Medical and Health

When browsing cannabis strains or purchasing cannabis at a shop, you may notice strains are commonly broken up into two distinct groups: indica and sativa. Most consumers have used these two cannabis types as a touchstone for predicting effects:

  • Indica strains are believed to be physically sedating, perfect for relaxing with a movie or as a nightcap before bed.
  • Sativas tend to provide more invigorating, uplifting cerebral effects that pair well with physical activity, social gatherings, and creative projects.

This belief that indicas and sativas deliver distinct effects is so deeply rooted in mainstream cannabis culture that budtenders typically begin their strain recommendations by asking you which of these three types you prefer.

However, data collected by cannabis researchers suggests these categories aren’t as prescriptive as one might hope—in other words, there’s little evidence to suggest that indicas and sativas exhibit a consistent pattern of chemical profiles that would make one inherently sedating and the other uplifting. We do know that indica and sativa cannabis strains look different and grow differently, but this distinction is primarily useful only to cannabis cultivators.

So how exactly did the words “indica” and “sativa” make it into the vernacular of cannabis consumers worldwide, and to what extent are they meaningful when choosing a strain?

 

The words “indica” and “sativa” were introduced in the 18th century to describe different species of cannabis: Cannabis sativa and Cannabis indica.The term sativa, named by Carl Linneaus, described hemp plants found in Europe and western Eurasia, where it was cultivated for its fiber and seeds. Cannabis indica, named by Jean-Baptiste Lamarck, describes the psychoactive varieties discovered in India, where it was harvested for its seeds, fiber, and hashish production.

Although the cannabis varieties we consume largely stem from Cannabis indica, both terms are used–even if erroneously–to organize the thousands of strains circulating the market today.

Here’s how terms have shifted since their earliest botanical definitions:

  • Today, “sativa” refers to tall, narrow-leaf varieties of cannabis, thought to induce energizing effects. However, these narrow-leaf drug (NLD) varieties were originally Cannabis indica ssp. indica.
  • “Indica” has come to describe stout, broad-leaf plants, thought to deliver sedating effects. These broad-leaf drug (BLD) varieties are technically Cannabis indica ssp. afghanica.
  • What we call “hemp” refers to the industrial, non-intoxicating varieties harvested primarily for fiber, seeds, and CBD. However, this was originally named Cannabis sativa.

Confused? Understandably so. As you can see, with the mass commercialization of cannabis, the taxonomical distinctions between cannabis species and subspecies got turned on its head and calcified. It seems the contemporary use of indica and sativa descriptors is here to stay, but as an informed consumer, it’s important to understand the practical value of these categories—which brings us to the research.

Indica vs. Sativa Effects: What Does the Research Say?

This three-type system we use to predict cannabis effects is no doubt convenient, especially when first entering the vast, overwhelming world of cannabis. With so many strains and products to choose from, where else are we to begin?

“The clinical effects of the cannabis chemovar have nothing to do with whether the plant is tall and sparse vs. short and bushy, or whether the leaflets are narrow or broad.”

Ethan Russo, neurologist and cannabis researcher

The answer is cannabinoids and terpenes, two words you should put in your back pocket if you haven’t already. We’ll get to know these terms shortly.

But first, we asked two prominent cannabis researchers if sativa/indica classification should have any bearing on a consumer’s strain selection. Ethan Russo is a neurologist whose research in cannabis psychopharmacology is respected worldwide, and Jeffrey Raber, Ph.D., is a chemist who founded the first independent testing lab to analyze cannabis terpenes in a commercial capacity, The Werc Shop.

“The way that the sativa and indica labels are utilized in commerce is nonsense,” Russo told Leafly. “The clinical effects of the cannabis chemovar have nothing to do with whether the plant is tall and sparse vs. short and bushy, or whether the leaflets are narrow or broad.”