A dollop of creamy dairy butter and slug of oil in your coffee could boost brain power.

That’s the claim by Wharf-based brand Crussh, which has teamed up with bio-hacker Dave Asprey to whip up his signature Bulletproof recipe.

The magic, he believes, is in Medium Chain Triglycerides (MCT) derived from coconut and palm kernel oil.

These healthy fats are almost instantly dissolved by the body - providing speedy energy for the brain, omega-3’s and a slow-caffeine release to avoid coffee crashes.

Combined with grass-fed butter and organic and Fairtrade beans from Santa Rosa, it is available in both the Crussh Smart Coffee and Brain Octane varieties.

Go to Crussh in Canada and Jubilee Place malls, priced from £3.50.