Big ingredient names.
Plain-English answers.
Your bathroom shelf doesn’t need a chemistry degree. Meet selected ingredient topics from our clinical reference, explained without turning skincare into another job.
Know the role.
Skip the ingredient bingo.
Adapted from The Prescribed’s Prescription Skincare Guide, this page explains selected non-prescription ingredient topics from its A-Z reference. The finished formulation, how you use it and your skin’s needs all matter. This is education, not a formula list or a personalised treatment plan.
Arbutin.
An ingredient studied for its effects on pigment pathways. Alpha-arbutin and beta-arbutin are different forms.
Keep in mind: Irritation or contact allergy can occur. Identity, purity and the finished formula matter; pregnancy and breastfeeding need individual advice.
Reference: SCCS arbutin assessment ↗Copper peptide · GHK-Cu.
A peptide-copper complex discussed in skincare for skin-conditioning purposes.
Keep in mind: Evidence is limited and depends on the form and concentration studied. A stock-solution percentage is not the same as a pure-active percentage. Irritation is possible.
Reference: Cosmetic Ingredient Review ↗Glycolic acid.
An AHA that promotes surface exfoliation.
Keep in mind: Stinging, peeling and irritation can occur. pH changes how a formula behaves, so percentage alone does not tell the whole story. AHAs can increase sun sensitivity.
Reference: FDA AHA guidance ↗Hyaluronic acid.
A humectant that attracts water. Its form, molecular weight and concentration also affect a product’s texture.
Keep in mind: A higher percentage is not automatically better. Some formulas feel tacky or pill, and the ingredient or base can still irritate.
Reference: HA study ↗Kojic acid.
An ingredient used in products intended to improve the appearance of uneven tone.
Keep in mind: Irritation and allergic contact reactions are possible. Sensitive or damaged skin needs particular care; suitability depends on the whole formula.
Reference: SCCS kojic acid assessment ↗Lactic acid.
An AHA with both exfoliating and water-attracting properties.
Keep in mind: It can sting, peel or irritate, especially on broken skin. Avoid piling on extra exfoliants, and take sun protection seriously.
Reference: FDA AHA guidance ↗L-ascorbic acid.
The unmodified form of vitamin C, used for its antioxidant properties.
Keep in mind: It may sting, particularly in acidic formulas. Stability, packaging and the finished formulation matter; it is not interchangeable with every vitamin C derivative.
Reference: American Academy of Dermatology ↗Niacinamide.
Also called nicotinamide. A vitamin B3 derivative discussed for barrier support and the appearance of uneven tone and fine lines.
Keep in mind: Often well tolerated, but redness, stinging or contact reactions can occur. An individual ingredient study does not validate every combination.
Reference: Niacinamide study ↗Salicylic acid.
A keratolytic ingredient: it helps loosen surface scale.
Keep in mind: Dryness, burning and peeling can occur. Ask for advice about salicylate allergy, broken skin or large treatment areas, and follow the specific product directions.
Reference: DermNet ↗Urea.
A humectant that can also help soften and loosen thickened surface skin, depending on the formulation.
Keep in mind: It can sting cracked or inflamed skin. Strength, treatment area and other products affect suitability.
Reference: Urea product information ↗Vitamin C · VC-IP.
An oil-soluble vitamin C derivative discussed for antioxidant and uneven-tone skincare goals.
Keep in mind: It is distinct from L-ascorbic acid. Results from one studied concentration cannot establish the benefits of a different strength or blend. Local reactions remain possible.
Reference: VC-IP study ↗Vitamin E.
A name covering related forms used in skincare, including tocopherol and tocopheryl acetate.
Keep in mind: The exact form matters, and contact allergy is possible. Evidence about oral supplements does not establish what a topical formula will do.
Reference: Vitamin E safety assessment ↗Vitamin A.
One family, several forms. Non-prescription skincare may contain retinol, retinal (retinaldehyde) or retinyl esters, such as retinyl palmitate. These forms are not interchangeable: the ingredient, formulation and packaging affect how a product behaves. A higher percentage does not automatically make a product a better fit.
Keep in mind: Dryness, redness, peeling and irritation can occur. Follow the product directions, avoid stacking irritating products and use sun protection. Avoid topical vitamin A products during pregnancy or when planning pregnancy; ask your clinician about breastfeeding. Retinal has specific Australian import and manufacturing requirements, so check products are lawfully supplied.
Reference: DermNet · vitamin A forms and precautions ↗Australian retinal requirements · AICIS ↗
Hydroquinone.
A medicine that reduces melanin production, used for certain forms of excess pigmentation. In Australia, external skin preparations containing 2% or less fall within Schedule 2 (Pharmacy Medicine). This does not establish that a particular product is approved, available or suitable for you. This entry concerns that non-prescription category only.
Keep in mind: Ask a pharmacist about suitability and follow the specific product label. Irritation and contact allergy can occur; prolonged or inappropriate use can cause persistent blue-black skin discolouration (ochronosis). Pregnancy and breastfeeding need professional advice. Changing or unexplained pigmentation should be assessed before treatment. This is not a recommendation for ongoing use or an offer to supply a product.
Reference: DermNet · hydroquinone ↗Australian scheduling · Poisons Standard October 2026 ↗
SPF deserves
its own spot.
SPF is a protection rating, not an ingredient. Cancer Council recommends broad-spectrum, water-resistant SPF50 or SPF50+ sunscreen as part of sun protection.
Apply 20 minutes before going outside. Reapply every two hours outdoors and after swimming, sweating or towel drying. Follow the label and use enough product.
Combine sunscreen with protective clothing, a broad-brimmed hat, shade and sunglasses. No sunscreen provides complete protection.
Read Cancer Council’s sunscreen guidance ↗Before you add another bottle.
Do I need all of these ingredients?
No. These are explanations, not recommendations to use every ingredient. Your routine can be simple and still be considered.
Can I layer everything together?
Don’t assume that you need to. Overlapping exfoliating or irritating products can make a routine harder to tolerate. Bring your current products to your consultation so your clinician can help review the whole picture.
What if a product stings or causes a rash?
Stop the product and seek advice if irritation persists or a rash develops. Severe swelling, trouble breathing or other signs of a serious allergic reaction require urgent medical attention.
Are these the ingredients in The Prescribed products?
These topics come from the ingredient reference in our Prescription Skincare Guide. Their inclusion does not mean that every product contains them or that every ingredient is suitable for you. Refer to your individual product information and clinical advice.
Why aren’t all treatment ingredients listed here?
This guide covers selected skincare ingredients. Some skin treatments require a prescription and individual clinical assessment. Your clinician can explain other treatment options, including their potential benefits, risks and suitability, during your consultation. This page does not list or promote specific prescription medicines.
Less fuss, better skincare.
You don’t need to memorise any of this before you book. A conversation about your skin and current routine is a good place to start.
LET’S TALK SKIN ↗Clinical enquiries: Ashleigh Schwarz, Nurse Practitioner, AHPRA NMW0001473067, The Derm Clinic, Kingscliff NSW. Clinician qualifications and contact details.
SOURCES & SCOPEGeneral educational information, not diagnosis or individual treatment advice. Suitability depends on the person and the finished product. This guide does not promote a specific prescription medicine or recommend self-treatment.
Editorial source: The Prescribed - Prescription Skincare Guide, clinical review edition, 15 October 2026, ingredient reference pages 16-28. Selected topics are adapted into plain English, with additional vitamin A and non-prescription hydroquinone education supported by the linked references; formulation strengths, prescribing instructions and prescription-medicine entries are not reproduced here. Research and safety references are linked on each card. These sources do not validate a particular compounded blend. Sunscreen advice remains linked to Cancer Council above. Draft content for clinical review before public launch.