Complex sentence: Serial dilution is one of the core foundational practices of homeopathy; however, in homeopathy, serial dilutions are often taken so far that by the time the last dilution is completed, no molecules of the original substance are likely to remain.
Split into simpler sentences: Serial dilution is one of the core foundational practices of homeopathy. In homeopathy, serial dilutions are often taken so far that by the time the last dilution is completed, no molecules of the original substance are likely to remain.