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Liver Support Formula (Bu Gan Tang) is derived directly from Bu Gan Tang (Tonify the Liver Decoction), a formula which has been in use for over 250 years since its original publication by Wu Qian in 1742 in Golden Mirror, the Medical Tradition (Yi Zong Jin Jian).

Empty Heat and Yang rising symptoms may not be as prominent in animals benefiting from this formula. Yin deficiency may be present but is perhaps only hinted at by a tendency to weight loss despite good appetite and normal stools. Liver Support Formula is chiefly a dog formula, given that dogs are more prone to Liver Blood deficiency.

White peony root, Sichuan lovage rhizome, Dong quai root and prepared Rehmannia root constitute Four Substances (Si Wu Tang), developed almost six hundred years earlier to tonify Liver Blood, and is a part of this formula.

Chinese quince fruit was added to relax occasional muscle spasms through increasing peripheral Blood circulation, while the rest of the herbs nourish the Heart. Sweet-tasting Chinese licorice root and rhizome tonifies Heart Qi. Sour-tasting Ophiopogon tuber addresses Heart Yin deficiency. Sour-tasting dry fried Sour jujube seed supports Yin. Overall, the mixing of sweet and sour herbs has a potent Yin-tonifying and nourishing effect.