- O-aminophenol
- O-cymen-5-ol
- O-phenylphenol
- Ocimum basilicum extract
- Ocimum basilicum flower/leaf extract
- Ocimum basilicum leaf extract
- Ocimum basilicum oil
- Ocimum sanctum leaf extract
- Ocimum sanctum leaf powder
- Ocimum tenuiflorum extract
- Octenidine hcl
- Octocrylene
- Octoxynol-1
- Octoxynol-10
- Octoxynol-11
- Octoxynol-12
- Octoxynol-13
- Octoxynol-3
- Octoxynol-40
- Octoxynol-5
- Octoxynol-9
- Octrizole
- Octydodecyl bis-hydroxypropyl dimethicone citrate crosspolymer
- Octyl salicylate
- Octyldodecanol
- Odontella aurita extract
- Oenothera biennis flower extract
- Oenothera biennis flower/leaf/stem extract
- Oenothera biennis leaf cell extract
- Oenothera biennis leaf extract
- Oenothera biennis oil
- Oenothera biennis root extract
- Oenothera biennis seed
- Oenothera biennis seed extract
- Oenothera biennis sprout extract
- Olaflur
- Olea europaea bark extract
- Olea europaea flower extract
- Olea europaea fruit
- Olea europaea fruit extract
- Olea europaea fruit juice
- Olea europaea fruit oil
- Olea europaea fruit unsaponifiables
- Olea europaea fruit water
- Olea europaea husk oil
- Olea europaea husk powder
- Olea europaea leaf
- Olea europaea leaf cell extract
- Olea europaea leaf extract
- Olea europaea leaf oil
- Olea europaea leaf powder
- Olea europaea oil unsaponifiables
- Olea europaea sap extract
- Olea europaea seed
- Olea europaea seed powder
- Oleamidopropyl betaine
- Oleic acid
- Oleyl betaine
- Olivamidopropyl betaine
- Olivine
- Olus oil
- Onopordum acanthium flower/leaf/stem extract
- Onosma hispidum root extract
- Onsen-sui
- Ophiopogon japonicus root extract
- Opuntia coccinellifera flower extract
- Opuntia coccinellifera fruit extract
- Opuntia ficus-indica callus culture extract
- Opuntia ficus-indica extract
- Opuntia ficus-indica flower extract
- Opuntia ficus-indica fruit extract
- Opuntia ficus-indica fruit juice
- Opuntia ficus-indica fruit water
- Opuntia ficus-indica seed oil
- Opuntia ficus-indica stem
- Opuntia ficus-indica stem extract
- Opuntia stricta seed oil
- Opuntia tuna flower/stem extract
- Opuntia tuna fruit extract
- Opuntia vulgaris extract
- Orbignya martiana seed oil
- Orbignya oleifera seed oil
- Orbignya speciosa kernel oil
- Orchid extract
- Orchis mascula extract
- Orchis mascula flower extract
- Orchis morio flower extract
- Origanum dictamnus flower/leaf/stem extract
- Origanum heracleoticum flower oil
- Origanum majorana flower oil
- Origanum majorana flower/leaf/stem oil
- Origanum majorana herb extract
- Origanum majorana herb oil
- Origanum majorana leaf extract
- Origanum majorana leaf oil
- Origanum majorana leaf water
- Origanum majorana oil
- Origanum vulgare extract
- Origanum vulgare flower extract
- Origanum vulgare flower/leaf/stem extract
- Origanum vulgare flower/leaf/stem water
- Origanum vulgare leaf
- Origanum vulgare leaf extract
- Origanum vulgare leaf oil
- Origanum vulgare oil
- Ormenis multicaulis extract
- Ormenis multicaulis oil
- Ornithogalum umbellatum bulb extract
- Ornithogalum umbellatum flower extract
- Orthosiphon stamineus extract
- Orthosiphon stamineus leaf extract
- Oryza sativa bran
- Oryza sativa bran cera
- Oryza sativa bran extract
- Oryza sativa bran oil
- Oryza sativa bran oil extract
- Oryza sativa bran sterol
- Oryza sativa cera
- Oryza sativa extract
- Oryza sativa germ oil
- Oryza sativa germ powder
- Oryza sativa hull extract
- Oryza sativa hull powder
- Oryza sativa kernel
- Oryza sativa leaf extract
- Oryza sativa leaf/stem extract
- Oryza sativa lees extract
- Oryza sativa powder
- Oryza sativa seed oil
- Oryza sativa seed protein
- Oryza sativa seed water
- Oryza sativa starch
- Osmanthus fragrans extract
- Osmanthus fragrans flower extract
- Ostrea edulis extract
- Ostrea shell extract
- Ostrea shell powder
- Ovum oil
- Oxalic acid
- Oxalis tetraphylla extract
- Oxirane
- Oxycoccus palustris seed oil
- Oxygen
- Oxyquinoline
- Oxyquinoline sulfate
- Oyster extract
- Ozonized sunflower seed oil