The effects typically last 3–5 hours. Caffeine's half-life averages about five hours regardless of how it's delivered. Gum changes how fast it arrives, not how long it stays. A piece chewed after 3pm still has roughly half its caffeine circulating at 8pm, so if sleep matters that night, take your dose earlier in the day.

Each piece of REV (Energy or Electrolyte) can be chewed for 30 minutes to an hour before losing flavor, similar to traditional gum.

Yes, the same buccal absorption that delivers caffeine works for electrolytes. Electrolyte gum delivers potassium and magnesium through the lining of your mouth, no liquid required. That matters in exactly the situations where sports drinks fail: long runs where you won't carry a bottle, work shifts where you can't keep stopping, or any time you want to replenish without 30g of sugar. It's replenishment, not hydration — you still need water — but it decouples your electrolyte intake from your fluid intake.

Yes. WADA removed caffeine from its prohibited list in 2004, and it remains permitted in Olympic, professional, and amateur competition. This is exactly why caffeine gum is studied in professional rugby, running, and cycling: it's the most effective legal ergogenic aid available.

Sports-science research generally finds performance benefits at 3–6mg of caffeine per kilogram of body weight. For a 170lb (77kg) adult, that's roughly 230–460mg. Meaningful effects on endurance and perceived effort show up at lower doses, and most people don't need the top of that range. One to two pieces of Extra Strength (100–200mg) puts most adults well into the effective zone. Because gum absorbs in minutes rather than the 45+ required for coffee, chew about 5–10 minutes before you start — not half an hour like you would with a pre-workout drink.

At normal doses, it's unlikely. Jitters come from how much caffeine you take and sometimes other compounding ingredients in energy drinks and pre-workouts. The only 'energy booster' ingredient in REV is simple caffeine and there's no sugar, taurine, beta-alanine or anything else to cause negative side effects. REV Energy Gum contains a precise dose of caffeine in every piece, so you can start with one and add more if you need it all while keeping your total caffeine intake in control.

Not at normal doses. The "coffee dehydrates you" idea comes from old studies using large caffeine doses in people who weren't regular users. Modern research shows that moderate caffeine intake (the range you'd get from REV) produces no meaningful net fluid loss, and habitual caffeine users develop tolerance to the mild diuretic effect within days. Caffeine gum has one additional advantage here: unlike coffee or energy drinks, there's nothing to drink at all. Your caffeine intake and your hydration strategy stay independent.

REV Energy Gum contains 60mg of caffeine per piece (Performance) or 100mg per piece (Extra Strength). For comparison: a shot of espresso has about 63mg, an 8oz cup of brewed coffee about 95mg, and an 8.4oz Red Bull 80mg. One piece of Extra Strength delivers roughly the caffeine of a coffee, but in a precise and repeatable dose. Coffee's caffeine content swings widely with bean, roast, and brew time, while every piece of REV is identical. Caffeine from gum also kicks in about 5 times faster than drinks.