The healthcare industry may not carry the same glitz and glamour for investors as other sectors. However, this has proven to be one of the most defensive spaces for investors to focus their capital in both volatile and calm market environments. 

If you're looking to boost your portfolio potential with resilient businesses in the new year, don't overlook these two fantastic companies the next time you go shopping for stocks. 

The rare disease drug market is a fast-growing but historically underserved space on track to see its valuation grow to about $340 billion by the year 2030. A key player in this industry is Vertex Pharmaceuticals (NASDAQ: VRTX), a company that has made a name for itself and built a robust history of profitability around its portfolio of medicines that treat the rare genetic disease cystic fibrosis. 

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Source Fool.com