Wild Blush – Organic Apple, Raspberry & Rosehip Juice 330 ml

Apple, Raspberry and Rosehip in Scientific Research

Apple, raspberry and rosehip are all members of the Rosaceae, and all three have been studied often enough that the gaps in the record are as informative as the findings. What follows is what the peer-reviewed literature says about the plants themselves — their composition, what happens to them when they are pressed, and what human trials have and have not found. The study design is named each time, because with these three fruits the form in which they were eaten usually decides the result.

1. Three fruits of one family, three different vitamin C stories

Rosehip is the one that carries the vitamin, and its published figures differ fourfold for a reason worth knowing. A Lithuanian group growing Rosa rugosa and Rosa canina side by side on one organic farm measured 736.27 mg of ascorbic acid per 100 g in fresh R. rugosa flesh against 385.82 mg in R. canina [1]. The 3,036.08 mg per 100 g that circulates in the trade comes from the same group, but from freeze-dried flesh at an early, still-unripe stage — a dry-matter figure, not a fresh one [2]. Raspberry sits an order of magnitude lower: three cultivars grown in Lublin measured 22.8, 25.1 and 27.0 mg per 100 g of fresh fruit, and a second set of cultivars from the same group ran 28.2 to 33.6 mg [3,4]. For apple the honest answer is that the number is not usable: the one published range, 14.97 to 31.48 mg per 100 g, does not state whether it is fresh weight or dry matter [5]. Vitamin C is one of the few nutrients with authorised wording behind it in the EU: it contributes to the normal function of the immune system, to normal collagen formation, and to the reduction of tiredness and fatigue.

2. The ripening paradox, which has no good answer

German measurements across ripening stages found that vitamin C in Rosa rugosa hips peaks while the fruit is still orange, at around 1,090 mg per 100 g of fresh weight, and is lower once the hip has turned fully red — while total phenolics go on rising to full ripeness, staying above 1,000 mg gallic acid equivalents per 100 g at every stage, and carotenoids accumulate in the same direction as the phenolics [6]. There is no picking date that optimises both. Rosa rugosa is also unusual in carrying lycopene alongside lutein and zeaxanthin, a combination not common in a single fruit, and in the side-by-side comparison its beta-carotene and lycopene ran about three times higher than R. canina grown in the same place, while R. canina was slightly higher in lutein and zeaxanthin [1].

3. Where apple's polyphenols sit, and the arithmetic usually left out

Total polyphenols across 104 European cultivars averaged 150 mg catechin equivalents per 100 g of fresh fruit, with a range from 52 to 378 — a sevenfold spread within one species [5]. Peel carries two to three times the concentration of flesh, 182 to 328 mg catechin equivalents per 100 g against 54 to 174 in Polish cultivars [5], and an independent measurement of 18 old Banat cultivars found peel averaging about 1.9 times the flesh, with two cultivars running the other way [7]. The part that usually gets dropped: peel is only about 10 per cent of the fruit by weight [5]. Three times the concentration in a tenth of the mass means most of a whole apple's polyphenol load still comes from the flesh.

4. Raspberry's signature chemistry, and how large the molecules are

Raspberry's defining compounds are ellagitannins, and the two that matter are sanguiin H-6 and lambertianin C — large molecules, lambertianin C at around 2,800 daltons, roughly six times the mass of a simple anthocyanin. An ellagitannin preparation made from 'Polka' press cake was 86% tannin by weight, with lambertianin C at 44,156 ± 1,705 and sanguiin H-6 at 35,917 ± 1,300 mg per 100 g of the preparation, and free ellagic acid not detected at all [8] — figures for a purified preparation, not for fruit. In freeze-dried whole fruit the ratio runs the other way, sanguiin H-6 around 450 and lambertianin C around 60 mg per 100 g of dry powder, with free ellagic acid again undetected [9]. Cultivar and ripeness move both: across 14 ripe cultivars the ellagitannin content varied about threefold, and tannins fall sharply as the fruit ripens [10].

5. The pigments: one anthocyanin does most of the work

Raspberry colour is almost entirely cyanidin-based, and one compound dominates. Cyanidin-3-O-sophoroside accounted for about 71% of the anthocyanins measured in the fresh pulp of 'Polana', at 332.0 ± 16 µg per gram of fresh fruit, with cyanidin-3-O-glucosylrutinoside, cyanidin-3-O-glucoside and cyanidin-3-O-rutinoside following well behind [11]. In freeze-dried fruit the same ordering appears at about 77% and 18% for the sophoroside and the glucoside, and neither aglycones nor pelargonidin-based anthocyanins were detected [9]. Total anthocyanins in red-fruited cultivars measured 16.4 to 40.2 mg cyanidin-3-glucoside equivalents per 100 g of fresh fruit, against 0.3 to 1.1 mg in yellow-fruited lines in the same study [12].

6. What pressing and clarifying do — measured, not assumed

This is where the three fruits tell one story. In a full mass balance of raspberry processing to juice, 68.1% of the ellagitannins were retained in the press cake — and mostly in its seedless fraction, meaning in the pulp and skin residue rather than in the seeds — along with 87.7% of the flavanols [13]. Transfer into the juice fell steeply with molecular mass: raising ellagitannin mass from 1,568 to 2,805 daltons caused a more than tenfold decrease in how much crossed over [13]. What does carry through is the pigment: anthocyanins contributed 65.1% of the total polyphenolics in the finished juice [13]. Filtration then removes most of what is left — a 5 µm sheet retained 100% of the lambertianin C and 82% of the sanguiin H-6, while enzymatic clarification and pasteurisation at 65 °C or 85 °C for 20 or 60 seconds had no significant effect on either ellagitannins or anthocyanins [14]. Apple shows the same divide in a different measure: across commercial juices, total phenolic acids ran 33.07 to 49.69 mg per 100 ml in cloudy juices against 9.79 to 16.00 in clear ones, and chlorogenic acid — apple's principal phenolic acid — 30.28 to 48.32 against 6.71 to 12.68 mg per 100 ml [15]. For rosehip the measurement that exists is of the juice itself: a pressed 100% Rosa rugosa juice held 253.60 mg of vitamin C per 100 ml, 78.2% of it as L-ascorbic acid and 21.8% as dehydroascorbic acid, with 272.93 mg gallic acid equivalents of total polyphenols per 100 ml and a pH of 3.45 [16]. No carotenoid measurement in pressed rosehip juice has been published in any units; carotenoids are fat-soluble, and how much of them crosses into juice is simply not known.

7. What happens to it in the bottle

Rosehip supplies the clearest answer anyone has to the shelf-life question, and it is not a comfortable one. In a Chilean study of Rosa rubiginosa juice, ascorbic acid disappeared by the sixth week of storage in all three groups — pasteurised and chilled included. Pasteurisation itself cost almost nothing; storage cost everything [17]. A day-zero vitamin C figure therefore says very little on its own, which makes composition for this fruit a question about time as much as about variety.

8. Almost none of it is absorbed as itself

When healthy volunteers ate 300 g of raspberries, no native raspberry polyphenols or their metabolites could be detected in plasma at all, and the three main anthocyanins appeared in urine at less than 0.1% of the amount eaten [18]. In volunteers with an ileostomy, about 40% of the anthocyanins and about 23% of the sanguiin H-6 were recovered in ileal fluid, while ellagic acid recovery reached 241% of intake — more came out than went in, because the ellagitannins are hydrolysed to ellagic acid on the way through [18]. What reaches the blood is what the gut microbiota makes of them: only volunteers who still had a colon excreted urolithins, and only from 7 to 48 hours after eating, with profiles that varied markedly from one person to another [18]. A four-week raspberry intervention made that explicit — of 25 participants, 10 were urolithin metabotype A, 10 metabotype B and 5 produced no urolithins at all, and more than 99% of the (poly)phenol metabolites measured in plasma and urine were microbial products rather than compounds from the fruit [19]; in a cohort of 839 people aged 5 to 90, ageing was the main determinant of which metabotype a person carries [20]. Apple's matrix pulls in the same direction: at a matched 70 mg of epicatechin, peak plasma concentration, 24-hour area under the curve and urinary excretion were all higher from an apple flavanol extract beverage than from whole apple purée, and time to peak was later from the purée [21].

What has been measured in people

Apple is the most studied of the three and the least conclusive. Forty adults with total cholesterol above 5.2 mmol/l ate about 340 g of whole apples a day for eight weeks against a sugar- and energy-matched apple beverage: total cholesterol fell from 6.08 to 5.89 mmol/l on the fruit and rose from 6.05 to 6.11 on the control, a between-arm difference of −0.22 mmol/l (P = 0.006), with LDL differing by −0.14 mmol/l (P = 0.031) [22]. In a five-arm, four-week crossover in 23 volunteers, whole apple trended LDL down 6.7% and apple pomace 7.9%, cloudy juice trended down 2.2%, and clear juice raised LDL by 6.9% relative to the whole-apple and pomace arms — the same apples, served four ways [23]. Pooled, the effect disappears: a meta-analysis of 17 trials in 793 participants put total cholesterol at −2.69 mg/dl (95% CI −5.43 to 0.04) and LDL at −2.80 mg/dl (95% CI −5.78 to 0.17), neither significant, while HDL fell slightly [24]; a 2026 systematic review of 38 human intervention studies found only three medium- or long-term studies showing any lipid effect at all [25]. Raspberry's clearest human finding is an acute one: in 32 adults, 125 g and 250 g of frozen raspberries eaten with a high-carbohydrate, moderate-fat breakfast both reduced the two-hour insulin response in the prediabetic group, and 250 g also lowered peak insulin, peak glucose and the two-hour glucose response, while oxidative stress and inflammatory markers did not move [26]. Longer intake is a different story: 280 g a day for eight weeks in 59 adults at risk of metabolic syndrome produced no significant between-group difference in any anthropometric or metabolic variable, at 92.8% compliance [27]. Form matters here too — 58 adults given 266 g, 125 kcal preloads matched for weight, energy, energy density and eating rate ate 15% less at the following meal after whole apple than after no preload, and less than after apple sauce or either juice [28].

What has not been established

There is no authorised European health claim for apple, for apple polyphenols, for raspberry, for ellagitannins or urolithins, or for rosehip. Vitamin C is the only authorised route, and it belongs to the vitamin rather than to any of the three plants. Rosehip's reputation rests on joint trials that did not test fruit or juice: the pivotal meta-analysis pooled trials of 5 g a day of dried hip powder with the seeds, given in capsules over months [29], and there is no clinical study of rosehip juice at all. For apple, blood pressure has been measured repeatedly and moved in essentially none of the trials — pooled systolic −0.44 mmHg (95% CI −2.22 to 1.33), diastolic −0.34 mmHg (95% CI −1.52 to 0.84) — and C-reactive protein pooled at a standardised mean difference of −0.03 (95% CI −0.34 to 0.28) [24]. The 2026 review concludes plainly that the evidence base is not sufficient for definitive conclusions, and that the glucose and vascular signals appear mainly in short-term studies [25].

Safety, and who should be careful

All three have been well tolerated at high intakes in the trials above — 340 g of apple a day for eight weeks [22], 550 g a day for four weeks [23], and 280 g of raspberries a day for eight weeks at 92.8% compliance [27] — and no upper intake has been established for any of them. Adverse events in the pooled rosehip powder trials were mild and did not differ from placebo, mostly gastrointestinal discomfort and reflux in both arms [29]. Two specifics are worth knowing. The two-apple trial recorded a rise in serum uric acid (P = 0.020) [22]; apple's sugar profile is fructose-dominant and fructose raises urate, which matters to anyone managing gout. And all three are markedly acidic as juices — commercial apple juices measured pH 3.38 to 3.47 [15] and pressed rosehip juice pH 3.45 [16] — so the usual advice for acidic drinks applies. Apple, raspberry and rosehip all belong to the Rosaceae; none of the three is a mandatory declarable allergen in the European Union.

References

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