PARASORBIC ACID, a cyclic lactone of sorbic acid, was isolated from ripe berries of mountain ash (Sorbus aucuparia). It produced local sarcomas being administered by subcutaneous injection to rats.

Tannic acid (TA) is a naturally occurring plant-derived polyphenol found in several herbaceous and woody plants, wines and a broad selection of teas. TA has strong antioxidant/free radical scavenging, anti-inflammatory, anti-viral/bacterial, and anti-carcinogenic properties. The neuroprotective effects of TA against Alzheimer’s disease (AD) have been shown in several in vitro and in vivo models of AD. Evidence suggests that TA is a natural inhibitor of β-secretase (BACE1) activity and protein expression. BACE1 is the primary enzyme responsible for the production and deposition of Aβ peptide. TA can also inhibit the in vitro aggregation of tau peptide, a core component of intracellular neurofibrillary tangles (NFTs). In addition, combination of tannic acid with eucalyptus Oil and Allantoin (from Comfrey) is known as homeopathic product which is used to temporarily relieve the aches and pains of muscles and joints associated with: arthritis, simple backache, strains, bruises, sprains.