If you thought the latter, you're a step ahead of the rest. The latest ingredient to take the health and beauty industry by storm is in fact cannabis, or at least an ingredient derived from cannabis - CBD or "cannabis oil".
CBD is one of the key chemical components (cannabinoids) of cannabis, and is showing huge promise in the treatment and alleviation of a long list of medical conditions and skin concerns.
When it comes to skincare and beauty, CBD is a potent antioxidant, helping to neutralise oxidative stress from pollution, UV and other environmental aggressors. Plus, due to the fact it's a natural molecule, the skin has pre-existing receptors for it, allowing the extracts to be instantly and more efficiently absorbed.
Just a few of the beauty brands blazing a trail are , , and , all of which offer nourishing lotions and serums containing the star ingredient.
But above and beyond cannabis's beauty benefits, it's also proving to have more profound medical uses, proven to alleviate symptoms of epilepsy, multiple sclerosis and chronic pain.
Currently, CBD is legal in the UK, but another component of the drug, THC, is still illegal. THC is the psychoactive component of cannabis and causes the feeling of being 'stoned'. Luckily, if the level of CBD is high enough, the psychoactive side effects of THC are counteracted.
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Recent studies have revealed that the benefits of CBD can only be fully realised when it's combined with THC, leaving people who could potentially benefit from treatment at a loss.
Last month, Hannah Deacon, a mother of a boy, Alfie, who has severe epilepsy, was allowed to bring medicinal cannabis oil into the UK for the first time, following a painful legal battle.
When being treated with this medicinal cannabis oil, Alfie's life-threatening seizures reduce from 100 per day, to one per month.
The case sparked debate among politicians over whether the UK should follow in the footsteps of Canada and 26 states in USA and legalise cannabis for medicinal use. Hopes are certainly high...