Pre-workout is easier to stick with when it actually tastes good.

Transparent Labs gets this right.

They don’t use artificial coloring or sweeteners, everything is naturally flavored with stevia, and even their “other ingredients” are transparently dosed.

I tested all 9 flavors of Transparent Labs Bulk, ranked them, and built comparison tables so you can decide in seconds.

Use code FITFREK for a discount at checkout.

Quick Picks (If You Don’t Want to Read Everything)

• Best candy vibe → Sour Grape

• Best daily driver → Tropical Punch

• Most unique flavor → Pineapple Coconut (Pina Colada)

• Safest middle ground → Peach Mango

• Skip it → Strawberry Lemonade

How I Tested

• Mixed each flavor with the recommended 10–12oz water.

• Checked mixability, sweetness, aftertaste, and smell.

• Reset palate with water and apple slices between flavors.

• Re-tested flavors on different days for consistency.

This isn’t just a one-time sip review.

It’s a full taste test experiment.

Top Tier (Best of the Best)

1. Sour Grape

Strong, candy-like, with sour upfront and grape sweetness in the back.
Smells like grape candy — nostalgic and bold.

• Flavor accuracy: 9/10

• Sweetness: 8/10

• Daily drinkability: 8–9/10

• Buy again? Yes

Perfect if you want something fun that never feels boring.

2. Tropical Punch

Balanced, smooth, and less sour than most Bulk flavors.

Hints of pineapple and peach make it easy to drink daily.

• Flavor accuracy: 9.5/10

• Sweetness: 7–8/10

• Daily drinkability: 9/10

• Buy again? Yes

This is the safest “everyday” flavor.

3. Pineapple Coconut (Pina Colada)

Creamy pineapple upfront, coconut in the background.
Surprisingly natural, not artificial.

• Flavor accuracy: 9/10

• Sweetness: 7/10

• Daily drinkability: 8/10

• Buy again? Yes

If you like tropical vibes, this is the most refreshing option.

Middle Tier (Good but Not Elite)

4. Peach Mango

Peach dominates, mango lingers in the background.
Balanced overall, slightly tart.

• Flavor accuracy: 7/10

• Sweetness: 5–6/10

• Daily drinkability: 7/10

• Buy again? Maybe

Reliable but not exciting.

5. Black Cherry

Strong, candy-like cherry flavor with a slight artificial edge.

Good in small doses, but heavy daily.

• Flavor accuracy: 8/10

• Sweetness: 6–7/10

• Daily drinkability: 7/10

• Buy again? Maybe

Great for cherry fans, but too much for everyday.

6. Blue Raspberry

Classic candy-style taste, clean and smooth.

Mixes pale yellow (no artificial dye).

• Flavor accuracy: 7/10

• Sweetness: 8/10

• Daily drinkability: 7/10

• Buy again? No

Safe option, but a bit generic compared to the top tier.

Bottom Tier (Flavors You Can Skip)

7. Watermelon

Refreshing at first, but artificial aftertaste drags it down.

• Flavor accuracy: 8/10

• Sweetness: 7/10

• Daily drinkability: 6/10

• Buy again? No

8. Strawberry Kiwi

Mostly strawberry, kiwi is faint.
Sweet but unrefined.

• Flavor accuracy: 7/10

• Sweetness: 8/10

• Daily drinkability: 6–7/10

• Buy again? No

9. Strawberry Lemonade

Very tart lemon with almost no strawberry.

Overly sour, not balanced.

• Flavor accuracy: 6–7/10

• Sweetness: 6/10

• Daily drinkability: 5/10

• Buy again? No

The weakest flavor in the lineup.

Extra Comparisons

• Best smell: Pineapple Coconut

• Most nostalgic: Sour Grape

• Most balanced: Tropical Punch

• Safest if you hate candy flavors: Peach Mango

Why Transparent Labs Bulk Stands Out

• All-natural flavors → no dyes, no sucralose, no acesulfame K

• Fully transparent label → every ingredient and dose listed

• Clinically dosed ingredients → 8g citrulline, 4g beta-alanine, 2.5g betaine, 200mg caffeine (PurCaf), plus nootropics

• Proven performance → clean energy, smooth focus, no crash

It’s not just about taste.

It’s about having a pre-workout that’s as clean as it is effective.

Bottom Line

Transparent Labs Bulk has 9 flavors worth trying.
Some are candy-like, some are balanced, and a few miss the mark.

If you want to keep it simple:

• Sour Grape = fun, candy blast

• Tropical Punch = reliable every day

• Pineapple Coconut = tropical and unique

Check Transparent Labs Bulk here (use code FITFREK for a discount).

FAQs

Are all Transparent Labs Bulk flavors sour?

Most have at least a tart edge, but Tropical Punch and Peach Mango are smoother.

Which is the least sour flavor?

Blue Raspberry — it’s more neutral and candy-like.

Which one is best for daily drinking?

Tropical Punch — balanced, not overwhelming.

Are these flavors artificially sweetened?

No. Bulk uses stevia only, no dyes or artificial sweeteners.

Do flavors change the formula?

No. All flavors have the same dosages and performance.

The Dangers of Artificial Sweeteners

While artificial sweeteners may seem like a good alternative to sugar due to their zero-calorie content, they are not without risks.

Some studies have shown that artificial sweeteners can stimulate the horizontal transfer of antibiotic-resistance genes through natural transformation.

This means they could potentially contribute to the global threat of antimicrobial resistance.

In addition, artificial sweeteners can increase cell envelope permeability and result in an upregulation of genes encoding DNA uptake and translocation machinery.

These effects could have implications for gut health and overall wellbeing.

In conclusion, choosing pre-workout supplements like those from Transparent Labs that use natural sweeteners is a healthier option.

Not only do you get to enjoy delicious flavors, but you also avoid the potential risks associated with artificial sweeteners.

Here are the common artificial sweeteners and their risks...

Sucralose

Sucralose is a widely used artificial sweetener.

It's known for its zero-calorie content and its ability to withstand heat, making it suitable for cooking and baking.

However, research has shown that it can have some side effects.

According to a study, sucralose can alter the gut microbiota, potentially leading to inflammation and other digestive issues. It's also been linked to an increased risk of developing type 2 diabetes.

Aspartame

Aspartame is another popular artificial sweetener, often found in diet sodas and low-calorie foods.

While it's generally considered safe, some studies have suggested potential side effects.

A study found that aspartame could potentially lead to oxidative stress and inflammation in the brain. It's also been suggested that aspartame might contribute to headaches in some individuals.

Saccharin

Saccharin is one of the oldest artificial sweeteners and is often used in tabletop sweeteners, diet drinks, and low-calorie foods.

While it was once linked to cancer in rats, further research has shown that this effect does not apply to humans.

However, some people may experience allergic reactions to saccharin, including headaches, breathing difficulties, skin eruptions, and diarrhea.

Ingredients in Transparent Labs Pre-Workouts

Let's start with Bulk and explain how each ingredient helps. 

Bulk Pre-Workout

Bulk pre-workout is a powerful supplement designed to enhance your workout performance.

It contains a blend of ingredients that work together to increase energy, improve focus, and boost muscle endurance.

The key ingredients include Citrulline Malate (8g) which helps improve blood flow and reduce muscle soreness, Beta Alanine (4g) known for its ability to delay muscle fatigue, and BetaPure (2.5g) which enhances muscle power during workouts. It also contains Taurine (1.3g) for better hydration and Tyrosine (1g) for improved focus.

The stimulants in this pre-workout are PurCaffeine (200mg) and Theobromine (50mg), providing a sustained energy boost.

Ingredients:

• Citrulline Malate (8g)
• Beta Alanine (4g)
• BetaPure (2.5g)
• Taurine (1.3g)
• Tyrosine (1g)
• Alpha GPC (300mg)
• L-Theanine (200mg)
• Senactiv (50mg)
• Bioperine (5mg)
• Boron Citrate (3000mcg)
• PurCaffeine (200mg)
• Theobromine (50mg)

Bulk Black Pre-Workout

Bulk Black pre-workout is a more potent version of the original Bulk pre-workout.

It contains a similar blend of ingredients but with a few key differences.

The Betaine Anhydrous (2.5g) in this formula is known for its muscle-building properties, and AlphaSize (300mg) is included for its cognitive-enhancing effects.

The stimulants in this pre-workout are Caffeine (275mg), Theobromine (50mg), and DiCaffeine Malate (30mg) which provide a powerful and sustained energy boost.

Ingredients:

• Citrulline Malate (8g)
• Beta Alanine (4g)
• Betaine Anhydrous (2.5g)
• Taurine (1.3g)
• Tyrosine (1g)
• AlphaSize (300mg)
• Theanine (200mg)
• Astragin (50mg)
• Boron Citrate (3mg)
• Caffeine (275mg)
• Theobromine (50mg)
• DiCaffeine Malate (30mg)