side effects pre workout

Side effects of pre workout

You might have seen pre-workout pre-mix sold in your gym, or at your local supplement store and be wondering how it will make you feel and what are the side effects of pre workout. You may have heard stories from friends of friends about it giving them face tingles, the shakes or that they felt like a beast in the gym. 

In this blog, we will tell you how pre-workout might make you feel, and which one is best for you to try, depending on how intense you want things. 

Ingredients you might find in a pre

Pre workout often contains the following ingredients, but not always as different brands vary:

  • Amino acids
  • Caffeine 
  • Beta-alanine 
  • Taurine 

What are these ingredients and what do they help with?

Good question. All of the ingredients in pre workout play a part in getting you energized, focused and well recovered after the session.


Beta-alanine is a non-essential amino acid. Your body uses it to produce carnosine. Carnosine reduces lactic acid accumulation in your muscles. In turn, this improves exercise performance.

Amino acids

Amino acids are building blocks. They support muscles and promote energy production. Just what you need pre and post workout.


Just like your morning cup of coffee gets you ready for the day, caffeine added to your pre workout mix can boost your energy. Read our blog coffee vs preworkout to see which might be better for you. 


You might have heard of taurine in energy drinks. It is similar to creatine in helping with muscle hypertrophy to increase endurance, strength while increasing recovery. 

What are the side effects of pre workout?

  • Boosts energy 
  • Increases time to failure so you can smash more reps
  • Draws water into the muscles for that “swole” look
  • Improves focus and attention
  • Enhances performance allowing you to train harder and for longer

Side effects of ore workout that might be a little less welcome COULD include:

  • Unable to sleep
  • Irritability
  • High blood pressure
  • Feeling sick
  • Dehydration
  • Diarrhoea

The negative side effects will often cause you trouble if you are very sensitive to caffeine or if you take it on an empty stomach,

What pre workout should I try?

There are some great pre workouts on the market, some are stronger than others. We always suggest that you start off on a low dose and increase it once you know your tolerance. Here are three pre workouts to try, starting with the strongest heading down to the one perfect for those who are sensitive to caffeine.


pre workout

Alpha Darkside is a strong pre workout and one of our best sellers. It’s not for the faint hearted.

The ingredient that is key in this potent pre workout is Kigelia Africana. This has a powerful effect on the body and mind and is a potential natural stimulant as it is the natural version of DMHA. 

Side effects of this pre workout

  • Energised
  • Buzzy
  • Tunnel vision and focused
  • Pumped

If you are sensitive to pre workout, then this isn’t for you though.

Shop now for Darkside >

Knockout 2.0

knockout 2.0 pre workout

Knockout 2.0 is one for you if you are looking for a sick pump. It will be sure to boost your energy too, with 200mg worth of caffeine per portion. 

Caffeine increases performance, decreases fatigue and promotes fat burning. 

How will this preworkout make me feel?

  • Face tingles
  • Energised for a long time
  • A buzz for your lifting sesh
  • Strong and focused
  • Pumped

V8 Extreme

v8 pre workout stim free

Here’s a pre that made our top stim free pre workouts. It is one for those who want to get a pump and look ‘swole’ after a session. It doesn’t have stimulants in it, which means you’ll avoid the sleepless night that is a preworkout side effect when taken too close to bedtime.

The blend of B3, B5 and B12 in addition to amino acids. It contains Creatine, L-Glutamine, Taurine, L-Citrulline and Betaine.

Perfect if you are sensitive to stimulants and or train in the evening.

Key things to remember when taking pre workout:

  • Don’t take it within 3 hours of going to bed unless you don’t fancy sleeping easily
  • Make sure you start with a low dose and increase over time 
  • Wait 30 minutes to feel the effects 
  • Only buy from reputable sites to avoid illegal ingredients and stimulants

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