Bresaola and spices, such as juniper berries, cinnamon and nutmeg. They are then left to cure for a few days. A drying period of between one and three months follows, depending on the weight of the particular bresaola. The meat loses up to 40% of its original weight during aging. In Valtellina, a similar process is applied to smaller pieces of meat. This produces a more strongly flavoured product, "slinzega", which is similar to South African "biltong". Traditionally, horse meat was used for "slinzega", but now other meats, such as venison and pork, are used, as well. As an antipasto, bresaola
Biltong in acidic conditions (pH less than 4.6), therefore the toxin will not be formed in acidic foods. The antimicrobial properties of certain spices have also been drawn upon since ancient times. The spices introduced to biltong by the Dutch include pepper, coriander, and cloves. In January 2017, a research group at the University of Beira Interior in Portugal published a study on the antimicrobial properties of coriander oil (coriander being one of the main spices in the most basic of biltong recipes) against 12 bacterial strains, and found that 10 of the 12 strains of bacteria were killed with a