TABLE 12.2Antioxidant Effects of Tea in Human Intervention Studies

TreatmentDaysnBiomarkers AffectedUnchanged BiomarkersPP LevelsReferences
BT110TACNot measuredMaxwell and Thorpe 1996
GT, BT110↑ TACNot measuredSerafini et al. 1996
GTE, BTE2845↑ TACMDANot measuredVan het Hof et al. 1997
BT2810TACNot measuredMcAnlis et al. 1998
GTE1↑ TAC↑ Both plasma and urinary catechinsPietta et al. 1998
GT110↑ TAC↑ Urinary PPBenzie et al. 1999
GT, BT120↑ TAC↑ Urinary 4-O-methyl gallic acidHodgson et al. 2000
BT18↑ TACNot measuredLangley-Evans 2000
GTE, BTE121↑ TAC↑ CatechinsLeenen et al. 2000
GT110↑ TACNot measuredSung et al. 2000
BT2850↑ TACNot measuredDuffy et al. 2001
TE15TACCatechin unchangedKimura et al. 2002
TE716↑ TAC
GTE2116↑ TACUrinary 8-OH-G↑ Urinary catechinsYoung et al. 2002
GT, BT, GTE130Only GTE ↑ TACHenning et al. 2004
GT2442↑ TAC ↓ ROOHPP unchangedErba et al. 2005
GTE1208-OH-G TACEGCG unchangedHenning et al. 2005
BT2844TAC, urinary 8OH-G, urinary 8-iso PGF↑ CatechinsWidlansky et al. 2005
BT19↑ TAC↑ PPKyle et al. 2007
GT45100↑ TACNot measuredBertipaglia de Santana et al. 2008
GT714↑ TAC ↓ ROOH↑ PPPanza et al. 2008

Note: BT: black tea; GT: green tea; GTE: green tea extract; PP: Polyphenols; n: number of total subjects; ↑: increase.

From: Chapter 12, Health Benefits of Tea

Cover of Herbal Medicine
Herbal Medicine: Biomolecular and Clinical Aspects. 2nd edition.
Benzie IFF, Wachtel-Galor S, editors.
Boca Raton (FL): CRC Press/Taylor & Francis; 2011.
Copyright © 2011 by Taylor and Francis Group, LLC.

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