Herb Profile
Garlic Allium Sativum
Garlic (Allium sativum) is most studied for cardiovascular support, including modest effects on blood pressure and lipids, alongside antimicrobial and immune modulating activity from organosulfur compounds like allicin and ajoene.
Last reviewed: •5 human studies cited
B ModerateUse extra caution — GI upset; odor; potential bleeding risk at high intake Details
- Evidence
- Moderate Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- Moderate caution
- Best for
- Cardiovascular, Antimicrobial, Immune, Inflammatory signaling
- Avoid / review if
- Bleeding Disorders, Pre Surgery, Anticoagulants
Monograph visual
Garlic Allium Sativum
The Hippie Scientist illustration
Where to go next — guides & comparisons
Continue reading
- If you want to browse more herbs → All herbs
Safety & Cautions
GI upset; odor; potential bleeding risk at high intake
60%
Moderate caution — review before use
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - Bleeding Disorders
- - Pre Surgery
- - Anticoagulants
- - Antiplatelets
Safety classifications
- - Anticoagulant Caution: Bleeding or anticoagulant-adjacent caution language is present.
Full safety note
- - GI upset; odor; potential bleeding risk at high intake
Safety labels
- - Anticoagulant Caution
Evidence-based safety
Caution when combined
These pairings share a flagged risk mechanism. They are additive-effect cautions derived from contraindication data, not confirmed clinical interactions. Consult a clinician before combining.
High-Priority Caution
147 flagged pairingsBleeding / anticoagulant risk
High-Priority Caution
147 flagged pairingsBleeding / anticoagulant risk
Browse the grouped cautions below. The list scrolls inside this card when long.
Bleeding / anticoagulant risk
- aescin
- Aged Garlic Extract
- ajoene
- Ajwain
- Allicin
- Garlic
- American Ginseng Extract
- Andrographis
- Angelica Archangelica
- Angelica Dahurica
- Angelica Pubescens
- Angelica Root
- Angelica Sinensis
- Arjuna
- Artemisia Capillaris
- Artichoke
- Ashitaba
- Ashitaba Extract
- Astaxanthin
- Berberis
- Black Seed
- Black Seed Oil
- Blueberry
- Boldo
- Boswellia
- Capsicum
- Caraway
- Carnitine L Tartrate
- Cayenne
- Chamomile
- Chinese Skullcap
- Chuanxiong
- Cissus
- Citicoline
- Clove
- Cnidium Monnieri
- Coleus Forskohlii
- Commiphora Mukul
- Coenzyme Q10
- Cordyceps
- Cranberry (Vaccinium macrocarpon)
- crocetin
- crocin
- cryptotanshinone
- Curcuma Wenyujin
- Curcumin
- Damiana
- Danshen
- Devils Claw Extract
- Dong Quai
- EGCG
- Epimedium
- Epimedium Brevicornum
- Evening Primrose (Oenothera biennis)
- Fenugreek
- Fenugreek Extract
- ferulic acid
- Feverfew
- Fisetin
- forskolin
- Fraxinus Rhynchophylla
- Fucoxanthin
- Galangal
- Reishi
- Garcinia Mangostana
- Garlic Aged Extract
- Garlic Extract
- Ginger (Zingiber officinale)
- Ginkgo
- Ginkgo Biloba Extract
- Ginkgo Extract EGb 761
- Panax Red Ginseng
- Panax White Ginseng
- ginsenoside rg3
- Glucosamine
- Goldenseal
- Lion's Mane
- Holy Basil / Tulsi (Ocimum tenuiflorum)
- Horse Chestnut
- hydroxytyrosol
- Japanese Knotweed
- Kudzu
- L-Carnitine
- Ligusticum Chuanxiong
- Magnolia
- Mangosteen
- Maral Root
- Chamomile
- Melatonin
- MSM
- Myrtle
- Nettle Root
- Nigella Sativa
- Noni
- Notoginseng
- Ocimum Basilicum
- Olive Leaf Extract
- Oregano
- Paeonia Lactiflora
- Asian Ginseng
- Panax Ginseng Extract
- Papaya Leaf
- Pastinaca Sativa
- Pau D'arco
- Perilla
- Phosphatidylserine
- Piper Longum
- Bifidobacterium Probiotic
- Lactobacillus Probiotic
- Probiotics - Bifidobacterium spp.
- Probiotics - Lactobacillus spp.
- Psoralea Corylifolia
- Pycnogenol
- Quercetin
- Quercetin Phytosome
- Red Clover
- Reishi (Ganoderma lucidum)
- Resveratrol
- Rhodiola Extract SHR-5
- Rose Hips
- Rosemary
- Saffron
- Saffron Extract
- Salvia miltiorrhiza
- Saw Palmetto (Serenoa repens)
- Saw Palmetto Extract
- Schisandra Berry
- Schisandra Chinensis
- Scutellaria Baicalensis
- Selaginella Tamariscina
- Soybean
- Syzygium Aromaticum
- Terminalia arjuna
- Thunder God Vine
- Thyme
- Tongkat Ali
- Trans-Resveratrol
- Fenugreek
- Tripterygium Wilfordii
- Turmeric (Curcuma longa)
- Turmeric Curcumin + Piperine
- Valerian
- Vitamin D3 + K2
- Grape
- White Peony
- Willow Bark Extract
- Yarrow
Evidence Summary
Evidence lens
Useful signal, but study design, dose, and population still matter.
ModerateModerate Human Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Metabolic Regulation · Vascular Function Support · Immune Signaling Modulation
Research maturity: Preliminary or mixed — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — GI upset; odor; potential bleeding risk at high intake
This profile cites 5 human studies.
How evidence grades work
Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.
A
Strong
Multiple RCTs, consistent direction, adequate effect size
B
Moderate
Some RCTs or consistent observational data in humans
C
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
D
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (5)Cited studies informing this profile. RCTs and reviews shown first.
| Study | Type | Sample | Source |
|---|---|---|---|
Chemical Constituents and Pharmacological Activities of Garlic (Allium sativum L.): A Review El-Saber Batiha G et al. (2020) | — | — | PubMed → |
Allicin: chemistry and biological properties Borlinghaus J et al. (2014) | — | — | PubMed → |
Fugh-Berman A et al. (2000) | — | — | PubMed → |
PubMed | — | — | PubMed → |
PubMed | — | — | PubMed → |
Dosing & Timing
Dose guidance
Aged garlic extract (~1.2 mg S allyl cysteine/day) or dried powder 600 1200 mg/day; composition varies by preparation
How Garlic Allium Sativum Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Garlic Allium Sativum Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & Biological Pathways
Preclinical pathways
Proposed mechanisms from in vitro and animal research; these do not confirm clinical outcomes in humans.
Metabolic RegulationVascular Function SupportImmune Signaling ModulationLipid Metabolism SupportEndothelial Function Support
Active Compounds
Key constituents studied in Garlic Allium Sativum, with full pharmacology and safety profiles.
Condition guides
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Review available sources for Garlic Allium Sativum
Independent database mapping — evaluated separately from safety and efficacy scores.
Affiliate Disclosure: Shopping links may earn this site a commission at no cost to you. Links are chosen on quality and availability, never commission tiers; safety warnings and evidence ratings stay independent.
Affiliate-ready sourcing
Garlic product picks
Affiliate recommendations for Garlic Allium Sativum. Review safety, dose, and product quality before buying.
Affiliate disclosure: we may earn a commission from qualifying links at no extra cost to you. How we stay independent.
Product Form & Quality Guidelines
When sourcing Garlic Allium Sativum, verify the label for:
- Standardized Extract: Confirm active content percentages on the supplement facts panel (e.g. standardized to specific marker compounds) rather than simple raw herb weights.
- Third-Party Testing: Look for independent purity labels (USP, NSF, ConsumerLab, or Eurofins) to ensure the product is free from heavy metals, solvents, and contaminants.
- Form Bioavailability: Ensure the form matches evidence-supported configurations (e.g. standardized active extracts like bacosides, withanolides, or curcuminoids) for optimal onset and digestion tolerance.
Compare herbs
Safety first · Harm reduction
This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.
Learn how we evaluate confidence, safety, and intensity on the methodology page.
Editorial Review
Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.
Free safety checklist
Get the Garlic Allium Sativum research notes
Evidence summaries, dosing context, and safety updates for this herb — straight to your inbox.
We use your email to send the checklist and occasional evidence-first supplement updates. Unsubscribe anytime. Privacy policy.
Botanical profile context
How to interpret Garlic Allium Sativum
Garlic dosage ranges, effects, drug interactions, and harm-reduction safety guide for cardiovascular. Moderate Human Evidence research evidence. Use this herb profile as a starting point for evidence review, not as a recommendation to start a new supplement. Botanical products can vary by plant part, extract ratio, standardization, dose, and contaminant testing, so two labels with the same common name may not behave the same way.
When reviewing Garlic Allium Sativum, compare the traditional-use context against the human evidence, mechanism notes, and safety cautions. Pay special attention to pregnancy, breastfeeding, liver or kidney disease, blood-pressure effects, sedation, stimulation, anticoagulant use, antidepressants, and any prescription medication overlap.
For product decisions, prefer transparent labels, named extracts, clear serving sizes, and third-party quality testing. Avoid treating a long list of possible mechanisms as proof that an herb will solve a specific condition.