Wwb6.0

White Willow Bark

compound

White Willow Bark (Salix alba)

Natural source of salicin (aspirin precursor) with evidence for pain relief and inflammation — gentler on the stomach than aspirin.

bodypain reliefanti-inflammatorynatural aspirinheadache

26+ studies

Evidence

Reviewed 19 days ago

moderate

Safety

120-240mg salicin daily (from standardized extract)

Dose

2-4 weeks

Time to Effect

Standardized extract (15% salicin)

Best Form

White Willow Bark contains salicin, which the body converts to salicylic acid — the compound that inspired aspirin. Used for thousands of years for pain and fever, modern research supports its use for low back pain, osteoarthritis, and headaches. Generally gentler on the stomach than aspirin due to slower conversion and presence of other protective compounds.

Mechanisms of Action

🔥

COX Inhibition

Reduces prostaglandin production

🛡️

Antioxidant Effects

Contains flavonoids with antioxidant properties

Biological PathwayBeta

How White Willow Bark works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.

Recommended Dose

120-240mg salicin daily (from standardized extract)

60mg salicin240mg salicin

Optimal Timing

With meals
Divided doses

Take with food

Available Forms

Form	Type
💊Standardized extract (15% salicin)	Recommended
💊Dried bark	Alternative
💧Tincture	Alternative

Standardized extracts ensure consistent salicin content. 800mg of 15% extract = 120mg salicin.

Duration

Minimum: 2 weeks

Optimal: 4 weeks

Cycling: Not required

Note: Taking with food reduces GI irritation. Split into 2-3 doses.

✨

Pain Relief

Reduced chronic pain

⏱️ 1-2 weeks

60% of users notice thispositive

🦴

Back Pain Relief

Improved low back pain

⏱️ 1-4 weeks

55% of users notice thispositive

ModerateMax safe dose: 240mg salicin/day

🔴

Children

Avoid — salicylates linked to Reye's syndrome in viral illness

🔴

Pregnant

Avoid — same concerns as aspirin

Who Should NOT Take This

Aspirin allergy
Children with viral illness (Reye's syndrome risk)
Bleeding disorders

Drug Interactions

Blood thinners (warfarin, aspirin)moderate

Additive antiplatelet effects

NSAIDsmoderate

Increased GI and bleeding risk

Methotrexatemoderate

May increase methotrexate levels

Possible Side Effects

GI upset

milduncommon

Tip: Take with food

Allergic reaction

moderateuncommon

Tip: Avoid if aspirin-allergic

Warnings

Avoid if allergic to aspirin
Do NOT give to children with viral illness
Stop 1-2 weeks before surgery

⟡ Boswellia

complementary

Different anti-inflammatory pathways

Enhanced pain and inflammation relief

Top studies from 26+ peer-reviewed papers

📚systematic-review

DOI

Shara M et al. • Phytotherapy research : PTR (2015)

“The primary cause for concern may relate to allergic reactions in salicylate-sensitive individuals.”

Key Findings:

In recent years, various in vitro and animal studies have demonstrated that the anti-inflammatory activity of willow bark extract is associated with down regulation of the inflammatory mediators tumor necrosis factor-α and nuclear factor-kappa B.
Although willow bark extracts are generally standardized to salicin, other ingredients in the extracts including other salicylates as well as polyphenols, and flavonoids may also play prominent roles in the therapeutic actions.
Adverse effects appear to be minimal as compared to non-steroidal anti-inflammatory drugs including aspirin.
The primary cause for concern may relate to allergic reactions in salicylate-sensitive individuals.

📚systematic-review

DOI

Vlachojannis JE et al. • Phytotherapy research : PTR (2009)

“Further studies are required to find out if treatment of osteoarthritis and rheumatoid arthritis requires extract with higher doses than 240 mg salicin per day.”

Key Findings:

All studies investigated ethanolic extracts with daily doses up to 240 mg salicin over periods of up to six weeks.
Minor adverse events occurred during treatment.
The review provides moderate evidence of effectiveness for the use of ethanolic willow bark extract in low back pain.
Further studies are required to find out if treatment of osteoarthritis and rheumatoid arthritis requires extract with higher doses than 240 mg salicin per day.

📚systematic-reviewn=500

DOI

Gagnier JJ et al. • Cochrane Database of Systematic Reviews (2006)

“Moderate evidence supports willow bark for low back pain.”

Key Findings:

Moderate evidence of efficacy
120-240mg salicin effective
Need for more research

📚systematic-review

DOI

Mahdi JG et al. • Cell proliferation (2006)

“The historical steps that led to the discovery of aspirin, and its antiproliferative and anticancer potential are highlighted in this review.”

Key Findings:

For several millennia, the willow tree and salicin have been associated with salicylic acid, the key precursor molecule that has contributed to the discovery of acetylsalicylic acid, traded as aspirin.
These molecules have been shown to possess phyto- and chemotherapeutic activities as analgesic drugs.
In recent decades, aspirin has become the focus of extensive investigation into antiproliferative and anticancer activities.
The historical steps that led to the discovery of aspirin, and its antiproliferative and anticancer potential are highlighted in this review.

📋in-vitron=19

DOI

Le NPK et al. • International journal of molecular sciences (2021)

“Taken together, our in vitro data suggest that Salix extracts might present an additional anti-inflammatory treatment option in the context of SARS-CoV-2 peptides challenge; however, more confirmatory data are needed.”

Key Findings:

The inhibition of COX-2 enzyme activity, but not protein expression was observed for ASA and one Salix extract.
In activated PBMCs, the suppression of relevant cytokines (i.e., IL-6, IL-1β, and IL-10) was seen for both Salix extracts.
The anti-inflammatory capacity of Salix extracts was still retained after transepithelial passage and liver cell metabolism in an advanced co-culture model system consisting of intestinal Caco-2/HT29-MTX cells and differentiated hepatocyte-like HepaRG cells.
Taken together, our in vitro data suggest that Salix extracts might present an additional anti-inflammatory treatment option in the context of SARS-CoV-2 peptides challenge; however, more confirmatory data are needed.

View all 26+ studies

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Wwb6.0

White Willow Bark

compound

White Willow Bark (Salix alba)

Natural source of salicin (aspirin precursor) with evidence for pain relief and inflammation — gentler on the stomach than aspirin.

bodypain reliefanti-inflammatorynatural aspirinheadache

26+ studies

Evidence

Reviewed 19 days ago

moderate

Safety

120-240mg salicin daily (from standardized extract)

Dose

2-4 weeks

Time to Effect

Standardized extract (15% salicin)

Best Form

Mechanisms of Action

🔥

COX Inhibition

Reduces prostaglandin production

🛡️

Antioxidant Effects

Contains flavonoids with antioxidant properties

Biological PathwayBeta

How White Willow Bark works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.

Supplement

Molecular Target

Biological Process

Health Outcome

Strong

Moderate

Emerging

strong

moderate

emerging

Tap node to isolate • Pinch to zoom • Tap edge for research

Recommended Dose

120-240mg salicin daily (from standardized extract)

60mg salicin240mg salicin

Optimal Timing

With meals
Divided doses

Take with food

Available Forms

Form	Type
💊Standardized extract (15% salicin)	Recommended
💊Dried bark	Alternative
💧Tincture	Alternative

Standardized extracts ensure consistent salicin content. 800mg of 15% extract = 120mg salicin.

Duration

Minimum: 2 weeks

Optimal: 4 weeks

Cycling: Not required

Note: Taking with food reduces GI irritation. Split into 2-3 doses.

✨

Pain Relief

Reduced chronic pain

⏱️ 1-2 weeks

60% of users notice thispositive

🦴

Back Pain Relief

Improved low back pain

⏱️ 1-4 weeks

55% of users notice thispositive

ModerateMax safe dose: 240mg salicin/day

🔴

Children

Avoid — salicylates linked to Reye's syndrome in viral illness

🔴

Pregnant

Avoid — same concerns as aspirin

Who Should NOT Take This

Aspirin allergy
Children with viral illness (Reye's syndrome risk)
Bleeding disorders

Drug Interactions

Blood thinners (warfarin, aspirin)moderate

Additive antiplatelet effects

NSAIDsmoderate

Increased GI and bleeding risk

Methotrexatemoderate

May increase methotrexate levels

Possible Side Effects

GI upset

milduncommon

Tip: Take with food

Allergic reaction

moderateuncommon

Tip: Avoid if aspirin-allergic

Warnings

Avoid if allergic to aspirin
Do NOT give to children with viral illness
Stop 1-2 weeks before surgery

⟡ Boswellia

complementary

Different anti-inflammatory pathways

Enhanced pain and inflammation relief

Top studies from 26+ peer-reviewed papers

📚systematic-review

DOI

Shara M et al. • Phytotherapy research : PTR (2015)

“The primary cause for concern may relate to allergic reactions in salicylate-sensitive individuals.”

Key Findings:

In recent years, various in vitro and animal studies have demonstrated that the anti-inflammatory activity of willow bark extract is associated with down regulation of the inflammatory mediators tumor necrosis factor-α and nuclear factor-kappa B.
Although willow bark extracts are generally standardized to salicin, other ingredients in the extracts including other salicylates as well as polyphenols, and flavonoids may also play prominent roles in the therapeutic actions.
Adverse effects appear to be minimal as compared to non-steroidal anti-inflammatory drugs including aspirin.
The primary cause for concern may relate to allergic reactions in salicylate-sensitive individuals.

📚systematic-review

DOI

Vlachojannis JE et al. • Phytotherapy research : PTR (2009)

“Further studies are required to find out if treatment of osteoarthritis and rheumatoid arthritis requires extract with higher doses than 240 mg salicin per day.”

Key Findings:

All studies investigated ethanolic extracts with daily doses up to 240 mg salicin over periods of up to six weeks.
Minor adverse events occurred during treatment.
The review provides moderate evidence of effectiveness for the use of ethanolic willow bark extract in low back pain.
Further studies are required to find out if treatment of osteoarthritis and rheumatoid arthritis requires extract with higher doses than 240 mg salicin per day.

📚systematic-reviewn=500

DOI

Gagnier JJ et al. • Cochrane Database of Systematic Reviews (2006)

“Moderate evidence supports willow bark for low back pain.”

Key Findings:

Moderate evidence of efficacy
120-240mg salicin effective
Need for more research

📚systematic-review

DOI

Mahdi JG et al. • Cell proliferation (2006)

“The historical steps that led to the discovery of aspirin, and its antiproliferative and anticancer potential are highlighted in this review.”

Key Findings:

For several millennia, the willow tree and salicin have been associated with salicylic acid, the key precursor molecule that has contributed to the discovery of acetylsalicylic acid, traded as aspirin.
These molecules have been shown to possess phyto- and chemotherapeutic activities as analgesic drugs.
In recent decades, aspirin has become the focus of extensive investigation into antiproliferative and anticancer activities.
The historical steps that led to the discovery of aspirin, and its antiproliferative and anticancer potential are highlighted in this review.

📋in-vitron=19

DOI

Le NPK et al. • International journal of molecular sciences (2021)

“Taken together, our in vitro data suggest that Salix extracts might present an additional anti-inflammatory treatment option in the context of SARS-CoV-2 peptides challenge; however, more confirmatory data are needed.”

Key Findings:

The inhibition of COX-2 enzyme activity, but not protein expression was observed for ASA and one Salix extract.
In activated PBMCs, the suppression of relevant cytokines (i.e., IL-6, IL-1β, and IL-10) was seen for both Salix extracts.
The anti-inflammatory capacity of Salix extracts was still retained after transepithelial passage and liver cell metabolism in an advanced co-culture model system consisting of intestinal Caco-2/HT29-MTX cells and differentiated hepatocyte-like HepaRG cells.
Taken together, our in vitro data suggest that Salix extracts might present an additional anti-inflammatory treatment option in the context of SARS-CoV-2 peptides challenge; however, more confirmatory data are needed.

View all 26+ studies

What would you like to do next?

Compare with Others Find Based on Your Goals

Related Supplements

Col9.0

Collagen

9/10

Hydrolyzed peptides that rebuild skin elasticity, reduce joint pain, and strengthen bone density — results build over 8-12 weeks.

Msm8.5

MSM

8.5/10

Organic sulfur donor for connective tissue repair — reduces joint inflammation and supports post-exercise recovery and flexibility.

Chn9.0

Chondroitin

9/10

Helps cartilage retain water and resist compression — may slow cartilage loss and reduce osteoarthritis pain, especially with glucosamine.

Glu9.0

Glucosamine

9/10

Provides building blocks for cartilage maintenance — sulfate form shows consistent benefits for joint pain with long-term use.