Grade: A (Strong Scientific Evidence)
Therapy	Specific therapeutic Use(s)
Policosanol	Platelet aggregation inhibition
Vitamin K	Hemorrhagic disease of newborn (vitamin K deficiency bleeding / VKDB)
Grade: C (Unclear or Conflicting Scientific Evidence)
Therapy	Specific therapeutic Use(s)
Aortic acid	Vein clots (deep vein thrombosis)
Garlic	Anti-platelet effects (blood thinning)
Ginger	Anti-platelet agent
Grape seed	Inhibition of platelet aggregation
Pycnogenol	Platelet aggregation
Rutin	Thrombosis
Seaweed, kelp, bladderwrack	Anticoagulant (blood-thinner)
Turmeric	Blood clot prevention
Vitamin E	Venous thromboembolism (VTE)
Yohimbe bark extract	Inhibition of platelet aggregation
Grade: D (Fair Negative Scientific Evidence)
Therapy	Specific therapeutic Use(s)
Boron	Prevention of blood clotting (coagulation effects)
Traditional or Theoretical Uses which Lack Sufficient Evidence
Therapy	Specific therapeutic Use(s)
Acacia	Blood clots
Acerola	Blood clot prevention
Aconite	Phlegmasia alba dolens (milk leg syndrome)
Alfalfa	Blood clotting disorders
Aloe	Blood vessel disorders
Alpinia	Antiplatelet
Aortic acid	Anticoagulant (blood thinner)
Arabinogalactan	Blood thinner
Arginine	Anti-platelet agent
Arnica	Pulmonary embolism
Astragalus	Blood thinner
Babassu	Antithrombotic (blood thinning)
Bear's garlic	Antiplatelet (blood thinner)
Black currant	Antithrombotic (blood thinner)
Boldo	Anticoagulant (blood thinner)
Bromelain	Blood clot treatment
Burdock	Blood thinner
Calamus	Blood flow disorders (ischemia)
Calendula	Blood vessel clots
Chamomile	Anticoagulant
Chia	Anticoagulant (blood thinner)
Chitosan	Blood clotting disorders
Chondroitin sulfate	Anticoagulant (blood thinner)
Cinnamon	Anticoagulant (blood thinner)
Clove	Blood thinner
Codonopsis	Blood circulation
Coleus	Thrombosis (blood clots)
Cowhage	Anticoagulant (blood thinner)
Danshen	Antiphospholipid syndrome
Desert parsley	Anticoagulant (blood thinning)
Dong quai	Blood flow disorders
Elderberry and elder flower	Blood vessel disorders
Feverfew	Blood vessel disorders (antiangiogenic)
Flaxseed and flaxseed oil	Blood thinner
Gamma oryzanol	Anticoagulant
Ginger	Blood circulation
Ginkgo	Blood clots
Goldenseal	Anticoagulant (blood thinning)
Green tea	Inhibition of platelet aggregation
Guarana	Platelet aggregation inhibition
Horny goat weed	Platelet aggregation inhibition
Horse chestnut	Lung blood clots (pulmonary embolism)
Horseradish	Anticoagulant (blood thinner)
Jequirity	Anti-platelet agent
Jiaogulan	Anticoagulant (blood thinner)
Kudzu	Antithrombotic (blood clots)
L-Carnitine	Blood circulation
Lemongrass	Anticoagulant
Liver extract	Blood clots
Meadowsweet	Anticoagulation
Mistletoe	Coagulation disorders
Modified citrus pectin	Anti-thrombotic
Niacin	Blood circulation improvement
Nopal	Platelet aggregation
Octacosanol	Platelet aggregation inhibition (blood disorder)
Omega-3 fatty acids, fish oil, alpha-linolenic acid	Anticoagulation
Onion	Antiplatelet (blood thinning)
Peony	Blood clots
Populus	Antiplatelet (blood thinner)
Propolis	Anticoagulant
Pycnogenol	Venous thromboembolism (VTE)
Quercetin	Anti-thrombotic
Red yeast rice	Blood circulation problems
Rehmannia	Blood clotting disorders
Reishi mushroom	Anti-platelet effects
Resveratrol	Antiplatelet
Rhubarb	Anticoagulation
Rosemary	Anticoagulant (blood-thinning)
Rutin	Anticoagulant (dicoumarin damage)
Safflower	Anticoagulant (blood-thinning)
Sage	Coagulation disorders
Sassafras	Anticoagulant (blood thinner)
Sea buckthorn	Antiplatelet
Soy	Antithrombotic (preventing clots)
Strawberry	Anticoagulant (blood-thinner)
Tamanu	Anticoagulant
Taurine	Platelet aggregation inhibition
Usnea	Anticoagulant (blood thinning)
Wasabi	Anti-platelet agent (blood thinner)
Wheatgrass	Blood flow disorders
Willow bark	Antiplatelet
Yarrow	Blood clots
Yew	Blood clot treatment