Reviewed by Jessie, BSc Biomedical Science · Formulation Lead, Purest Kids
TL;DR — Vitamin E (d-alpha-tocopherol) in Purest Kids Omega-3 serves two roles: it acts as a sacrificial antioxidant protecting DHA and EPA from oxidation during storage, and it contributes a small dose of this fat-soluble vitamin. Its inclusion is a formulation quality signal — well-made omega-3 products include antioxidant protection by default.
An ingredient parents notice
Informed parents reading the ingredient list on Purest Kids Omega-3 will notice Vitamin E (d-alpha-tocopherol) listed alongside the omega-3. The natural question: why is it there, and what does it do?
There are two answers, and both are relevant.
Vitamin E as antioxidant protection for the oil
Omega-3 fatty acids are polyunsaturated — a chemical structure that makes them biologically valuable and simultaneously prone to oxidation. Vitamin E is a fat-soluble antioxidant that, when included in the formulation, helps protect the omega-3 oil from oxidative degradation during storage. It acts as a sacrificial antioxidant: it oxidises preferentially, sparing the DHA and EPA.
This is not decorative. Supplements that do not include antioxidant protection are more vulnerable to oxidation over time, which degrades the quality of the omega-3 oil. Including Vitamin E in the formulation is standard practice in well-formulated omega-3 supplements — its presence is a quality indicator, not an afterthought.
Vitamin E as a nutrient in its own right
At 11mg per serve (73% of the daily value for children), the Vitamin E in Purest Kids Omega-3 also contributes meaningfully to a child's daily Vitamin E intake. Vitamin E is a fat-soluble antioxidant that plays roles in immune function, skin health, and protection of cell membranes from oxidative damage.
Vitamin E deficiency is uncommon in Singapore, but many children do not consume optimal amounts through diet alone. The form used — d-alpha-tocopherol — is the natural form, which has approximately twice the bioavailability of the synthetic dl-alpha-tocopherol form used in some supplements.
Why the form matters
D-alpha-tocopherol (natural form) vs dl-alpha-tocopherol (synthetic form) is a distinction worth knowing. Both are Vitamin E, but the body preferentially retains the natural form. If your child's supplement lists Vitamin E, check whether it is d- or dl- — the prefix matters more than most labels make clear.
Omega-3 Mango Burstlets — 450mg DHA + 11mg natural Vitamin E per serve →
References
- Traber MG, Atkinson J. "Vitamin E, antioxidant and nothing more." Free Radical Biology and Medicine, 2007.
- Burton GW, Traber MG. "Vitamin E: antioxidant activity, biokinetics, and bioavailability." Annual Review of Nutrition, 1990.
- Kiyose C, et al. "Biodiscrimination of alpha-tocopherol stereoisomers in humans after oral administration." American Journal of Clinical Nutrition, 1997.