| Benzyl Alcohol | Preservative/Solvent | ⚠️ Yes — Benzyl Alcohol | A preservative and solvent used in injectable and topical formulations. |
| Cetyl Alcohol | Emulsifier/Thickener | ⚠️ Yes — Cetyl Alcohol | A fatty alcohol used in topical formulations. Can cause contact dermatitis. |
| Cocoa Butter | Suppository Base | ⚠️ Yes — Chocolate | A fat derived from cocoa beans used as a melting base in suppositories and some topical formulations. May affect individuals with chocolate or cocoa sensitivity. |
| Coconut Oil | Emollient/Vehicle | ⚠️ Yes — Coconut | A plant-derived oil used as an emollient, vehicle, and solvent in topical and oral formulations. May be relevant for individuals with coconut allergy (rare but documented). |
| Methylparaben | Preservative | ⚠️ Yes — Parabens | A preservative used to prevent microbial growth. Can cause allergic contact dermatitis in sensitive individuals. |
| PEG-100 Monostearate | Emulsifier | ⚠️ Yes — PEG | A PEG-based emulsifier used to stabilize oil-in-water emulsions in creams and lotions. Contains a polyethylene glycol component. |
| Peg/ppg-18/18 Dimethicone | Emulsifier/Skin Conditioner | ⚠️ Yes — PEG | A silicone-based emulsifier combining PEG and polypropylene glycol with dimethicone. Used in topical formulations for smooth application. |
| Propylene Glycol? | Solvent/Humectant | ?Uncertain — Propylene Glycol | An organic compound used as a solvent and humectant. Can cause contact dermatitis in sensitive individuals. |
| Propylparaben | Preservative | ⚠️ Yes — Parabens | A paraben preservative used to prevent microbial growth. Can cause contact dermatitis in paraben-sensitive individuals. |
| .alpha.-tocopherol Acetate | Antioxidant | No | Vitamin E acetate. Used as an antioxidant to protect active ingredients from degradation during storage. |
| Ascorbic Acid | Antioxidant | No | Vitamin C. Used as an antioxidant to prevent degradation of active ingredients and as a pH adjuster. |
| Beta Carotene | — | No | — |
| Canada Balsam? | — | No | — |
| Carbomer Copolymer Type A (allyl Pentaerythritol Crosslinked)? | Thickener/Gelling Agent | No | A crosslinked acrylic acid copolymer used to create clear gels and thicken topical formulations. |
| Diisopropyl Adipate | Emollient | No | A synthetic ester used as a light emollient and skin-conditioning agent in topical formulations. |
| Edetate Disodium | Chelating Agent | No | Also known as EDTA. Binds metal ions to prevent degradation of active ingredients and preserve product stability. |
| Glyceryl Monostearate | Emulsifier | No | An emulsifier that helps oil and water mix in creams and ointments. Derived from glycerin and stearic acid. |
| Hamamelis Virginiana Top Water | Skin Conditioner | No | Witch hazel distillate, a plant-derived astringent used in topical formulations to soothe and tone the skin. |
| Mineral Oil | Emollient/Vehicle | No | A purified petroleum-derived oil used as an emollient and vehicle in topical formulations and as a lubricant in oral laxatives. |
| Octyldodecanol | Emollient/Solvent | No | A branched-chain fatty alcohol used as an emollient, solvent, and viscosity adjuster in topical formulations. |
| Petrolatum | Emollient/Barrier | No | Petroleum jelly (Vaseline). Used as a skin protectant, emollient, and ointment base in topical formulations. |
| Phenoxyethanol | Preservative | No | A synthetic preservative used to prevent microbial growth in topical and some oral formulations. Can cause skin irritation in sensitive individuals. |
| Safflower Oil | Emollient/Vehicle | No | A plant-derived oil used as an emollient and vehicle in topical and oral formulations. |
| Shea Butter | Emollient | No | A fat extracted from the nut of the African shea tree. Used as an emollient and moisturizer in topical formulations. Tree nut-derived — may be relevant for individuals with tree nut allergies. |
| Silicon Dioxide | Glidant | No | A mineral (silica) used to improve powder flow during tablet manufacturing. Also called colloidal silicon dioxide. |
| Trolamine | Emulsifier/pH Adjuster | No | Triethanolamine. Used as an emulsifier and pH adjuster in topical creams and lotions. |
| Vitamin E Polyethylene Glycol Succinate? | Solubilizer/Emulsifier | No | A water-soluble form of vitamin E (also called TPGS) used to improve the absorption of poorly soluble drugs. Contains a PEG component. |