Pre workout supplements are one of the most used supplements for bodybuilders and athletes for good reasons:

To increase blood flow and circulation to the muscles for more endurance and power.

Boost stamina and improve mental focus.

Increase energy levels and combat fatigue.

Boost natural growth hormones.

Promote lean muscle mass.

Reduce body fat.

Enhance immune system.

Improve oxygen flow and help transport muscle building nutrients to your muscle cells.

Basically pre workout supplements will give you the "pump effect" resulting in a more intense workout as your performance goes through the roof.

There are two categories of pre workout supplements:

(1) Those which use 100% wholefood ingredients like

Asian ginseng root extract
Yohimbe bark extract
Green tea leaf extract
Goji berry
Maqui berry
Acai berry
Beet root
Cinnamon bark powder

and

(2) Those which use mostly ingredients like

Creatine Monohydrate
L-Arginine
L-Carnitine
Beta Alanine

L-Citrulline Malate - This critical ingredient in a pre workout is converted to L-Arginine by your kidneys which in turn is converted into nitric oxide, a chemical which can improve blood flow by widening your blood vessels. This has the benefit of increasing oxygen uptake to your muscles during exercise for enhanced energy, endurance, strength, improved performance and a more intense workout.

Caffeine Anhydrous

Both these type of supplements deliver results although people who go through more hardcore workouts will find ingredients like L-Citrulline Malate and Creatine Monohydrate more effective but whichever you prefer, it's also mostly a matter of taste. One of the major concerns many people have about pre workout supplements is the use of sucralose also known as splenda. Sucralose is a semisynthetic artificial sweetener and is about 600 times sweeter than table sugar. Since the bulk of ingested sucralose is not broken down by the body, it's non-caloric but that's not necessarily a good thing because although sucralose is derived from real sugar, it's not natural as it has undergone a multi-step patented chemical process whereby sucrose has been chemically modified by replacing three hydrogen-oxygen groups with three chlorine atoms. This will result in boosting the sweetening power, this is why it's so much sweeter than table sugar. Some people use it as a sugar substitute as it's non-caloric but is it healthy after all? Sucralose makes your pre workout drink more palatable, this is why it's added but it's questionable for health as to its long term use effects.

Some side effects of sucralose include

Put you at risk of digestive issues
Change insulin and glucose levels
Kills good bacteria
Weakens gut health and impairs the GI tract
Can produce toxic compounds when heated
May be carcinogenic

This is why nowadays you have pre workout supplements without sucralose for those who are health-conscious. Instead, natural sweeteners like stevia, erythritol, xylitol and luo han guo are used or no sweetener at all. Stevia is actually a herb and the sweetener is extracted from its leaves whereas erythritol is obtained by fermenting corn's natural sugar and xylitol a naturally occurring sugar alcohol found in many fruits and vegetables and fibrous plant material like sugarcane bagasse or corn husks. As for luo han guo, it's an exotic fruit also known as monk fruit. These are some of the best natural sugar substitutes as far as health is concerned.

Below is my list of the top 11 pre workout without artificial sweeteners like sucralose:

(1) The Genius Brand, Genius Pre, Grape Limeade, 11.92 oz (338 g) - contains natural flavors, organic stevia leaf extract, beet root powder, a clinical dose of 6 grams of L-Citrulline Malate 2:1 per 1 scoop

A really great all-natural, stim-free, nootropics based pre workout with scientifically proven clean ingredients. Experience better muscle pumps, faster recovery, better focus and endurance and improved strength.

Focus Without Caffeine
No Artificial Flavors, Colors or Dyes
Mind-To-Muscle Pre Workout Powerhouse
100% Naturally Flavored and Sweetened

The Genius Brand, Genius Pre, Grape Limeade, 11.92 oz (338 g)

(2) TypeZero, Clean Pre Workout, Fruit Punch, 11.3 oz (319 g) - contains stevia

At a whopping 5 grams of L-Citrulline Malate 2:1 per serving, this all natural pre workout recently gained my attention. If you want a high-quality pre workout which delivers, TypeZero is a must try. Also contains 2 grams of Arginine AKG 2:1, 1.5 grams of Betaine Anhydrous, 1 gram of Beet Root Extract (2% Nitrate), 600 mg of Apple Cider Vinegar Extract, 500 mg of N-Acetyl L-Tyrosine, 400 mg of Beta-Alanine, 200 mg of Organic Caffeine, 5 mg of Bioperine® (Black Pepper (Fruit) Extract), 500 mg of Vitamin C (as Ascorbic Acid) and 1 gram of GABA. GABA also known as Gamma-Aminobutyric Acid has been shown to boost the release of your body's growth hormones and increased growth hormone levels can have a major impact on muscle building and fat loss. In addition, TypeZero is free from artificial sweeteners and use stevia as natural sweetener. Other ingredients include Beet root powder (for color), natural flavors, calcium silicate and silica.

TypeZero, Clean Pre Workout, Fruit Punch, 11.3 oz (319 g)

(3) RSP Nutrition, AminoLean Max Pre-Workout Energy, Strawberry Lemonade, 9.85 oz (279 g) - contains stevia

Premium pump performance & matrix with 1.6 grams of Beta Alanine and 1.5 grams of Nitrosigine® for peak performance. Promote muscle strength and endurance as well as boosting nitric oxide production for increased blood flow and muscle pumps.

Clean Energy & Nootropic Focus Matrix with natural caffeine from green coffee beans along with brain boosting nutrients to improve mind-to-muscle connection.

Complete EAA + BCAA matrix with BCAA 2:1:1 (Instantized) 1.5 grams. High-quality, vegan, fermented EAA + BCAA blend will provide the energy needed to attain peak performance and promote faster recovery.

Naturally sweetened with stevia and also contains natural flavors and beet root powder.

RSP Nutrition, AminoLean Max Pre-Workout Energy, Strawberry Lemonade, 9.85 oz (279 g)

(4) Bluebonnet Nutrition, Pre Workout, Lemon, 0.66 lbs (300 g) - contains stevia extract and erythritol

Energy Blend with beta-alanine, caffeine anhydrous, L-taurine, and L-tyrosine, green tea leaf extract, cocoa bean extract totalling 1.325 grams.

Muscle Pump Blend with creatine monohydrate, L-leucine, L-isoleucine and L-valine, creatine malate, disodium phosphate totalling 2 grams.

Nitric Oxide Blend with L-arginine, L-arginine alpha ketoglutarate, L-citrulline malate, and L-lysine HCl totalling 1.12 grams.

Naturally sweetened with stevia extract, erythritol and 2 grams of added sugars and also naturally flavored.

Bluebonnet Nutrition, Pre Workout, Lemon, 0.66 lbs (300 g)

(5) Twinlab, Sport Preworkout, Caffeine Free, Sour Strawberry, 10 oz (287.5 g) - contains stevia leaf extract

CarnoSyn® Beta Alanine 2.4 g.

L-Citrulline 1.5 g.

Rhodiola Root Extract 170 mg.

S7™ Blend with Green Coffee Bean Extract, Green Tea Leaf Extract, Turmeric Root Extract, Sour Cherry Fruit Powder, Blueberry Fruit Powder, Broccoli Head Powder, Collards Leaf Powder.

Naturally sweetened with stevia leaf extract, fructose and 5 grams of added sugar. Also contains natural flavors and annatto seed powder.

Twinlab, Sport Preworkout, Caffeine Free, Sour Strawberry, 10 oz (287.5 g)

(6) MRM, Driven, Pre-Workout Boost, Strawberry Kiwi, 12.3 oz (350 g) - contains stevia and monk fruit extract

Good pre-workout with natural strawberry-kiwi flavor, stevia leaf extract, monk fruit extract, red beet powder. Increase energy, stamina and endurance.

Hydration Blend - 4,200 mg consisting of Trehalose 3,100 mg, Betaine Anhydrous 625 mg, N-Acetyl-L-Cysteine (NAC) 375 mg, Pine Bark Extract (95% Proanthocyanidins) 100 mg.

Muscle Blend - 3,750 mg consisting of Arginine Alpha Keto-Glutarate 1,125 mg, Creatine Monohydrate 1,125 mg, CarnoSyn® Beta-Alanine 1000 mg, Citrulline Malate 500 mg.

Energy Blend - 1,225 mg consisting of Acetyl-L-Carnitine Hydrochloride 500 mg, N-Acetyl-Tyrosine 375 mg, Schizandra Berry Extract (2% Schizandrins) 193 mg, InnovaTea® Natural Caffeine (from Tea)(yielding 125 mg Caffeine) 132 mg, Peak ATP® 25 mg.

MRM, Driven, Pre-Workout Boost, Strawberry Kiwi, 12.3 oz (350 g)

(7) Garden of Life, Sport, Organic Plant-Based Energy + Focus, Pre-Workout, Blackberry Cherry, 8.1 oz (231 g) - contains organic stevia leaf extract and organic erythritol

Garden of Life, Sport, Organic Plant-Based Energy + Focus, Pre-Workout, Blackberry Cherry, 8.1 oz (231 g)

(8) MRM, Organic Pre-Workout, Island Fusion, 8.5 oz (240 g) - contains organic stevia leaf extract and organic monk fruit extract

MRM, Organic Pre-Workout, Island Fusion, 8.5 oz (240 g)

(9) Zhou Nutrition, Lite Up, Non-Stimulant Pre-Workout, Berry Lemonade, 7.5 oz (213 g) - contains stevia leaf extract and natural mixed berry lemon flavor

Zhou Nutrition, Lite Up, Non-Stimulant Pre-Workout, Berry Lemonade, 7.5 oz (213 g)

(10) EVLution Nutrition, BeetMode, Concentrated Beet Crystal, Black Cherry, 6.9 oz (195 g) - contains stevia

Non-GMO Beet Root Powder(4 grams), Organic Fermented Beet Root Powder(1 gram), Malic Acid, Natural Flavor, Stevia Leaf Extract. This is a great natural pre-workout made from concentrated beet crystals to enhance performance, boost nitric oxide levels and increase endurance. Beets are an excellent vegetable as they are loaded with valuable nutrients like vitamins, minerals and nitrates which offer numerous health benefits. This cutting-edge pre workout promotes healthy nitric oxide levels thanks to the high nitrate content in beets thereby ensuring effective oxygen uptake and blood flow to your muscles which helps improve exercise endurance, boost energy levels without the jitters, reduce fatigue and foster athletic performance.

EVLution Nutrition, BeetMode, Concentrated Beet Crystal, Black Cherry, 6.9 oz (195 g)

(11) Onnit, Total Nitric Oxide, with Citrulline, Arginine & Beet, Harvest Fruit, 8.32 oz (236 g) - contains organic stevia

Proprietary Blend

Fermented Beet Root, OxyPhyte® Grape Seed Extract, OxyPhyte® Apple Extract, Acerola Cherry Extract 5.87 g

L-Citrulline DL-Malate 3 g

Arginine Nitrate (as NO3-T®) 1.4 g

Careflow® Mango Fruit Powder 100 mg

Onnit, Total Nitric Oxide, with Citrulline, Arginine & Beet, Harvest Fruit, 8.32 oz (236 g)