RAVENOL Group:
Ravensberger Schmierstoffvertrieb GmbH since 1946 and Deutsche Ölwerke Lubmin GmbH since 2013
Lupus, or Systemic Lupus Erythematosus (SLE), occurs when the immune system mistakenly attacks healthy tissues. The exact cause of lupus is unknown, but it's believed to involve a combination of genetic, environmental, and hormonal factors.