It is now used as a regular part of feeding, and accepted as a natural antibiotic, believed to assist with arthritis and joint conditions. Apple cider vinegar must not be confused with manufactured cider Vinegars, since genuine Apple Cider Vinegar has many essential natural advantages over processed vinegars. NRG ACV is naturally fermented, unfiltered and most importantly, unpasturised. NRG Vinegar has an acidity rating of 4.5% - 5% - the international standard being 4%. Assists with cleansing the digestive tract and balances the acid/alkaline ratio helps to oxygenate blood and is known to assist with horses that tie-up Can be used as a wash to assist with reduced insect biting and as a good anti fungal wash.