The Potential Hazards of E-Cigarette and Dual Use: a Cochrane Systematic Review and Secondary Analysis

Dec.01.2022
The Potential Hazards of E-Cigarette and Dual Use: a Cochrane Systematic Review and Secondary Analysis
A study on Cochrane's systematic review found that switching from smoking to e-cigarettes significantly reduces potential harm biomarkers. However, a separate study found that using both traditional and e-cigarettes has the same harmful effect on the heart as smoking alone.

Title: Biomarkers of potential harm from switching from tobacco smoking to e-cigarette use, dual use or cessation: a Cochrane systematic review and meta-analysis of secondary analysis of data from randomized controlled trials of electronic cigarettes for smoking cessation. In this study, researchers conducted a secondary analysis of data from randomized controlled trials of electronic cigarettes for smoking cessation in Greece, Italy, Poland, the United Kingdom, and the United States. The conclusion drawn was that switching from tobacco smoking to e-cigarette use significantly lowered potential harmful biomarkers.


At the same time, according to a recent study published in the American Heart Association journal "Circulation," using both traditional cigarettes and e-cigarettes poses the same risk to the heart as smoking alone.


A study titled "Association Between Patterns of Cigarette and E-Cigarette Use and Inflammatory and Oxidative Stress Biomarker Levels in U.S. Adults: A Population Assessment of Tobacco and Health Study" analyzed more than 7,100 U.S. adults aged 18 and over to explore the connection between smoking, vaping, and heart health.


Researchers used data from the Population Assessment of Tobacco and Health (PATH) study to search for biomarkers of inflammation and oxidative stress, as these biomarkers are known to indicate predictive factors for heart disease and cardiovascular events, such as heart attacks and heart failure.


After analyzing five biomarkers of inflammation and oxidative stress, participants were divided into four groups: exclusive smokers, exclusive e-cigarette users, dual users, and non-users of e-cigarettes. Researchers listed the following findings:


Participants who only use electronic cigarettes showed similar levels of inflammation and oxidative stress as those who do not use electronic cigarettes or smoke at all. However, compared to participants who do not use cigarettes or electronic cigarettes, those who smoke exclusively or use both cigarettes and electronic cigarettes had higher levels of all evaluated biomarkers. Participants who only use electronic cigarettes had significantly lower levels of nearly all inflammation and oxidative stress biomarkers compared to those who only smoke. However, participants who use both cigarettes and electronic cigarettes had biomarker levels similar to those who exclusively smoke. 2FIRSTS will continue to report on this issue, with updates available on the "2FIRSTSAPP". Scan the QR code below to download the app.



Disclaimer

This article is provided solely for professional research, industry discussion, and informational purposes. Any references to brands, companies, products, technologies, or policies are made for factual reporting and analytical purposes only, and do not constitute endorsement, recommendation, promotion, or advertising by 2Firsts.

Nicotine-containing products, including but not limited to cigarettes, e-cigarettes, heated tobacco products, and nicotine pouches, carry significant health risks. Readers are responsible for complying with all applicable laws and regulations in their respective jurisdictions, including age restrictions and access limitations.

The information contained in this article should not be regarded as investment, legal, medical, regulatory, or commercial advice. While 2Firsts strives to ensure the accuracy and reliability of its content, it does not assume liability for any direct or indirect loss arising from errors, omissions, inaccuracies, or reliance on the information contained herein.

This article is not intended for individuals below the legal age for accessing tobacco or nicotine-related information in their jurisdiction.

 

Copyright Notice

This article is either original content produced by 2Firsts or content reproduced, translated, summarized, or adapted from third-party sources with attribution where applicable. The intellectual property rights of the original content remain with 2Firsts or the respective original rights holders.

No individual or organization may copy, reproduce, distribute, republish, modify, translate, or otherwise use this content without prior authorization. Any unauthorized use may result in legal action.

For copyright-related inquiries, corrections, or removal requests, please contact: info@2firsts.com.

 

AI-Assisted Translation and Editing Notice

Portions of this article may have been translated, edited, or reviewed with the assistance of artificial intelligence tools to improve efficiency and readability. Due to the limitations of AI-assisted translation and editing, discrepancies, omissions, or inaccuracies may exist when compared with the original source.

Where applicable, readers are advised to refer to the original source for the most complete and accurate information. If you identify any errors or believe that any content infringes upon your rights, please contact us at info@2firsts.com, and we will review and address the matter promptly.

Product | Juul Labs Launches Upgraded JUUL2 Kit in UK With Four Pods at £9.99 and USB-C Charging
Product | Juul Labs Launches Upgraded JUUL2 Kit in UK With Four Pods at £9.99 and USB-C Charging
Juul Labs UK has introduced an upgraded JUUL2 Starter Kit for the UK market in October 2026, retaining a recommended retail price of £9.99 while doubling the number of included pods from two to four. The kit contains Crisp Menthol, Virginia Tobacco, Mango and Watermelon pods. The updated device replaces the previous proprietary charging dock with a USB-C port and offers longer battery life. The kit also features reduced packaging and retains a two-year limited warranty. Distribution is scheduled through major UK retailers, wholesalers, convenience stores and the JUUL UK website.
product
Oct.15
NAS 2026 | Cliff Douglas: Risk Continuum Should Play a Central Role in Tobacco Policy
NAS 2026 | Cliff Douglas: Risk Continuum Should Play a Central Role in Tobacco Policy
Cliff Douglas, a veteran U.S. tobacco-control and public health policy figure, told NAS 2026 that the “continuum of risk” should play a central role in tobacco policy. He called for clearer market pathways, stronger risk communication, differentiated regulation and enforcement, and said possible FDA reforms to PMTA reviews could be a “welcome correction” if they create a more efficient, predictable route for scientifically substantiated lower-risk products. Read 2Firsts’ on-site coverage.
Sep.26
Product | DOJO Launches 0+6ml BLAST7K Fresh in UK in September, Retaining 2+8ml Pod Compatibility Ahead of October Per-Milliliter Vaping Duty
Product | DOJO Launches 0+6ml BLAST7K Fresh in UK in September, Retaining 2+8ml Pod Compatibility Ahead of October Per-Milliliter Vaping Duty
DOJO officially launched the BLAST7K Fresh on September 17, 2026, introducing a UK-market prefilled pod product with 6ml of e-liquid and a manufacturer-rated capacity of up to 7,000 puffs. The device features a 1000mAh rechargeable battery, the INSTA-JUICED structure and COREX BLAST dual-mesh technology, while retaining compatibility with existing BLAST pods. The launch comes less than two weeks before the UK's Vaping Products Duty takes effect on October 1. At the new duty rate, 6ml of vaping liquid would correspond to £1.32 in VPD. DOJO has not stated that the product's 6ml format was designed in response to the new duty.
Sep.20
Product | PIXL Adds 6ml PIXL 5K in UK Alongside 12ml PIXL 8000 as Vape Duty Takes Effect
Product | PIXL Adds 6ml PIXL 5K in UK Alongside 12ml PIXL 8000 as Vape Duty Takes Effect
Vaping brand PIXL has introduced the PIXL 5K reusable prefilled pod device in the UK, featuring a 2ml prefilled pod and a 4ml refill container with a combined e-liquid capacity of 6ml. The device uses 20mg/ml nicotine salt e-liquid and is advertised to deliver up to approximately 5,000 puffs. Available through UK retailers by August 2026, the PIXL 5K sits alongside the existing 12ml PIXL 8000. The UK's Vaping Products Duty took effect on October 1 at £0.22 per millilitre, producing theoretical duty amounts of £1.32 and £2.64 for the two products' respective full refill sets.
product
Oct.10
BAT Adds Former Apple General Counsel Bruce Sewell to Board as Finance, Legal, Marketing and Regional Leadership Shift
BAT Adds Former Apple General Counsel Bruce Sewell to Board as Finance, Legal, Marketing and Regional Leadership Shift
British American Tobacco has appointed former Apple Senior Vice President, General Counsel and Secretary Bruce Sewell as an independent non-executive director, effective January 1, 2027. He will also join BAT's Audit and Nominations Committees. BAT Chair Luc Jobin highlighted Sewell's experience in technology, government and regulatory affairs, public-company governance and AI-company boards. Over the past 18 months, BAT has changed or announced changes to its CFO, general counsel, CMO and APMEA regional leadership, while the main board has also seen multiple changes. The appointment comes as BAT advances Horizon 2030 and its Fit2Win transformation while expanding New Categories and reshaping parts of its digital, technology and operating structure.
Business
Oct.29
From Product Innovation to Integrated Solutions: NEXTECH Expands Its Global Heated Tobacco Solutions
From Product Innovation to Integrated Solutions: NEXTECH Expands Its Global Heated Tobacco Solutions
NEXTECH launched its NEXE Pro circumferential-heating tobacco stick globally at InterTabac 2026, as the company expands from product innovation into broader heated tobacco solutions. Amid intensifying competition across global HTP markets, NEXTECH is strengthening its R&D, manufacturing and pre-launch support capabilities to serve different types of business customers.
Industry Insight
Sep.15