Strong evidence
An approved medicine, or consistent good-quality trials and reviews.
Acremonium
Acremonium chrysogenum
Arabica coffee
Coffea arabica
Asian rice
Oryza sativa
Aspergillus terreus
Aspergillus terreus
Atlantic horseshoe crab
Limulus polyphemus
Autumn crocus
Colchicum autumnale
Baker's and brewer's yeast
Saccharomyces cerevisiae
Bishop's weed
Ammi majus
Calabar bean
Physostigma venenosum
Caucasian snowdrop
Galanthus woronowii
Chilli pepper
Capsicum annuum
Chinese ephedra (Ma huang)
Ephedra sinica
Coca
Erythroxylum coca
Corkwood
Duboisia myoporoides
Daffodil
Narcissus pseudonarcissus
Deadly nightshade
Atropa bella-donna
Domestic silkmoth
Bombyx mori
English yew (European yew)
Taxus baccata
Ergot
Claviceps purpurea
Fleming's penicillin mould
Penicillium rubens
Foxglove
Digitalis purpurea
Gila monster
Heloderma suspectum
Glarea lozoyensis
Glarea lozoyensis
Happy tree
Camptotheca acuminata
Hemp (Cannabis)
Cannabis sativa
Himalayan mayapple
Sinopodophyllum hexandrum
Indian snakeroot
Rauvolfia serpentina
Ipecacuanha
Carapichea ipecacuanha
Jaborandi
Pilocarpus microphyllus
Japanese plum yew
Cephalotaxus harringtonia
Jararaca
Bothrops jararaca
Madagascar periwinkle
Catharanthus roseus
Magician's cone snail
Conus magus
Mayapple
Podophyllum peltatum
Opium poppy
Papaver somniferum
Pacific yew
Taxus brevifolia
Penicillium griseofulvum
Penicillium griseofulvum
Pineapple
Ananas comosus
Psyllium (Blond plantain)
Plantago ovata
Quinine tree
Cinchona officinalis
Red cinchona
Cinchona pubescens
Red yeast rice mould
Monascus purpureus
Sangre de grado
Croton lechleri
Senna
Senna alexandrina
Soapbark
Quillaja saponaria
Spanish fly
Lytta vesicatoria
St John's wort
Hypericum perforatum
Sugarcane
Saccharum officinarum
Summer snowflake
Leucojum aestivum
Sweet wormwood
Artemisia annua
Swizzle-stick
Rauvolfia vomitoria
Tobacco
Nicotiana tabacum
Tolypocladium
Tolypocladium inflatum
Woolly foxglove
Digitalis lanata
Yellow cinchona
Cinchona calisaya