Home' Australian Journal of Pharmacy : Jan Feb 2015 Contents SO WHICH SUNSCREEN IS BEST?
The best sunscreen for any consumer
is the sunscreen that they are willing
to use routinely and correctly. When
recommending a sunscreen it is all
about compliance. If the consumer
is looking for a day wear product,
they won’t need water resistance,
however for a day at the beach, water
resistance is a must. Sunscreens can
be recommended for the consumer
that address other concerns they
may have. For premature skin
ageing consider a sunscreen with
alpha hydroxy acids, for hirsute skin
consider an alcohol-based gel or
spray. If the consumer has a known
ingredient sensitivity, this should also
be taken into account, but remember
that for therapeutic sunscreens, only
actives and preservatives are listed on
the label. If in doubt, the sunscreen
company should be contacted.
Sunscreens contain actives,
preservatives and excipients.
Sunscreen actives can be chemical
or physical, are most often used
in combination, with none being
inherently better than any others.
Preservatives form a vital function
in sunscreens and ensure that the
product can stand up to consumer
challenge. Excipients support a
sunscreen’s performance, deliver
water resistance and film forming for
even coverage, while also modifying
the feel of the product.
How well a sunscreen performs
is determined by the sun protection
chosen; the higher the SPF the
better. Consumer application
and reapplication are also vital.
Consumers must use enough and
reapply it throughout the day; a
single application will not last all
day. In the end there is no one best
sunscreen. Ensuring consumers
apply a sunscreen is the priority, so
whichever sunscreen the consumer is
happy to wear regularly and correctly,
is the right one for them.
SPECIALTY PRACTICE SERIES Education
CONTINUING PROFESSIONAL DEVELOPMENT
1. Green A, et al. Daily sunscreen application
and betacarotene supplementation in
prevention of basal-cell and squamous-
cell carcinomas of the skin: a randomised
controlled trial. Lancet 1999; 354: 723-9.
2. Green A, et a;. Reduced melanoma after
regular sunscreen use: randomized trial follow-
up. J Clin Oncology 2011; 29:257-63.
3. Darlington S, et al. A randomized controlled
trial to assess sunscreen application and
beta carotene supplementation in the
prevention of solar keratoses. Arch Dermatol.
4. Hughes MC, et al. Sunscreen and
Prevention of Skin Aging. Ann Intern Med.
5. Gordon LG, et al. Regular sunscreen use
is a cost-effective approach to skin cancer
prevention in subtropical settings. J Invest
8. Hayden CG, et al. Systemic absorption of
sunscreen after topical application. Lancet
1997; 350: 863-4.
9. Jiang R, et al. Absorption of sunscreens
across human skin: an evaluation of
commercial products for children and adults.
Br J Clin Pharmacol. 1999; 48: 635-7.
10. Filipe P, et al. Stratum corneum is an
effective carrier to TiO2 and ZnO nanoparticle
percutaneous absorbtion. Skin Pharmacol &
Physiol. 2009; 22:266-75.
11. Prow TW, et al. Nanoparticles and
microparticles for skin drug delivery. Adv Drug
Deliv Rev. 2011; 63:470-91.
12. Lin LL, et al. Time correlated single photon
counting for simultaneous monitoring of zinc
oxide nanoparticles and NAD(P)H in intact and
barrier disrupted volunteer skin. Pharm Res.
13. Pinheiro T, et al. The influence of
corneocyte structure on the interpretation of
permeation profiles of nanoparticles across
skin. Nucl Instr and Meth in Phys Res B. 2007;
14. www .tga.gov.au/literature-review-
15. Australian Institute of Health and Welfare &
Australasian Association of Cancer Registries.
Cancer in Australia: an overview, 2012. Cancer
series no. 74. Cat. no. CAN 70. Canberra:
16. Australian Institute of Health and Welfare &
Cancer Australia. Non-melanoma skin cancer:
general practice consultations, hospitalisation
and mortality. Cancer series no. 43. Cat. no. 39 .
Canberra: AIHW, 2008.
17. Wright MW, et al. Mechanisms of sunscreen
failure. J Am Acad Dermatol. 2001 ;44:781-4.
18. Diffey BL. Sunscreens and UVA protection:
A major issue of minor importance. Photochem
Photobiol. 2001; 74(1):61-3.
20, Hall HI, et al. Sun protection behaviours of the
US white population. Prev Med. 1997; 26:401-7.
21. Diaz A, et al. The Children and Sunscreen
Study: A crossover trial investigating children’s
sunscreen application thickness and the
influence of age and dispenser type. Arch
Dermatol. 2012; 148:606-12.
62 | THE AUSTRALIAN JOURNAL OF PHARMACY VOL.96 JANUARY/FEBRUARY 2015
THE AUSTRALIAN JOURNAL OF PHARMACY VOL.96 JANUARY/FEBRUARY 2015 | 63
1. Regular sunscreen use has been
shown to be protective against:
A melanoma, squamous cell carcinoma,
dehydration and premature skin ageing.
B solar keratosis, melanoma, squamous
cell carcinoma, and cataracts.
C solar keratosis, melanoma, squamous
cell carcinoma, and premature skin
D basal cell carcinoma, melanoma,
premature skin ageing and squamous
2. In Australia, sunscreens are:
A regulated as cosmetics only.
B regulated as medicines and cosmetics.
C regulated as therapeutics only.
D not regulated.
3. In Australia, Avobenzone is known as:
C Parsol 1789.
D Butyl methoxydibenzoylmethane.
4. Methyl hydroxybenzoate and
A not used in sunscreens.
B the same preservative.
C the same sunscreen active.
D only permitted in cosmetic sunscreens.
5. The role of sunscreen actives in a
sunscreen is to:
A protect the sunscreen from consumer
B enable the sunscreen film to form
uniformly on the skin.
C ensure product stability for the shelf
life of the sunscreen.
D deliver SPF and broad spectrum
6. The best sunscreen is:
A one that contains only chemical actives.
B one that does not use preservatives.
C one the consumer is willing to wear
correctly and regularly.
D one that contains PABA.
7. The sunscreen active bemotrizinol
offers protection from:
A UVA only.
C UVA and UVB.
B UVB only.
D UVA II only.
8. To perform in a sunscreen, chemical
A must be fully dissolved in the sunscreen.
B must be uniformly dispersed
throughout the sunscreen.
C should not be combined with physical
D should be added at the maximum
amount that can be solubilised into
9. To perform in a sunscreen, physical
A must be uniformly dispersed
throughout the sunscreen.
B should only be used in their non-nano
C must be fully dissolved in the
D should only be used in preservative
10. In Australia, therapeutic sunscreens
are regulated by:
Specialty Practice Series
Sunscreens: What’s in them? // This article attracts up to 1.5 Group Two CPD credits.
Accreditation number: CX140078. Each question has only one CORRECT answer.
Links Archive December 1st 2014 March 2015 Navigation Previous Page Next Page