Constituents

- Bark contains much tannin and a crystalline principle, ziziphic acid.

- Tannin in the bark is called ziziphotannic acid.

- Fruit contains mucilage, fruit acids and sugar.

- Bark contains 4.1 % tannin; the root 2.6 to 9.3% tannin.

- Studies have yielded various chemical substances like Mauritine-A; Amphibine-H; Jubanine-A; Jubanine-B; Mucronine-D and Nummularine-B. Sativanine-E. Frangufoline, Ziziphine-A to Q, betulinic acid colubrinic acid, alphitolic acid, 3-O-cis-p-coumaroylalphitolic acid, 3-O-transp­coumaroylalphitolic acid, 3-O-cis-p-coumaroylmaslinic acid, 3-O-trans-pcoumaroylmaslinic acid, oleanolic acid, betulonic acid, oleanonic acid, zizyberenalic acid and betulinic acid, jujubosides A, B, A1 B1 and C and acetyljujuboside B and the protojujubosides A, B and B1, saponin, ziziphin, from the dried leaves of Z. jujube - 3-O-a-L-rhamnopyranosyl (1-2)-a­arabinopyranosyl-20-O- (2,3)-di-O-acetyl-a-L-rhamnopyranosyl jujubogenin.

- Study evaluating leaves and bark of ZJ for catechins and proanthocyanidin isolated 16 compounds, including 8 monmeric catechins—

(−)-epiafzelechin, (−)-epicatechin, (−)-epigallocatechin, (−)-epicatechin gallate, (−)-epigal-locatechin gallate, (+)-catechin, (+)-catechin gallate, and (+)-gallocatechin; 4 dimeric proanthocyanidins — (−)-epiafzelechin-(4β-8)-(−)-epicatechin, proanthocyanidin B-2, (−)-epicatechin-(4β-8)-(−)-epigallocatechin, and (−)-epiafzelechin-(4β-8)-(−)-epigallocatechin; and 4 oligomeric proanthocyanidins consisting of epiafzelechin, epigallocatechin, catechin, and epicatechin. 

- Nutrient analysis of fresh, raw fruit (per 100 g) yielded: (Proximates) water 77.86 g, energy 79 kcal, protein 1.20 g, total lipid (fat) 0.20 g, carbohydrate 20-23 g; (Minerals) calcium 21 mg, iron 0.48 mg, magnesium 10 mg, phosphorus 23 mg, potassium 250 mg, sodium 3 mg, zinc 0.05 mg; (Vitamins) vitamin C 69.0 mg, thiamin 0.02 mg, riboflavin 0.04 mg, niacin 0.900 mg, vitamin B6 0.081 mg, vitamin A 40 IU; (Lipids) No cholesterol and trans fatty acids