Sunscreen compositions containing an extract of Curcuma longa L. are provided, the sunscreens having an absorption that spans the UVA and UVB ranges in a manner that meets updated FDA recommendations without requiring the addition of titanium dioxide. The sunscreens can also include an extraction solvent that is at least substantially non-toxic and useful also as a pharmaceutically acceptable carrier in liquid dosage forms. Microemulsions and nanoemulsions are also provided to enhance the bioavailability and stability of the extracts in the sunscreens.