The Sense of Smell Institute says that in this white paper "we provide an overview regarding chemical communication in humans. A recent concise review article appearing in Nature has summarized the 50 year history and science of chemical communication, employing pheromones, in both insects and mammals. The definitions and terms describing the various types of pheromones will be reiterated here as they apply to humans. Sufficient evidence has accumulated to demonstrate that humans do produce and receive pheromones..."
They took a skeptical look at online pheromone sales, but say "human body odors do contain substances that affect mood and alter endocrine function. Hence, there is tremendous potential to be realized for anyone willing to invest the capital and time necessary to isolate compounds documented to be present in human body odor that affect changes in human physiology and behavior."
Read the whole paper here, as a pdf.