Freeze-Dried Acerola Cherry (Malpighia emarginata — Whole-Food Vitamin C)

Covers your vitamin C

Acerola (Barbados cherry) is a small, sour Caribbean and Brazilian fruit whose vitamin C content is among the highest of any food: about 1,000–4,500 mg per 100 g of fresh fruit, depending on ripeness, since unripe green fruit has the most. Orange has about 50 mg/100 g. Freeze-drying removes ~90% of the weight as water, so pure freeze-dried acerola powder is roughly 10–25% vitamin C by weight — 100–250 mg per gram. A quarter teaspoon already covers the adult RDA (75–90 mg), several times over. Acerola also contains anthocyanins, quercetin and other flavonols, and carotenoids. (Strong — food composition; vitamin C biology is covered on the Vitamin C page)

Compared with orange juice: a glass of OJ gives ~100 mg vitamin C with ~20 g of sugar, while a gram of acerola gives about the same vitamin C with essentially no sugar. That makes acerola a clean choice when vitamin C is the goal. OJ still brings things acerola doesn't (hesperidin, potassium, folate), which is why it's on this list for different reasons.

May be retained better than a pill

In healthy young Japanese men, diluted acerola juice with 50 mg vitamin C gave a plasma area-under-curve that tended to be higher than 50 mg of plain ascorbic acid, and significantly less vitamin C was excreted in the urine at 1, 2 and 5 hours.¹ The authors credit something else in the fruit, probably the flavonoids, with slowing clearance. (Early — one small pharmacokinetic study)

Two caveats. First, the study came from Nichirei Foods' R&D division, the largest acerola processor in Japan. Second, a review of the whole literature by Carr and Vissers found that while animal studies often show food-derived vitamin C doing better, every human steady-state study found no difference between synthetic and food-derived vitamin C.² The honest summary is that acerola is at least as good as a pill, and possibly slightly better retained in the short term. The case for it rests on the sugar-free whole-food package, not on superior absorption.

Slows sugar absorption

A crude acerola polyphenol fraction inhibited α-glucosidase (especially maltase) and glucose uptake into Caco-2 intestinal cells, and blunted blood-glucose spikes after glucose or maltose in mice. The effect appears to involve both slower starch/sugar digestion and reduced intestinal glucose transport.³ (Animal–in-vitro; also a Nichirei study) No human glucose trial exists, and the doses used in mice would need several grams of powder per meal.

How to take it

• Dose: ¼–½ teaspoon (~1–2 g) a day gives roughly 100–500 mg vitamin C, depending on the product. Plasma vitamin C is close to saturated at ~200–400 mg/day in divided doses, and absorption efficiency drops above ~1 g at once.
• Product: look for 100% freeze-dried acerola fruit or juice powder, with vitamin C stated per serving. Many "acerola vitamin C" products are acerola extract bulked with maltodextrin or spiked with synthetic ascorbic acid.
• Storage: vitamin C oxidizes quickly once exposed to moisture, heat, light and air. Keep the bag sealed and dry, and mix into cold drinks, smoothies, yogurt or water. The powder is sour, like a cherry lemonade.
• With iron-rich plant meals: vitamin C is the best-established enhancer of non-heme iron absorption. It's useful alongside plant iron, and it helps offset the iron-blocking effect of tea if the two meet.
• Around training: as with NAC, very high antioxidant doses right around workouts may blunt training adaptations. Food-level vitamin C isn't a concern here.

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