powerful antioxidant support. Research published in the International Journal of Molecular Sciences suggests chlorophyll may help protect cells from oxidative stress—a key concern for anyone focused on lung health supplements and clear airways naturally.
Why Liquid Form Matters
Unlike capsules that must be broken down in the digestive system, liquid tinctures begin absorbing in the mouth. This faster absorption means you may notice effects more quickly, which may explain why study participants saw measurable improvements within the 60-day window.
What These Results Mean for You
Clinical study results represent averages across a population—your individual experience may vary. However, the data suggests that consistent daily use of the Mullein + Chlorophyll Tincture can provide meaningful respiratory wellness support for most users.
Who May Benefit Most:
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Former smokers supporting lung repair after smoking
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Those experiencing occasional mucus buildup
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Anyone wanting to support their respiratory system during seasonal changes
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People seeking a natural alternative to clear airways naturally
Setting Realistic Expectations:
The study showed progressive improvement over 60 days, with many participants noticing the most significant changes after the first month. This suggests the tincture works best as part of a consistent daily wellness routine rather than an as-needed remedy.
Complementary Approaches:
For comprehensive respiratory support, many of our 836,000+ customers combine the tincture with other BetterLungs products. The BetterLungs Capsules offer additional support through ingredients like NAC supplement (N-Acetyl L-Cysteine), Vitamin D, and Maritime Pine Bark Extract. Research published in the European Respiratory Journal has shown that NAC supports the body's natural antioxidant pathways and may help maintain healthy mucus viscosity.
Frequently Asked Questions
How was the clinical study different from typical supplement research?
Most supplement brands cite research on individual ingredients but never test their actual products. The Betterbrand study tested our specific Mullein + Chlorophyll Tincture formula at the exact dosage we recommend. This gives you data on the product you're actually buying—not just theoretical benefits from isolated ingredients. Citruslabs, an independent research organization, administered the study to ensure unbiased results.
How long did it take for participants to notice improvements?
The 60-day study design captured changes at both the 30-day and 60-day marks. While some participants reported noticeable improvements within the first few weeks, the data showed the most consistent, significant improvements after 60 days of daily use. This reinforces the importance of taking lung health supplements consistently rather than sporadically.
Is the Mullein + Chlorophyll Tincture safe for former smokers?
Yes. The study included former smokers seeking respiratory wellness support. The alcohol-free glycerite formula is gentle on the system, and the mullein benefits both current and former smokers looking to support their respiratory health. However, if you have specific health conditions or take medications, consult your healthcare provider before starting any new supplement.
How does this product compare to other mullein chlorophyll drops on the market?
Several factors set the BetterLungs tincture apart: the 10:1 mullein extract concentration (equivalent to 2800mg whole leaf), the 100mg chlorophyll dose, the alcohol-free formula, and—most importantly—the clinical validation. Few competing products can point to a 60-day third-party study demonstrating specific outcomes like 81% of users reporting reduced coughing frequency.
Can I take this alongside BetterLungs Capsules or other supplements?
Many customers combine the tincture with BetterLungs Capsules for comprehensive respiratory support. The capsules contain complementary ingredients like NAC, Vitamin D, Elderberry, and American Ginseng that work alongside mullein and chlorophyll. There are no known interactions between these products, but as always, discuss your supplement regimen with your healthcare provider.
What if the product doesn't work for me?
Betterbrand offers a 365-day money-back guarantee—one of the longest in the industry. If you don't experience the respiratory wellness benefits you're looking for, you can return the product for a full refund. We're confident in the clinical data, but we also respect that individual responses vary.
Conclusion
The 60-day Citruslabs clinical study validates what traditional herbalism has suggested for generations: mullein genuinely supports respiratory wellness. But more than that, it demonstrates that Betterbrand's specific formulation—with its concentrated 10:1 mullein extract and 100mg chlorophyll—delivers measurable results for real people.
When 81% of participants report less frequent coughing, 77% report clearer airways, 73% experience easier mucus clearance, and 68% report improved sleep quality, the evidence speaks louder than marketing claims ever could.
If you're looking for lung health supplements backed by real science, formulated by Dr. Chris Jackson, PharmD, and protected by a 365-day money-back guarantee, the BetterLungs Mullein + Chlorophyll Tincture offers something few competitors can match: clinical proof.
Ready to experience the benefits for yourself? Join the 836,000+ customers who trust Betterbrand for their respiratory wellness needs.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement.
Sources
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ConsumerLab 2024 Survey on Supplement Confidence - Annual survey on consumer trust in dietary supplements
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Journal of Ethnopharmacology - Mullein Traditional Uses Review (2022) - Comprehensive review of Verbascum thapsus ethnobotanical applications
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International Journal of Molecular Sciences - Chlorophyll Antioxidant Properties - Research on chlorophyll's cellular protective effects
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European Respiratory Journal - NAC and Respiratory Health - Studies on N-Acetyl L-Cysteine and mucolytic properties
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Citruslabs Clinical Research Standards - Information on independent supplement testing protocols