Camu powder is a dried, ground form of the camu camu berry, a small Amazonian fruit packed with one of the highest natural concentrations of vitamin C found in any plant. The powder is made by dehydrating the pulp of the berry at low temperatures, then milling it into a fine, tart powder that can be added to foods and drinks. It has gained popularity as a whole-food vitamin C supplement and antioxidant booster.
Where Camu Camu Comes From
Camu camu (Myrciaria dubia) is a shrub-like tree native to the Amazon Basin, where it grows along the banks of rocky rivers and lakes in Peru, Brazil, Venezuela, Bolivia, and Colombia. It belongs to the same plant family as guava and eucalyptus. The plant has adapted to a unique flooding cycle: it flowers during periods of higher sun exposure and lower water levels, then fruits during the wet season when its trunks are submerged in several feet of water.
Harvesting is still done largely by hand. Workers guide canoes through the partially submerged branches and pick the berries directly. The fresh fruit is extremely perishable and intensely sour, which is why almost all camu camu sold outside South America comes in powdered form rather than fresh.
Nutritional Profile
Vitamin C is the headline nutrient. Camu camu consistently outperforms other tropical fruits in vitamin C content and total phenolic compounds. A typical teaspoon (about 3 to 5 grams) of camu powder delivers roughly 300 to 500 mg of vitamin C, though this varies by brand and processing method. For comparison, one whole orange provides about 70 mg.
But vitamin C is only part of the picture. Camu camu contains a broad range of plant compounds that contribute to its deep reddish-purple color and sharp flavor. These include anthocyanins (the same pigments found in blueberries and red cabbage), flavonols like quercetin and myricetin, ellagic acid, catechin, and carotenoids such as lutein and beta-carotene. The phenolic content can vary significantly depending on where the fruit was grown, with soil conditions directly influencing the concentration of these compounds.
Potential Health Benefits
Camu camu ranks at the top among tropical fruits for antioxidant activity, meaning its compounds are especially effective at neutralizing unstable molecules that contribute to cell damage. This capacity comes not just from vitamin C but from the combined effect of its flavonoids and anthocyanins working together.
In animal research, camu camu extract has shown promise for metabolic health. A study published in the journal Gut found that treatment with camu camu prevented obesity in mice fed a high-fat diet by altering gut bacteria composition and increasing energy expenditure. These findings are preliminary and haven’t been replicated in human trials, but they point to the fruit’s potential beyond simple vitamin C supplementation.
The anti-inflammatory potential is also notable. The combination of ellagic acid, quercetin, and anthocyanins in camu camu has been linked to reduced markers of inflammation and oxidative stress in laboratory settings. Whether these effects translate meaningfully to humans at typical supplement doses remains an open question, but the phytochemical profile is genuinely rich compared to synthetic vitamin C supplements.
What It Tastes Like
Camu powder is intensely tart and acidic, with a flavor often compared to a cross between lemon, cherry, lime, and grapefruit. It has a slight underlying sweetness, but the sourness dominates. The color ranges from pale pink to reddish-purple depending on how much skin was included in processing.
This tartness makes it a natural fit for smoothies, where sweeter fruits like banana or mango balance it out. It also works well stirred into juices, mixed into yogurt, or blended into sorbets and ice creams. Some people use it in savory applications like salad dressings or marinades, where the acidity plays a role similar to citrus juice. Starting with half a teaspoon and adjusting up is a practical approach if you’re new to the flavor.
How to Store It
Vitamin C is notoriously fragile. It breaks down when exposed to heat, light, oxygen, and humidity, and camu powder is no exception. Studies on vitamin C degradation show that prolonged storage at higher temperatures accelerates oxidative breakdown, and packaging without adequate barriers against light and oxygen fails to preserve the compound over time. In one study tracking vitamin C loss over just 21 days, 74 to 79 percent of the vitamin degraded.
To get the most from your camu powder, store it in an airtight, opaque container in a cool, dark place. Some people refrigerate it. Avoid leaving it on a sunny countertop or near the stove. Once opened, try to use it within a few months. If the powder has turned noticeably brown, that’s a sign of oxidation and reduced potency.
Safety and Who Should Be Cautious
For most people, camu powder at typical serving sizes (one teaspoon or less daily) is well tolerated. The main risk comes from its high vitamin C content. Consuming very large amounts of vitamin C from any source can cause digestive discomfort, including nausea, cramping, and diarrhea. The tolerable upper intake for vitamin C in adults is 2,000 mg per day, and it would take several heaping tablespoons of camu powder to approach that level, but stacking it with other vitamin C supplements could push you closer.
People prone to kidney stones should be mindful, since excess vitamin C can increase oxalate levels in the urine. And Memorial Sloan Kettering Cancer Center specifically warns against using camu camu during chemotherapy. The high vitamin C content may interfere with certain chemotherapy drugs that work by generating free radicals, and antioxidants can theoretically blunt that mechanism.
There is no established standardized dose for camu powder as a supplement. Most products suggest half a teaspoon to one teaspoon per day, which generally delivers a moderate and safe amount of vitamin C along with the fruit’s broader spectrum of plant compounds.