common garlic

garlic (Allium sativum)

Entire Monograph

Reported Uses

NOTE: see Herb & Supplement Effectiveness Rating Definitions table
allergic rhinitis [Insufficient Evidence]
alopecia areata [Insufficient Evidence]
angina, unstable [Insufficient Evidence]
asthma [Insufficient Evidence]
atherosclerosis [Possibly Effective]
athletic performance [Insufficient Evidence]
bladder CA [Insufficient Evidence]
BPH [Insufficient Evidence]
bronchitis [Insufficient Evidence]
cancer prevention, breast [Insufficient Evidence]
cancer prevention, colorectal [Insufficient Evidence]
cancer prevention, esophageal [Insufficient Evidence]
cancer prevention, gastric [Possibly Ineffective]
cancer prevention, lung [Insufficient Evidence]
candidiasis, oropharyngeal [Insufficient Evidence]
candidiasis, vulvovaginal [Insufficient Evidence]
cardiovascular disease [Insufficient Evidence]
chronic fatigue syndrome [Insufficient Evidence]
common cold [Insufficient Evidence]
corns [Insufficient Evidence]
coronary heart disease [Insufficient Evidence]
COVID-19 [Insufficient Evidence]
cystic fibrosis [Insufficient Evidence]
dental hypersensitivity [Insufficient Evidence]
denture stomatitis [Insufficient Evidence]
diabetes mellitus [Possibly Effective]
diabetic retinopathy [Insufficient Evidence]
diarrhea [Insufficient Evidence]
dysmenorrhea [Insufficient Evidence]
endometriosis [Possibly Effective]
erectile dysfunction [Insufficient Evidence]
exercise-induced muscle soreness [Insufficient Evidence]
familial hypercholesterolemia [Insufficient Evidence]
fatigue [Insufficient Evidence]
fibrocystic breast disease [Insufficient Evidence]
gastritis [Insufficient Evidence]
gout [Insufficient Evidence]
hepatitis [Insufficient Evidence]
hepatopulmonary syndrome [Insufficient Evidence]
H. pylori infection [Possibly Ineffective]
HTN [Possibly Effective]
hyperlipidemia [Possibly Effective]
influenza [Insufficient Evidence]
lead toxicity [Insufficient Evidence]
metabolic dysfunction-associated steatotic liver disease [Possibly Effective]
metabolic syndrome [Insufficient Evidence]
mosquito repellent [Insufficient Evidence]
multiple myeloma [Insufficient Evidence]
muscle strength [Insufficient Evidence]
obesity [Insufficient Evidence]
onychomycosis [Insufficient Evidence]
osteoarthritis [Insufficient Evidence]
otitis media [Insufficient Evidence]
periodontitis [Possibly Effective]
peripheral arterial disease [Insufficient Evidence]
polycystic ovary syndrome [Insufficient Evidence]
pre-eclampsia [Insufficient Evidence]
premenstrual syndrome [Insufficient Evidence]
prostate CA [Insufficient Evidence]
rheumatoid arthritis [Insufficient Evidence]
scleroderma [Insufficient Evidence]
stress [Insufficient Evidence]
tick repellent [Insufficient Evidence]
tinea capitis [Insufficient Evidence]
tinea corporis [Insufficient Evidence]
tinea cruris [Insufficient Evidence]
tinea pedis [Insufficient Evidence]
trichomoniasis [Insufficient Evidence]
tuberculosis [Insufficient Evidence]
UTI [Insufficient Evidence]
warts [Insufficient Evidence]
wound healing [Insufficient Evidence]

Reported Doses

Safety/efficacy may not be established; reported doses may be derived from limited or potentially inadequate studies with variable regimens, multi-ingredient products, or where concentration of active ingredients may vary widely

Special Note

[formulation clarification]
Info: active constituents may include allicin, ajoene, other organosulfur compounds

Effectiveness Ratings

[see Herb & Supplement Effectiveness Rating Definitions table]

alopecia areata

[Insufficient Evidence]
Dose: apply 5% gel topically qid; Info: used with topical corticosteroid

angina, unstable

[Insufficient Evidence]
Dose: 60 mg IV qd

atherosclerosis

[Possibly Effective]
Dose: 900 mg/day garlic powder PO divided qd-tid; Alt: 300 mg garlic powder PO x1; 150 mg garlic powder PO bid; 250 mg aged garlic extract PO qd; 1200 mg aged garlic extract PO qd-bid

athletic performance

[Insufficient Evidence]
Dose: 900 mg PO x1 before exercise

BPH

[Insufficient Evidence]
Dose: 1 mg/kg/dose garlic extract PO qd

cancer prevention, colorectal

[Insufficient Evidence]
Dose: 2.4 mL aged garlic extract PO qd

candidiasis, oropharyngeal

[Insufficient Evidence]
Dose: apply paste topically qid

candidiasis, vulvovaginal

[Insufficient Evidence]
Dose: apply cream PV qhs

cardiovascular disease

[Insufficient Evidence]
Dose: 250 mg aged black garlic extract PO qd

common cold prevention

[Insufficient Evidence]
Dose: 180 mg allicin PO qd; Alt: 14 mg garlic powder PO qd

corns

[Insufficient Evidence]
Dose: apply liquid extract topically bid

coronary heart disease

[Insufficient Evidence]
Dose: 800-2000 mg PO qd

COVID-19

[Insufficient Evidence]
Dose: 50 mg garlic oil PO bid x10 days; Info: used with standard tx

denture stomatitis

[Insufficient Evidence]
Dose: 40 mg/mL mouthwash swish/spit tid

diabetes mellitus

[Possibly Effective]
Dose: 600-1500 mg/day garlic powder PO divided bid-tid; Alt: 8.2 mg garlic oil PO qd; 1000 mg aged garlic extract PO qd; Info: used with or without metformin

diabetic retinopathy

[Insufficient Evidence]
Dose: 1 g garlic powder PO qd

endometriosis

[Possibly Effective]
Dose: 400 mg garlic powder PO qd; Info: used with standard tx

erectile dysfunction

[Insufficient Evidence]
Dose: 5 g/150 mL garlic juice PO bid; Info: used with tadalafil

exercise-induced muscle soreness

[Insufficient Evidence]
Dose: 80 mg allicin PO qd

fibrocystic breast disease

[Insufficient Evidence]
Dose: 150 mg garlic powder PO bid

gastritis

[Insufficient Evidence]
Dose: 150 mg garlic powder PO bid

hepatitis

[Insufficient Evidence]
Dose: 150-300 mg garlic oil PO qd

hepatopulmonary syndrome

[Insufficient Evidence]
Dose: 1-2 g/m^2/day garlic oil PO divided bid

HTN

[Possibly Effective]
Dose: 300-1500 mg/day garlic powder PO divided qd-tid; Alt: 2400 mg garlic powder PO x1; 500 mg garlic oil PO qd; 960-7200 mg/day aged garlic extract PO divided qd-tid

hyperlipidemia

[Possibly Effective]
Dose: 600-7200 mg/day aged garlic extract or garlic powder PO divided bid-tid; Alt: 300 mg garlic powder PO bid; 1200 mg PO qd; 250 mg aged garlic extract PO qd; 500 mg garlic oil PO qd

influenza

[Insufficient Evidence]
Dose: 14 mg garlic powder PO qd

lead toxicity

[Insufficient Evidence]
Dose: 400 mg garlic powder PO tid

metabolic dysfunction-associated steatotic liver disease

[Possibly Effective]
Dose: 800-1600 mg garlic powder PO qd; Alt: 400-800 mg garlic powder PO bid

metabolic syndrome

[Insufficient Evidence]
Dose: 5000-20,000 mg raw garlic PO qd; Alt: 240-6000 mg aged garlic extract PO qd; 188-6000 mg garlic powder PO qd; 2.34 mg ajoene PO qd

obesity

[Insufficient Evidence]
Dose: 1600 mg garlic powder PO qd

osteoarthritis

[Insufficient Evidence]
Dose: 500 mg PO bid

periodontitis

[Possibly Effective]
Dose: 1200 mg aged garlic extract PO bid

peripheral arterial disease

[Insufficient Evidence]
Dose: 400 mg PO bid

polycystic ovary syndrome

[Insufficient Evidence]
Dose: 800 mg PO qd; Alt: 500 mg PO bid

premenstrual syndrome

[Insufficient Evidence]
Dose: 400 mg dried garlic powder PO qd

prostate CA

[Insufficient Evidence]
Dose: 1 mg/kg/dose garlic extract PO qd

rheumatoid arthritis

[Insufficient Evidence]
Dose: 500 mg dried garlic PO bid

tick repellent

[Insufficient Evidence]
Dose: 1200 mg PO qd

tinea corporis

[Insufficient Evidence]
Dose: apply 0.6% ajoene gel topically bid

tinea cruris

[Insufficient Evidence]
Dose: apply 0.6% ajoene gel topically bid

tinea pedis

[Insufficient Evidence]
Dose: apply 0.4-1% ajoene gel topically bid

warts

[Insufficient Evidence]
Dose: apply liquid extract topically bid

wound healing

[Insufficient Evidence]
Dose: apply 30% ointment topically bid