Optimum NutritionON Gold Standard Pre-Workout Advanced with l-Citrulline, Beta-Alanine and Caffeine, Tropical, 20 Servings, 420 g

This was my first time trying pre-workout. I've previously avoided it as I've been trying to cut caffeine out of my diet but wanted to try taking my workouts to the next level, if only out of morbid curiosity. I made the mistake of not using enough water when I mixed the powder, so the resulting drink was VERY acidic when I drunk it; Optimum Nutrition recommends mixing one serving of three scoops into 400ml of water and this should be heeded.My body's reaction to taking the supplement was immediate. Within minutes, I was having hot flushes and could not sit still, becoming restless and twitchy. I felt a tiny bit nauseous too but not anywhere near the level where there was even a remote risk that my body wouldn't be able to keep the pre-workout down.Immediately wanting to put this sudden burst of energy to use, I began my workout. I'm a cardio person and my exercise of choice is cycling on the stationary bike, seeing how far I can go in an hour-long ride. As soon as I started peddling, I noticed how light my legs felt and very quickly found myself hitting a fast pace by my own standards. I was able to maintain and even slowly increase this pace for the full duration of my session, smashing my previous PB by half a mile.Pre-workout is not a joke. It definitely increased my performance and I plan on using it semi-regularly as part of my exercise routines in such a way where I do not create a tolerance or dependency on it.

Great product and the taste of the blue raspberry is lovely, product arrived well packaged and sealed, so far I would say it's a very effective product and I have had no side effects, definitely found my brand and will continue to purchase them as the boost to energy and quality ingredients, just make sure you read the description correctly as it had a high strength of caffeine

Used this for a pre gym boost! After work I’d be tired and this definitely does the trick! I believe a proper serving size is 3 scoops and I can honesty say you won’t need them! 1-2 scoops is definitely enough! 3 scoops will have you seeing sound! Taste could be better tastes slightly chemically but sometimes strong pre workouts do!

I've tried a lot of different pre workouts from popular name brand ones to the random unknown non-label ones and this is the best by far.It's expensive in my opinion for what it is, but you do get what you pay for. The levels of the various active ingredients are pretty high, better than most, so it is decent value for money in that sense.It is less caffeine dependent than most formulations so you get less of the jittery, headachey buzz and crash of other products. It delivers a nice clear alert focused workout after about 20 minutes. You do get a bit of the signature alanine tingles but nothing escessive if you're used to it.It gives a good pump and helps to push through those challenging workouts or early morning sessions we all dread. I'd recommend using sparingly for maximum impact and to not get to acclimatised to it's ingredients.

On first time use... OK just about. Very mild buzz and ever so slight energy boost but nothing to write home about.Perhaps I'm becoming a bit too used to some of these pre workouts. I think I'll go back to the Nuclear or no explode. Tried as in Black Friday deal. I wouldn't pay the usual amount for this.Tastes really nice though and mixes well. Fruit punch flavour is really pleasant.

Product worked great. I usually just use the normal ON pre-workout but thought I would give this a try. Tasted great but felt the effects were too much and made me feel quite nausious.

Ordered for my husband, he was suggested and he loves it

I’ve used ON before, and to say the least it’s been brilliant. Never reacted funny, as is often the case with some proteins. However, when I received this product I was instantly concerned. Not only did the packaging look much different to the stuff I’ve previously bought directly from ON, it also didn’t conform to their ‘authentic products’ section on their website, leaving me skeptical about whether this product is authentic. After opening it up, it was rather foul smelling and lacked a scoop. Whilst it dissolved well, and did cause a noticeable increase in energy, it tasted very acidic and has left me… I’ll spare the details. Bare in mind, I don’t have a history of a sensitive gut so i’d hate to know the affects on someone who does. Following that, once the initial buzz wore off, I began feeling very bloated and just not motivated at all. From an authentic stand point, i’d stay well clear. From a functional standpoint, it may sit well with you, even though it certainly didn’t for me. Disappointed to say the least, but that’s what you get buying something for much cheaper than it should be. If you’re willing to risk it, buy a small tub incase it doesn’t react well. If that’s the case, listen to your body and stop using it.