MCT, or medium chain triglyceride, oil is available from Puritan's Pride, Amazon.com and Bodybuilding.com as of March 2015. Each site lists different sizes of liquid MCT oil, and Amazon.com offers powder, capsule and softgel product options as well.
Puritan's Pride sells a 1,000 milligram bottle of its own brand of MCT oil, and the product contains no artificial flavors or preservatives. Amazon.com has several brands, sizes and varieties of the oil available, including organic MCT oil and combination products that also contain coconut oil. Bodybuilding.com sells one brand of MCT oil, which is 100 percent pure and comes in a 32-ounce bottle.