Cumulative level test: Law, specialised surfaces and clinical boundaries: deciding what a cosmetic can answer

Check understanding, separately from reading

12 questions · 80% to pass · no timer. This longer test revisits both units in the level. These authored questions assess recognition and application of the taught distinctions, not professional qualification. You may review the lessons and retry. Repeat attempts reuse the question bank; a remembered answer is not proof of transfer to a new situation.

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Question 1

A learner says she only buys cosmetics that are 'FDA approved'. Which statement correctly describes what United States law actually provides for a moisturiser?Cosmetics are not approved before sale; since 2022 the responsible person must register facilities, list products and ingredients, report serious adverse events and hold safety substantiation records, but no pre-market authorisation is grantedThe FDA reviews and approves each cosmetic formulation before it can be sold, which is why products carry an approval number

Question 2

A device sold online is described as 'FDA registered' and 'clinically proven to boost collagen'. It is a 1.5 mm microneedling roller for home use. What is the accurate assessment?Registration means the device has been reviewed by the FDA, so home use at 1.5 mm is acceptable if the instructions are followedThe FDA has not authorised any microneedling medical device for over-the-counter sale, registration is a facility or listing status rather than a device clearance, and a 1.5 mm roller penetrates deeply enough to carry infection and pigment risk

Question 3

A learner compares a European sunscreen labelled SPF 50+ with a United States product labelled SPF 100 and assumes the American product offers twice the protection. What is the sound correction?The European frame caps the displayed value at 50+ while the United States allows higher numbers, and beyond about SPF 50 the marginal UVB benefit is small, so the difference in labels overstates the difference in protectionSPF 100 provides twice the protection of SPF 50, so the American product is the stronger choice for a person at high risk of skin cancer

Question 4

A learner notices that her American sunscreen contains zinc oxide and titanium dioxide while her European one lists bemotrizinol and drometrizole trisiloxane. She concludes the American product is the safer 'physical' option. How should this be assessed?Mineral filters are chemically inert and therefore safer than organic filters, which enter the bloodstream and disrupt hormonesBoth are regulated filter systems with different available molecules, the newer organic filters are permitted in the European Union on the basis of a safety dossier, and no evidence establishes that mineral filters are safer at the population level, so the choice turns on UVA performance, cosmetic acceptability and tolerance

Question 5

A learner develops nail-fold itching, two lifting nail plates and eyelid eczema after switching from lacquer to UV-cured gel. She has a dental appointment for a composite filling next month. What should the appraisal include?Methacrylate allergy is the leading explanation, the eyelid involvement is consistent with transfer from fingers, patch testing should identify the specific monomer, and the dental exposure makes identification clinically useful rather than cosmeticThe eyelid eczema must come from eye makeup, because nail products cannot affect skin they never touch, and the dental appointment is unrelated

Question 6

A learner's lower lip has had a crusted, non-healing area for eight weeks. She has been exfoliating it with a sugar scrub and applying a peppermint balm. What is the correct response?The crust is dead skin from a damaged barrier, so gentle exfoliation twice weekly and a medicated balm will resolve itA persistent lip lesion needs clinical examination rather than exfoliation, because the differential includes actinic cheilitis and other conditions that a cosmetic routine cannot address, and mechanical irritation may worsen it

Question 7

A learner reports itching that began three months ago, is generalised, disturbs sleep and is accompanied by unintentional weight loss. She has no rash. What is the correct action?This combination of chronic generalised pruritus without rash plus systemic symptoms requires prompt medical assessment, because the differential includes haematological, hepatic, renal and endocrine diseaseGeneralised itch with no rash is xerosis until proven otherwise, so a twelve-week trial of an occlusive ointment is the appropriate first step

Question 8

A learner reads that a 'hair growth serum' contains caffeine, biotin and peptides, and that a randomised trial of a low-level laser comb increased terminal hair density. She has patterned thinning at the temples. What is the accurate appraisal?Because a laser device increased hair density in a randomised trial, the serum and the comb are interchangeable options and the cheapest should be chosenPatterned thinning with miniaturisation suggests androgenetic alopecia, for which topical minoxidil and oral finasteride are the two FDA-approved drugs, while the serum has no established mechanism for reversing miniaturisation and the laser evidence comes from a network meta-analysis with short follow-up and commercial sponsorship to check

Question 9

A learner asks why her dermatologist wants to look at her scalp with a magnifier before deciding about treatment, when the shedding has already been going on for four months. What is the best explanation?Magnified examination distinguishes hair diameter diversity and miniaturisation from uniform diffuse shedding, which separates pattern loss from telogen effluvium and changes whether treatment is aimed at a chronic androgen-driven process or at recovery from a triggerThe magnifier is used to check for product residue and poor scalp hygiene, which are the usual causes of shedding

Question 10

A learner has a single dark patch on the cheek that appeared after a healed spot, and a friend tells her it is melasma and that she needs prescription creams. What is the correct appraisal?Any dark facial patch is melasma, so prescription-strength lightening should be started before the pigment becomes permanentA mark confined to the site of previous inflammation is more consistent with post-inflammatory hyperpigmentation, which usually fades over months and does not require hydroquinone, whereas melasma is symmetrical, photodistributed and chronic

Question 11

A learner taking amiodarone develops a burning erythema on the face and hands after a bright weekend, and a friend advises her to stop the tablet until the skin settles. What is the correct response?She should contact the prescriber rather than stop a cardiac medicine, because the reaction is a drug-related phototoxicity that is managed by dose review, photoprotection and clinical monitoring, and amiodarone persists in tissue for a long time after any changeStopping the drug immediately is the priority, since removing the photosensitiser is the only reliable way to prevent further reactions

Question 12

A learner wants to test whether a retinoid improves the texture of her right cheek. She plans four two-week periods, alternating the product and a plain moisturiser, with a one-week gap, photographs taken by a friend who does not know the schedule, and a decision rule written down beforehand. What is the main remaining threat to her conclusion?There is no remaining threat, because alternating periods with blinding and a pre-specified rule is the strongest design available and removes all biasCarryover: retinoid effects on the epidermis persist for weeks, so a one-week washout may leave activity in the control periods and shrink the observed difference, which biases the test toward finding nothing

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