what can i take before a presentation or an interview?

the three constraints nobody names

fast, because you are not thinking about this an hour ahead — you are thinking about it now, at six minutes out.

non-drowsy, because you have to be sharp in the room. this rules out the entire sleep aisle.

discreet, because you may be in a lobby, at a table, or on camera in a waiting room. a glass of water and a capsule is conspicuous in a way a piece of gum is not.

why chewing is unusually well suited to this specific moment

in a 2009 controlled trial, chewing gum during an acute laboratory stress task lowered salivary cortisol and improved self-reported mood against a group that did not chew. the effect was attributed to the chewing, not to any ingredient.

sketchley-kaye and colleagues (2011) tested exactly this setting — chewing gum under conditions of SOCIAL stress — and reported changes in state anxiety and alertness. that is the closest published analogue to standing outside a room waiting to go in.

there is something almost mechanical about why that might help. your body reads the rhythm of chewing as a signal that nothing is currently chasing you. you would not be chewing if you were running. that is a plausible story rather than a proven mechanism, and johnson and colleagues (2011) published a re-examination that found the picture less tidy than the early results suggested.

so a chewable is doing two things in that six-minute window: the format is working, and the actives are taking the shorter route in behind it.

the honest caveat

nothing on a shelf makes a hard thing easy. the first sentence is still the threshold, and you still have to walk through it. what a fast calm option can do is take some of the edge off the waiting, which is usually the part that is worst.

if what you are describing to yourself is more than ordinary nerves, that is a conversation for a doctor rather than a supplement question.

common follow-ups

sources

1. Scholey and colleagues (2009). Chewing gum alleviates negative mood and reduces cortisol during acute laboratory psychological stress. Physiology & Behavior.
2. Sketchley-Kaye and colleagues (2011). Chewing gum modifies state anxiety and alertness under conditions of social stress. Nutritional Neuroscience.
3. Johnson and colleagues (2011). Chewing gum moderates multi-task induced shifts in stress, mood, and alertness. A re-examination. Appetite.
4. Kimura and colleagues (2007). L-Theanine reduces psychological and physiological stress responses. Biological Psychology.
5. Hidese and colleagues (2019). Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients.

These references describe research on the ingredients, not on Nula Calm Gum. Last reviewed August 17, 2026.