How to Support the Body’s Natural Defences
Your immune system is working every minute of every day, whether you feel it or not. Every breath, handshake, grocery cart, countertop, and crowded room can expose your body to viral and bacterial threats. Most of the time, you never notice, because a healthy immune system is built with layers of defence that recognize, trap, and respond before these invaders can take hold.
That’s what real immunity is about. Not forcing the immune system into overdrive. Not chasing every new cold, flu, or virus headline. It’s about giving the body smart natural tools that help it respond quickly, calmly, and effectively.
One of the most impressive natural ingredients for respiratory immune defense is Pelargonium sidoides, the key ingredient in LeafSource® Cold Formula. This South African botanical has been used in traditional medicine for over 200 years and has been studied in numerous clinical trials for acute respiratory tract infections, including the common cold and bronchitis1,2.
Research suggests Pelargonium sidoides has natural antiviral and antibacterial properties, while also helping reduce cold symptom severity, support healthy mucus clearance, and promote faster recovery from cough and respiratory discomfort3,4. That is what separates it from basic “immune boosters.”
LeafSource® Cold Formula supports:
- Antiviral, antibacterial, immune, and mucolytic support
- Cold, bronchitis, laryngitis, and pharyngitis support
- Daily respiratory defense for ages 6 and up
- Use during seasonal symptoms or as proactive support
Then there’s vitamin D3, one of the most important nutrients for immune readiness. Vitamin D helps immune cells recognize threats and supports the production of antiviral and antimicrobial peptides, which are part of the body’s natural defence system5. One major study found that vitamin D supplementation helped protect against acute respiratory infections overall, especially when taken consistently6.
But here’s the real question: Are you already taking D3? If so, do you know where it comes from? Most vitamin D3 is sourced from lanolin, the grease from sheep’s wool. LeafSource® Real D3+K2 uses plant-based D3 from pine, offering a cleaner and more ethical source of the exact same active D3 your body uses.
Plus, it includes vitamin K2, which helps guide calcium where the body needs it most, especially into bones and away from soft tissues7.
Super immunity starts with a stronger baseline. LeafSource® Cold Formula supports targeted respiratory defense, while LeafSource® Real D3+K2 helps support the immune foundation your body depends on all year.
By Brad King, MS, MFS
References
1. Brendler T, van Wyk BE, 2008. Traditional and historical use of Pelargonium sidoides.
2. Timmer A, et al., 2013. Cochrane review: Pelargonium sidoides for acute respiratory tract infections.
3. Michaelis M, et al., 2011. Cited for EPs 7630 antiviral activity. [Full citation details, including journal and DOI, to be confirmed with vendor.]
4. Riley P, et al., 2019. Clinical trial on EPs 7630 in patients with the common cold.
5. Gombart AF, 2009. Vitamin D and the antimicrobial peptide pathway.
6. Martineau AR, et al., 2017. BMJ systematic review/meta-analysis on vitamin D supplementation and acute respiratory tract infections.
7. Theuwissen E, et al., 2012. [Vendor’s submission notes flagged this citation for possible replacement with Sato et al., 2020, “MK-7 and Its Effects on Bone Quality and Strength,” to be confirmed before publishing.]
About the Author: LeafSource
LeafSource is a Canadian natural health brand offering plant-based wellness supplements crafted to support whole-body vitality. Guided by purity, sustainability, and science-backed ingredients, LeafSource creates clean, nutrient-rich formulas rooted in the power of nature.