‘r’
- rabdosia rubescens
- radish
- raspberry ketone
- rauvolfia vomitoria
- rauwolscine
- red clover
- red maple
- red raspberry
- red sandalwood
- red soapwort
- red yeast rice
- red-spur valerian
- reed herb
- rehmannia
- reishi mushroom
- resveratrol
- rhatany
- rhodiola
- rhubarb
- riboflavin
- ribose
- rice bran
- rice bran arabinoxylan compound
- rice protein
- rna and dna
- rock rose
- roman chamomile
- rooibos
- rose geranium oil
- rose hip
- rosemary
- rosinweed
- royal jelly
- rue
- rupturewort
- rusty-leaved rhododendron
- rutin
- rye grass