Mandarins: almost everything tested was a drink, not the fruit

Mandarins carry beta-cryptoxanthin, an orange pigment the body can turn into vitamin A, and they deliver it unusually well. In 135 lactating women in Bangladesh, plasma beta-cryptoxanthin rose 830 percent on tangerines against a 250 percent rise in beta-carotene on orange-fleshed sweet potato, an apparent fourfold advantage in absorption. Then the trial reached its real finding. Vitamin A in breast milk rose only in the group given a capsule. Neither food raised it. Better absorption into the blood did not become more vitamin A where it was needed. That pattern runs through this whole page. Know it before you read anything else about this fruit. One study used a concentrated beverage supplying 4.7 mg a day, one an emulsified formulation, one a yogurt made with mandarin. One more gave a transplant patient a kilogram of clementines a day. The number of trials that fed people ordinary mandarins and measured something that matters is zero.

The numbers, per 100 g

What a real portion looks like

• In a Japanese farming town, people eating three or four mandarins a day had stiffer arteries less often than those eating fewer than one. — 635 participants of the Mikkabi cohort in Japan who had pulse wave velocity below the cut-off at baseline, followed for 57,921 person-months, of whom 99 developed a high value (n = 635) Evidence C source
  The hazard ratio for high pulse wave velocity in the highest tertile against the lowest was significantly lower for beta-cryptoxanthin, beta-carotene and total carotenoids; serum concentrations were higher in frequent Satsuma mandarin eaters, and 3-4 mandarins a day against fewer than one was associated with lower risk

What your body absorbs

• The carotenoid in tangerines was absorbed four times better than the one in sweet potato, and neither raised the vitamin A in breast milk. — 135 lactating Bangladeshi women with low vitamin A status, given orange-fleshed sweet potato (12 mg beta-carotene a day), tangerines (5.3 mg beta-cryptoxanthin a day), white sweet potato with a 0.5 mg vitamin A supplement, or white sweet potato alone (n = 135) Evidence B source
  Plasma beta-carotene rose 250% in the sweet potato group and beta-cryptoxanthin rose 830% in the tangerine group, an apparent relative absorption four times higher for the tangerine carotenoid; breast milk vitamin A rose only in the supplement group, and milk beta-cryptoxanthin rose in the tangerine group
• After a citrus meal one carotenoid climbed within five hours and stayed up all day, while two others in the same fruit did not move at all. — 8 healthy non-smoking adults in the first study eating 234-304 g of canned tangerines or 60-540 g of pink grapefruit, and 11 in the second comparing 234 g of tangerines with 540 g of pink grapefruit (n = 19 across two studies) Evidence B source
  Plasma beta-cryptoxanthin rose within 5 hours and stayed high through 24 hours, while plasma lycopene and beta-carotene did not change after a comparable citrus meal in the same food matrix

What cooking and storage change

• An emulsified preparation got more of the compound into the blood than fresh mandarin juice did. — adults in the human arm; the abstract does not give the number (n = not stated in the abstract) Evidence D source
  Serum transfer efficiency was statistically higher from the emulsified formulation than from fresh juice, and the cell work indicated emulsifiers preferentially speed absorption of the non-esterified form

What it does to your health

• A concentrated mandarin drink quadrupled the compound in the blood and shifted two fat-tissue hormones, without changing weight. — 17 moderately obese postmenopausal Japanese women (n = 17) Evidence D source
  Serum beta-cryptoxanthin rose four-fold; high molecular weight adiponectin rose and plasminogen activator inhibitor 1 fell; body weight and BMI did not change
• A yogurt made with mandarin reduced redness and itching in an allergy challenge compared with plain yogurt. — 26 asymptomatic patients with proven seasonal allergic conjunctivitis to cedar pollen in experiment 1, and 31 patients in experiment 2 (n = 57 across both experiments) Evidence B source
  In the blinded experiment redness scored 1.03 against 1.28 (p=0.0156), itching 1.93 against 2.82 (p=0.0133) and conjunctival surface temperature rose 0.54C against 0.31C (p<0.001) in the mandarin group compared with control yogurt

Safety, limits and interactions

• Clementines moved a drug-clearing enzyme in two people, and the authors conclude that an interaction cannot be assured and that prescribers should be cautious until there are more data. — two single case experiments, not a trial: one renal transplant patient taking tacrolimus who ate 1 kg of clementines a day for 4 days, and one healthy male volunteer drinking clementine juice chronically (n = 2) Evidence D source
  Estimated midazolam clearance rose 43% in the patient and 89% in the volunteer, changes the authors place within the range of intra-individual variability; the juice used contained only hesperidin and narirutin, unlike the multi-flavonoid juice of the in vitro assay

The bottom line

The carotenoid itself behaves consistently and quickly. After a citrus meal, plasma beta-cryptoxanthin climbed within five hours and stayed up for a full day, while lycopene and beta-carotene in the same fruit did not move at all. Eight and eleven people, canned fruit, one meal. A rise in plasma measures absorption and says nothing about benefit. How the fruit is presented changes that rise too: an emulsified preparation got more of the compound into the blood than fresh Satsuma juice did, in a study whose abstract does not say how many people took part. Seventeen moderately obese postmenopausal women drank a mandarin concentrate for three weeks. Serum beta-cryptoxanthin quadrupled, one fat-tissue hormone rose and another fell, and body weight and BMI did not change. Everybody in that study got the drink, so there is no control group and anything seasonal is inside the result. The dose was several times what you would get from eating mandarins. The allergy result is the one most likely to be repeated at you, so here is its shape. Thirty-one patients with proven cedar pollen conjunctivitis ate mandarin orange yogurt or plain yogurt for two weeks and then had allergen dripped into the eye. Redness scored 1.03 against 1.28 and itching 1.93 against 2.82. The differences are small on scales with wide spreads, the eye surface temperature moved in the direction the redness result would not predict, and the yogurt contained nobiletin and beta-lactoglobulin. It was a test of that yogurt under an artificial challenge, and not of eating a mandarin in pollen season. Two things for people on medication. A renal transplant patient ate a kilogram of clementines a day for four days and a healthy volunteer drank clementine juice, and a drug-clearing enzyme shifted by 43 and 89 percent. The authors place those shifts inside ordinary day-to-day variation and still conclude that an interaction cannot be assured and that prescribers should stay cautious until there are more data. Two people cannot establish or rule out anything. This is not grapefruit, and the grapefruit warning should not be copied across without evidence, so if you take a medicine that names grapefruit on its label, ask the pharmacist about clementines rather than guessing in either direction. The one finding on ordinary fruit comes from a Japanese farming town. Among 635 people in the Mikkabi cohort, eating three or four Satsuma mandarins a day went with a lower risk of stiff arteries than eating fewer than one, across 99 events. In a mandarin-growing region, eating three or four a day marks out a whole way of living, and arterial stiffness is a measurement rather than a heart attack. The authors call it a candidate for interventional study, which is the correct amount of enthusiasm.

Sources

1. man-dr-07 · prospective cohort study
   Compared with <1/d intake of Satsuma mandarin, 3-4/d was associated with a low risk of high PWV.
   Nutr Metab Cardiovasc Dis, 2016 · checked 2026-09-22
2. man-dr-01 · randomised controlled trial
   The greater change in CX concentrations in the tangerine group than in BC concentrations in the OFSP group suggests that CX in tangerines was better absorbed, but both foods failed to increase milk VA concentrations.
   Am J Clin Nutr, 2013 · checked 2026-09-22
3. man-dr-02 · randomised crossover feeding studies
   Plasma β-cryptoxanthin concentrations increased within 5hours and then stabilized, remaining high throughout the 24hours measured. Plasma concentrations of lycopene and β-carotene did not change.
   Nutr Res, 2016 · checked 2026-09-22
4. man-dr-03 · human trial with cell permeability studies
   Human trials showed that its serum transfer efficiency was statistically higher in the emulsified formulation than in fresh Satsuma mandarin juice.
   Biosci Biotechnol Biochem, 2012 · checked 2026-09-22
5. man-dr-05 · before-and-after controlled trial
   The results indicated no significant changes in body weight or body mass index (BMI). Serum β-cryptoxanthin levels increased significantly by 4-fold.
   Lipids Health Dis, 2012 · checked 2026-09-22
6. man-dr-06 · randomised double-blind placebo-controlled trial
   In experiment 2, the scores of redness (1.03 ± 0.18 vs. 1.28 ± 0.52; P = 0.0156), itching (1.93 ± 1.92 vs. 2.82 ± 2.21; P = 0.0133), and surface temperature (0.54 ± 0.21°C vs. 0.31 ± 0.25°C; P < 0.001) were significantly lower in the mandarin orange yogurt group than in the control yogurt group.
   Invest Ophthalmol Vis Sci, 2017 · checked 2026-09-22
7. man-dr-04 · two single case experiments
   Therefore one cannot assure a potential drug interaction due to the clementines, but prescribers should be cautious unless further data emerges.
   Eur J Pharm Sci, 2019 · checked 2026-09-22