ingredients
Kakadu Plum Skin Benefits: Australia's Vitamin C Fruit
Kakadu Plum holds the highest natural vitamin C of any fruit. What that means for skin, how it compares to synthetic vitamin C, and how to use it.
By Neven Laham
15 August 2026
6 min read
Kakadu Plum (Terminalia ferdinandiana) carries the highest known concentration of natural vitamin C of any fruit — commonly reported in the range of 2,300–3,150mg per 100g of fresh fruit, against roughly 53mg for an orange.1 Published figures vary widely with provenance, season and processing, so treat any single number with caution.2 In skincare, that vitamin C load is associated with a brighter, more even-looking complexion and antioxidant protection against environmental stress.
The more useful thing to understand is not the number. It is that whole-fruit vitamin C behaves differently on skin than the isolated synthetic kind — and for a lot of people, more comfortably.
What Kakadu Plum is
A small, pale yellow-green fruit, roughly the size of an olive, growing on a slender tree across the woodlands of the Northern Territory and northern Western Australia. Also called billygoat plum or gubinge, depending on Country.
It has been food and medicine for Aboriginal peoples of northern Australia for many thousands of years. Much of the commercial harvest is still done by Indigenous communities, which makes the question of who benefits from that harvest a live one — and worth asking any brand that uses it.
The taste is tart and slightly floral, closer to sour apple with a citrus edge than to a stone-fruit plum.
What it does on skin
Brightening and evenness
Vitamin C influences melanin production, which is why it appears in nearly every product marketed for dullness or uneven tone. Used consistently, it is associated with a complexion that looks clearer and more uniform.
This takes weeks, not days. Any product promising visible tone change in a fortnight is selling something other than vitamin C.
Antioxidant defence
Vitamin C neutralises free radicals generated by UV exposure and pollution before they degrade collagen and elastin. In Australia — the highest ambient UV of any populated continent — this is not a theoretical concern.
Kakadu Plum also contains gallic acid and ellagic acid, phenolic compounds with antioxidant activity of their own. The fruit is doing more than one thing.
Supporting the look of firmness
Vitamin C is a required cofactor in collagen synthesis. Skincare containing it is associated with the appearance of firmer, more cushioned skin over time — a cosmetic effect, achieved gradually.
Comfort
Gallic acid is associated with soothing properties, which is part of why whole-fruit Kakadu extracts are often better tolerated than high-percentage synthetic vitamin C serums. Those can sting on reactive skin. This tends not to.
Whole fruit vs synthetic vitamin C
The most common form of synthetic vitamin C in skincare is L-ascorbic acid. It is the most studied and, at the right concentration and pH, the most potent. It is also notoriously unstable — it oxidises on exposure to light, air and warmth, which is why a serum that arrives clear and turns amber has already lost much of its value.
Whole-fruit Kakadu extract behaves differently. The vitamin C arrives with the fruit's own supporting phenolics, which appear to buffer it. The trade-off is real and worth stating plainly:
| L-ascorbic acid | Kakadu Plum extract | |
|---|---|---|
| Form | Isolated single active | Whole fruit, with supporting phenolics |
| Stability | Poor — oxidises on light and air | Markedly better |
| Tolerance | Can sting or flush | Generally gentle |
| Formulation | Narrow pH window | Works across a wider range |
| Best suited to | A targeted facial serum | Body care, bath formulations, reactive skin |
They are built for different jobs. A high-percentage L-ascorbic serum is a targeted facial treatment with a short, fussy life. Whole-fruit Kakadu is stable, forgiving to formulate with and comfortable on reactive skin, which is what makes it workable across body care and bath formulations where a low-pH serum simply would not belong.
Where it sits in the Bush & Salt range
Kakadu Plum appears where its antioxidant profile is doing genuine work rather than decorating a label.
- Harmony Bath Soak — with Australian Pink Clay and coconut milk, formulated for evening restoration
- Energising Body Scrub — with Lemon Myrtle and Australian Yellow Clay, for a morning polish
- Aurora Luxe collection — paired with Yellow Clay and Lemon Myrtle for a morning ritual
- Harmony collection — the fuller evening sequence
How to use it well
Consistency beats concentration. Vitamin C works cumulatively. Twice a week for three months achieves more than an intensive fortnight followed by nothing.
Store it away from light and heat. Vitamin C degrades in both. A bathroom windowsill above a hot shower is the worst storage location in the house.
Pair it with sun protection. Antioxidants reduce the damage UV causes; they do not stop UV reaching skin. In Australia, vitamin C without sunscreen is half a strategy.
Introduce it alone. If you are adding several products at once and something reacts, you will not know which one. Patch test on the inner forearm and wait 24 hours.
Part of our guide to Australian native skincare ingredients. We acknowledge the Traditional Custodians of the Country on which Kakadu Plum grows and the knowledge systems that have long understood its value.
Frequently asked questions
Commonly reported between roughly 2,300 and 3,150mg per 100g of fresh fruit, though published values vary substantially with growing region, harvest timing and processing.12 Dry-weight figures are higher again, which is where some of the larger numbers in circulation come from. An orange contains roughly 53mg per 100g, so on a fresh-weight basis Kakadu Plum carries something in the order of 40–60 times the vitamin C of an orange — meaning the widely repeated "100 times" figure sits at or beyond the top of the published range.
Generally better tolerated than high-percentage synthetic vitamin C, because the whole-fruit extract delivers it alongside buffering phenolics. That said, sensitivity is individual. Patch test on the inner forearm for 24 hours before wider use.
Usually, though combining several actives at once raises the chance of irritation. Introduce one at a time. If you use a prescription retinoid, or you are managing a diagnosed skin condition, ask your dermatologist first.
Much of the supply is wild-harvested by Indigenous communities in northern Australia, and demand has grown quickly. Whether that growth benefits those communities depends entirely on the supply arrangement — so ask brands for specifics rather than accepting general sustainability language.
They are not really substitutes. A low-pH L-ascorbic serum is a targeted facial treatment; Kakadu Plum delivers vitamin C alongside the fruit's own supporting phenolics, which makes it more stable, better tolerated and usable across body and bath formulations where a serum would not be appropriate.
Very little on its own — a faint tartness at most. Any pronounced aroma in a Kakadu Plum product is coming from the other botanicals in the formula.
Sources
Every factual claim above is referenced below. Where the evidence is limited, the article says so rather than overstating it.
- 1.Konczak I, Zabaras D, Dunstan M, Aguas P. "Antioxidant capacity and hydrophilic phytochemicals in commercially grown native Australian fruits." Food Chemistry 2010;123(4):1048–1054.
- 2.Richmond R, Bowyer M, Vuong Q, et al. "Nutritional and functional properties of Terminalia ferdinandiana fruits wild harvested from Western Australia." Foods 2024;13(18):2888.
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