Native to South Africa, umcka (short for "umckaloabo") is an herbal extract known for its antibacterial and immune-boosting properties. It is derived from the plant Pelargonium sidoides, whose medicinal qualities have been utilized by African cultures for centuries. Studies have shown that umckaloabo works similarly to other immune boosters found in nature such as elderberry (Sambucus or Sambucol) but, what makes this over-the-counter extract uniquely effective is its ability to combat infections brought on by either viruses or bacteria. Aside from Umcka's dual antibacterial/antiviral qualities, it also serves as a natural expectorant, helping to remove excess mucus from the sinuses and respiratory tract. For fighting a cold, it's best to use Umcka within 48 hours of showing symptoms. We've had great success with it for combating colds as well as bronchitis, even with kids!