Skip to Content

Can You Drink Relentless Every Day? (Truth)

Avoiding the urge to drink Relentless every day can be difficult, especially with its five unique flavours.

If you’re wondering how safe it is for consumption, rest assured, having one can of Relentless every day won’t cause you any harm, but you should avoid doing so if possible.

While energy drinks have plenty of benefits, excessive consumption can lead to adverse side effects. This is why it’s important to keep your energy drink use in moderation.

Now, if you’re wondering what the pros and cons of drinking Relentless regularly are, you’ve come to the right place.

Read on to find out!

Ingredients in Relentless Energy Drink

Here’s a list of ingredients present in a regular Relentless can for all you health-aware people.

EnergisersCaffeine, Guarana Seed Extract
WaterCarbonated Water
PreservativesPotassium Sorbate, Sodium Benzoate,
Sodium Citrate
AcidCitric Acid
VitaminsTaurine, Niacinamide,
Pantothenic Acid, Pyridoxine Cobalamin
Sweeteners Sucralose, Sucrose
Flavour EnhancerErythritol
ColourCaramel E150d
Ingredients of Relentless

Nutritional Content of Relentless Energy Drink

Now that you know all the specific ingredients present in Relentless, here’s the quantity of each one of them, as displayed on the drink’s can.

Relentless Energy Ingredients
IngredientQuantity (500mL)Daily Value (%DV)
(108 kCal)
(Excluding Sugar)
Pantothenic Acid8.5mg142%
Vitamin B61.5mg107%
Vitamin B122.0μg86%
Data table for Relentless Energy Ingredients

Is Relentless High in Caffeine?

Every 500mL (16 fl.oz) of Relentless contains 160mg of caffeine.

While the quantity of caffeine present in Relentless is not the highest and comparatively lesser than most of its other competitors, you should avoid having more than one can a day.

In my opinion, 160mg is just enough to give you a sizeable energy boost without venturing too much into overdose territory. However, taking more than one can a day can quickly result in adverse side effects like headaches, insomnia, and anxiety.

Does Relentless Have a High Amount of Sugar?

While not the highest, the 25g of sugar present in Relentless can cause harm in people with prior health conditions.

The American Heart Association (AHA) suggests a daily sugar intake of 24g for women and 36g for men. However, average American consume 22g of sugar a day which equates to an extra 350 calories.

This is an area where Relentless falls behind its competitors. Companies like Bang, Xyience and Celsius have started replacing table sugar with healthier and calorie-free artificial sweeteners like Sucralose.

If you have diabetes or other related health conditions, I would advise you not to consume Relentless. Instead, you may want to consider sugar-free energy drink brands.

Calories in Relentless Energy Drink

Relentless comes with 108 calories in its 500mL (16 fl. oz) can.

If you’re looking to lose weight or are on a calorie-restricted diet, Relentless is not the drink for you. The additional 108 calories would just add to the calories you have to burn in the gym.

Is too many calories bad for you?

Well, technically, yes. Nutrition researchers recommend burning the calories that you ingest. If you don’t do otherwise, these calories will be stored as fats and can potentially lead to obesity.

How Long do the Effects of Relentless Last?

The 160mg of caffeine present in Relentless should give you a significant energy boost.

But how long does this effect last exactly? Studies have shown that caffeine’s effects can range from four to six hours.

So one can of Relentless should be enough to carry you through an entire workday.

Side Effects of a Caffeine Overdose

The FDA recommends people have no more than 400mg of caffeine per day. This roughly equates to two cans of Relentless.

It is important to keep track of your other sources of caffeine alongside Relentless as well. Exceeding the 400mg mark can cause the following side effects:

  • Restlessness
  • Insomnia
  • Dehydration
  • Dizzyness
  • Rapid or Abnormal Hearbeat
  • Anxiety
  • Headaches

The video below discusses caffeine’s effects on the body in detail.

What happens when you have too much caffeine?

Downsides of a Sugar Overload

Having large quantities of sugar can lead to several adverse health effects. Some of these are given below.

Symptoms of high sugar intake include:

  • Weight gain
  • Increased sugar cravings
  • Fatigue and low energy
  • High blood pressure
  • Acne and wrinkles

What are the Long-Term Side Effects of Relentless?

Drinking copious amounts of Relentless daily can lead to long term side effects that can affect your health.

Take note!

Caffeine Dependency

Regularly drinking Relentless can cause you to become reliant on it. Just like any other drug, addiction to caffeine can compel you to consume more and more quantities of caffeine to achieve the same effect.

Not having caffeine can cause you to suffer from withdrawal symptoms, such as headaches, drowsiness, and fatigue.


Regular usage of caffeine to stay up at night can render you unable to sleep even on nights you have not had any caffeinated beverages.

You are also likely to suffer from sleeplessness, anxiety, and frequent nighttime awakenings.

Can Pregnant Women Drink Relentless?

Energy drinks, including Relentless, are not recommended for pregnant women.

Most energy drinks contain a high level of caffeine which is not suitable and ideal during pregnancy, as this may cause certain effects like congenital disabilities, certain syndromes, and such.

Drinking a high amount of caffeine may also result in low birth weight and, in some cases, might even cause miscarriage.

Can Teenagers and Children Drink Relentless?

No, Relentless is not recommended for teenagers and children.

Teenagers and adolescents are recommended to only have a maximum of 100mg caffeine per day.

Since one can of Relentless contains 160mg of caffeine, it goes to say that the drink is not recommended for teenagers or children.

Is Relentless a Pre-Workout Energy Drink?

If you’re exercising to lose weight, Relentless is not the right pre-workout energy drink for you.

As I previously mentioned, Relentless contains a substantial amount of calories that will add to the fat you’ll have to burn off in the gym.

However, if you’re building muscle mass and drinking Relentless to fuel your workout, it can be beneficial for you.

Building muscles require a significant amount of calorie intake every day, and Relentless will aid you in achieving this amount.

Can You Drink Relentless Every Day?

As one can of Relentless contains 160mg of caffeine, it should be alright to have one can each day.

Note that exceeding 400mg per day can cause you to suffer from the side effects mentioned above.

Is It Good for You?

Relentless can help you stay awake on nights you wish to study or pull you through a workday if you couldn’t sleep the previous night.

However, excessive use can lead to some side effects because of the drink’s caffeine content.

Best Time to Drink Relentless?

Early in the morning and mid-day are the best times to have a can of Relentless.

Drinking it right before a workout or your early morning commute will hit just the right spot.

I wouldn’t really advise taking Relentless or any energy drinks during afternoons or at night since the caffeine boost will most likely interfere with your sleep schedule.

Relentless Energy Drink Alternatives

If, for some reason, Relentless isn’t your cup of tea, there are plenty of other brands that have similar ingredients and nutritional value.

Check them out!

Xyience Energy

Xyience Energy Drinks Frostberry Flavor
Xyience Energy – Frostberry Blast

Having been in the market for over a decade, it would be safe to assume they know what they are doing.

A 16 fl. oz can of Xyience contains 176mg of caffeine, just slightly more than Relentless.

Its eight unique flavours mean that there is one for everyone! Have a taste of all and see for yourself which you like best.

Monster Energy Drink

Monster Energy
Monster Energy

Monster is the second most popular energy drink, right behind Red Bull.

Monster contains 160mg of caffeine in a 500mL drink, those who prefer Relentless will also enjoy Monster due to the same caffeine content.

If you don’t like the taste of the original Monster, try one of the other 34 flavours.

Other Noteworthy Mentions:

Final Thoughts

If taken in moderate amounts, Relentless can be enjoyed every day.

Make sure you don’t overdo it; doing so can result in insomnia and caffeine addiction, rendering you completely reliant on the drink.

Aside from the caffeine content, Relentless also has a considerable amount of sugar and calories, which can be detrimental to your health in the long run.

At the end of the day, there are many energy drink brands out there that can offer you the same benefits that Relentless does without the sugar and calorie content.

So take your time in finding the right energy drink for you! In the meantime, you can browse these other articles.

Other Articles