Oaktree HEART

Six Herbs  ·  One Formula  ·  Precisely Synergistic

Nature's Defense,
Refined.

Taken at the first sign of seasonal symptoms

A pharmacognosy-informed, six-herb synergistic formula. Each botanical standardized to its primary bioactive compound. All six working in concert across complementary biological pathways.

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Synergy by design,
not by accident.

Oaktree HEART's flagship formula is not a list of immune herbs. It is a purposefully architected system — each of the six botanicals selected for its dominant primary bioactive compound and the distinct biological pathway through which it operates.

Designed for acute, early-intervention use: taken at the first sign of cold or flu-like symptoms, not as a daily supplement. This is precision over volume.

6
Botanical Herbs
6
Primary Bioactives
4
Biological Dimensions
17
Years Founder-Proven

"Not six herbs doing the same thing — six herbs doing six different things in concert."

Six Herbs. One Purpose.

Each botanical sourced from its native growing region and standardized to a verified primary bioactive compound concentration before blending. Hover to explore.

01
Nigella sativa
Black Cumin Seed Oil
Thymoquinone
Modulates NF-kB inflammatory signaling; well-documented immunomodulatory effects supporting the body's natural resilience
◈ Egypt · Ethiopia · Turkey
02
Origanum vulgare
Oil of Oregano
Carvacrol & Thymol
Phenolic terpenes that disrupt microbial cell membrane integrity; documented antifungal activity against Candida
◈ Turkey · Greece
03
Hydrastis canadensis
Goldenseal
Berberine
Isoquinoline alkaloid; stimulates mucosal immunity in the gut and respiratory tract — the body's first physical line of defense
◈ Appalachian USA (cultivated)
04
Olea europaea
Olive Leaf Extract
Oleuropein & Elenolic Acid
Secoiridoid compounds; research indicates inhibition of viral replication and cell entry pathways; significant antioxidant activity
◈ Spain · Tunisia · Greece
05
Allium sativum
Garlic
Allicin
Disrupts microbial membrane integrity and enzyme function through multiple complementary mechanisms; among the most broadly researched botanicals
◈ Kyrgyzstan · Uzbekistan
06
Camellia sinensis
Green Tea Extract
EGCG
Polyphenol catechin; enhances innate immune response; significant antioxidant support for immune cells under oxidative stress
◈ Zhejiang · Yunnan · Uji, Japan

Four Dimensions
of Support

Antimicrobial botanicals are plant-derived extracts, essential oils, and herbs containing phytochemicals — such as phenols, terpenes, and alkaloids — that disrupt pathogen cell walls or inhibit microbial replication. They are widely studied as complementary alternatives to synthetic antibiotics against bacteria, fungi, and viruses.[1, 2, 3, 4, 5]

The formula supports the body across four distinct but reinforcing biological dimensions.

01
Mucosal Barrier Defense
Berberine concentrates its activity at the mucosal surfaces of the gut and respiratory tract — the body's first physical line of defense against seasonal pathogens.
02
Immune Signaling Modulation
Thymoquinone modulates NF-kB inflammatory signaling, calibrating the immune response rather than simply stimulating it.
03
Membrane-Level Balance
Carvacrol, thymol, and allicin each target microbial cell membranes through distinct pathways — creating reinforcing pressure without redundancy.
04
Antioxidant Immune Protection
Oleuropein and EGCG protect immune cells from oxidative stress during an active immune challenge through complementary mechanisms.

† Mechanisms reflect peer-reviewed research findings on individual bioactive compounds and do not constitute product claims. All consumer-facing claims comply with DSHEA structure/function requirements.

[1] SeyedAlinaghi S, Mehraeen E, Mirzapour P, et al. (2025). A systematic review on natural products with antimicrobial potential against WHO's priority pathogens. European Journal of Medical Research, 30:525. doi: 10.1186/s40001-025-02717-x.

[2] AlSheikh HMA, Sultan I, Kumar V, Rather IA, Al-Sheikh H, Tasleem Jan A, Haq QMR. (2020). Plant-based phytochemicals as possible alternative to antibiotics in combating bacterial drug resistance. Antibiotics, 9(8):480. doi: 10.3390/antibiotics9080480.

[3] Abdallah EM, Alhatlani BY, de Paula Menezes R, Martins CHG. (2023). Back to nature: medicinal plants as promising sources for antibacterial drugs in the post-antibiotic era. Plants (Basel), 12(17):3077. doi: 10.3390/plants12173077.

[4] Guedes BN, Krambeck K, Durazzo A, Lucarini M, Santini A, Oliveira MBPP, Fathi F, Souto EB. (2024). Natural antibiotics against antimicrobial resistance: sources and bioinspired delivery systems. Brazilian Journal of Microbiology, 55(3):2753–2766. doi: 10.1007/s42770-024-01410-1.

[5] Rachwał K, Gustaw K. (2025). Plant-derived phytobiotics as emerging alternatives to antibiotics against foodborne pathogens. Applied Sciences, 15(12):6774. doi: 10.3390/app15126774.

Origin Authentic.
Uncompromisingly Sourced.

Every botanical is sourced from the geographic region where it grows natively — where centuries of cultivation have optimized phytochemical expression.

Origin-authentic sourcing
GACP-compliant suppliers
Heavy metal & pesticide screened
Batch COA published
Goldenseal from certified cultivation
Fair trade prioritized
Nigella sativa
Egypt · Ethiopia · Turkey
Origanum vulgare
Turkey · Greece
Hydrastis canadensis
Appalachian USA
Olea europaea
Spain · Tunisia · Greece
Allium sativum
Kyrgyzstan · Uzbekistan
Camellia sinensis
Zhejiang · Yunnan · Uji
Tal Hadar
Founder, Oaktree HEART
Plant secondary metabolite science · Pharmacognosy · Formulation · Regulatory compliance
"I believe the plant kingdom holds solutions that modern wellness has overlooked. Every decision we make — from sourcing to formulation to transparency — reflects that conviction."

My path to plant-based medicine began through my own health. For years I was getting sick with seasonal illness three to four times annually — until I began using a botanical formula built around these six herbs. That was nearly 17 years ago.

The experience changed not just how I approached my own wellness, but how I understood what plant-based medicine was genuinely capable of when formulated with scientific intention rather than marketing convenience.

What I found in studying the industry was an ecosystem that had drifted far from its roots: synthetic ingredients standing in for botanical ones, proprietary blends used to conceal underdosing, poor sourcing, and the absence of any real scientific rationale. Oaktree HEART is my answer to that gap.

The Formula

Premium liquid botanical extract. Third-party tested. COA published for every batch.

Standard
60ml Tincture
3-day acute supply. Taken at the first sign of cold or flu-like symptoms.
$34
per bottle · MSRP
Subscribe & Save
Monthly Restocking
One 60ml bottle monthly. Always have it on hand when you need it most.
$30
per month · save 12%

Wholesale available for practitioners and health food retailers · $17/unit (50% of MSRP) · Inquire here

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What We Stand For

Precision over volume
Intentional formulation over mass production — every ingredient earns its place.
Purity without compromise
Premium sourcing, third-party verified. No fillers, no shortcuts.
Prevention as philosophy
Support the body proactively, before symptoms take hold — not after.
Ecological respect
Sustainable wildcrafting and ethical supply chains worldwide.
Transparency
Full disclosure of sourcing, extraction methods, and testing — always.
Customer education
Every claim backed by peer-reviewed research, made accessible.