R1 Lean5 Review: Is This Fat Burner Effective?

Written by James C., M.S.(C), PT

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BroScience Verdict
Rule One Lean5 Fat Burner

Lean5 is a fat burning supplement that contains five ingredients designed to help burn off more fat, the formula contains no proprietary blends

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R1 Lean5 is becoming a notable option for individuals seeking a stimulant-free weight management supplement. Marketed by Rule 1 Proteins, this product differentiates itself by excluding caffeine and similar stimulants that are commonly found in fat burner supplements. This makes it suitable for consumers who are sensitive to stimulants or prefer to avoid them due to personal preferences or health reasons. Instead, R1 Lean5 focuses on a blend of ingredients that are designed to support weight loss efforts without the inclusion of traditional stimulants.

The product offers a range of flavors, catering to those who prioritize taste in their supplement regimen. Popular options such as Blue Razz Lemonade and Strawberry Kiwi indicate the brand’s commitment to providing enjoyable flavors to enhance the user experience. Made to be versatile, R1 Lean5 appeals to both men and women with its inclusive formula. It is set at a competitive price point and is accessible through the Rule 1 website, among other retail platforms, making it

Overview of R1 Lean5

R1 Lean5 is a stimulant-free weight management supplement designed by Rule 1 Proteins, targeting individuals keen on supporting their weight loss efforts. Formulated without caffeine and other stimulants, it can be adopted by both men and women.

Key Components:

  • Stim-Free Support: The formula excludes caffeine for users sensitive to stimulants.
  • Green Tea Extract: Recognized for its potential in fat metabolism.
  • L-Carnitine: An amino acid that plays a role in energy production.

Consumers often choose R1 Lean5 for its straightforward ingredient profile geared towards sustaining weight loss without the jitters typically associated with stimulant-laced fat burners. The user feedback is somewhat split, with numerous reviews indicating satisfaction with the product’s performance, citing improved outcomes within a short usage time.

Customer Sentiments:

  • Positive: Appreciation for its stimulant-free formulation.
  • Critical: Some ingredients are viewed as less effective for weight loss.

It should be noted that this product has a variety of mixed reviews. As with any dietary supplement, its effectiveness can vary from person to person.

R1 Lean5 packages are often sold with incentives such as price cuts or free shipping on sizable orders, making it an attractive option for bargain-seeking individuals committed to long-term supplementation. Those interested in purchasing the product may find deals that significantly lower the cost per serving, adding to its appeal.

Key Ingredients

Rule One Lean5 Review

R1 Lean5 is formulated with a variety of ingredients aimed at supporting fat loss and improving body composition. Each component has been selected for its potential role in the fat-burning process, without the inclusion of stimulants.


Conjugated Linoleic Acid (CLA) is touted for its ability to aid in the reduction of body fat. It’s a naturally occurring fatty acid that is found in meat and dairy products, and it’s included in R1 Lean5 with the intent to influence body composition positively.


L-Carnitine, particularly in the form of L-Carnitine L-Tartrate, is another key element. It plays a crucial role in the transport of fatty acids into the cells for energy production, which is essential for burning fat and can support exercise performance and recovery.

Garcinia Cambogia

Garcinia Cambogia extract is derived from a tropical fruit also known as Garcinia. It contains hydroxycitric acid (HCA), which has been researched for its potential to help reduce appetite and inhibit the production of fat.

Green Tea Extract

Green Tea Extract is rich in antioxidants, including catechins. One in particular, known as EGCG, has been studied for its ability to increase metabolic rate and enhance the burning of fat in the body.

Raspberry Ketones

Raspberry ketones are compounds that give raspberries their aroma, potentially supporting fat loss. They’re included in the formula with the belief that they can help break down fat more effectively within cells.

Flavors Offered

R1 Lean5 Review

R1 Lean5 is available in a variety of flavors, catering to different taste preferences. Each flavor is designed to provide a refreshing taste experience while supporting weight management goals.

Blue Razz Lemonade

The Blue Razz Lemonade flavor combines the tartness of blue raspberries with the classic sweetness of lemonade, creating a balance ideal for those seeking a tangy yet sweet drink.

Strawberry Kiwi

Strawberry Kiwi offers a fruity and vibrant taste, with the sweetness of strawberries and the slightly tart kick of kiwi fruit, making it a popular choice for a refreshing beverage.

Hawaiian Blast

With Hawaiian Blast, users can expect a tropical medley that invokes the feel of island-inspired refreshment, featuring a blend of exotic flavors reminiscent of a Hawaiian vacation.

Tropical Rush

Tropical Rush brings a burst of tropical flavors, promising a citrusy and refreshing experience with every sip, perfect for individuals who enjoy a sweet, fruit-forward palate.

Raspberry Iced Tea

The Raspberry Iced Tea flavor is for those who prefer a more traditional taste with a fruity twist, combining the robust flavor of iced tea with the sweet note of raspberries.

Usage Instructions

R1 Lean5 is a stimulant-free supplement that supports body composition goals. Adherence to the manufacturer’s guidelines is crucial for potential effectiveness and safety.

The user should take exactly one serving (one scoop) of R1 Lean5. Exceeding this amount does not increase benefits and is not advisable.

Consumption Timing

For optimal results, the supplement should be consumed on an empty stomach. This can be either first thing in the morning or in between meals to help sustain a consistent intake schedule.

Mixing with Cold Water

R1 Lean5 should be mixed with cold water to ensure palatability and refreshment. Cold water may also aid in the dissolution of the powder for a smoother beverage.

Benefits for Men and Women

R1 Lean5 Review

R1 Lean5 is a weight management product designed to support individuals who are targeting improvements in body composition. This applies to both men and women, as the supplement is stimulant-free and centers on fat loss without relying on caffeine or other typical stimulants that can cause jitters or disrupt sleep patterns.

For men, R1 Lean5 may aid in reducing body fat, which is often a primary goal alongside muscle gain. Ingredients such as Green Tea Extract and L-Carnitine are included, which have been associated with increased metabolic rates and the promotion of fat oxidation. Such features can potentially help men achieve a leaner physique.

Women may experience similar benefits in fat loss and body composition. The formula also contains CLA (Conjugated Linoleic Acid) and Garcinia Cambogia Extract, which have been researched for their roles in body fat management. These components can be part of a broader weight management regimen that includes diet and exercise.

  • For both genders, the aim of R1 Lean5 is to complement a healthy lifestyle and support fat loss goals.
  • The product is positioned as a supplement — an addition to, not a replacement for, balanced nutrition and regular physical activity.
  • The absence of stimulants makes it a versatile option for those who prefer to avoid such substances or who work out closer to bedtime.

While individual results can vary, and supplements may have different effects on different people, R1 Lean5’s combination of ingredients is designed to be a component of a comprehensive approach to body composition for both men and women.

Purchase Information

When considering purchasing R1 Lean5, customers can benefit from various options including free shipping and support. Understanding the ordering process and available customer support is crucial for a satisfactory purchase experience.

Free Shipping Options

For customers looking to save on delivery costs, Muscle & Strength offers free shipping on orders exceeding $99. Potential buyers should confirm if their total order qualifies for this option to take advantage of the savings.

Ordering Process

Orders for R1 Lean5 can be placed through multiple channels including the Rule 1 website, Muscle & Strength, and third-party retailers such as Amazon. The purchasing process typically involves selecting the desired flavor, quantity, and confirming payment through secure transaction methods.

Customer Support

In the event that a customer needs assistance with their purchase of R1 Lean5, they can reach out to customer service teams of the respective selling platform. Most vendors provide support through phone, email, or live chat to resolve any issues related to orders or inquiries.

BroScience Verdict
Rule One Lean5 Fat Burner

Lean5 is a fat burning supplement that contains five ingredients designed to help burn off more fat, the formula contains no proprietary blends

Buy Now Top 4 Alternatives

Frequently Asked Questions

In this section, readers will find concise answers to common queries regarding R1 Lean5, its benefits, and comparison with other Rule 1 protein products.

What are the benefits of taking R1 Lean5?

R1 Lean5 is designed to support weight management without the use of stimulants. It includes ingredients such as CLA, L-Carnitine, and Garcinia Cambogia, which may aid in fat loss.

How does Rule 1 protein support weight loss goals?

Rule 1 proteins, particularly R1 Lean5, provide a stimulant-free formula that may enhance weight loss efforts through the use of fat-burning ingredients and support for lean muscle maintenance.

What is the difference between R1 Isolate and R1 Whey proteins?

R1 Isolate is a protein that provides a purer form of whey isolate, which is lower in fat and carbohydrates. In contrast, R1 Whey blends different forms of whey protein which may contain slightly higher levels of fats and carbohydrates.

What flavors of Rule 1 protein are considered the best tasting?

Flavor preferences are subjective, but Blue Razz Lemonade has been received positively for taste among Rule 1 protein offerings.

How does the price of R1 protein compare to other brands in the market?

R1 Lean5 is competitively priced at $29.99 on Rule 1’s website, which is considered affordable when compared to similar fat burner supplements on the market.

What should consumers expect from the R1 Creatine supplement in terms of performance?

The R1 Creatine supplement is intended to support increased muscle strength and power. Users can expect enhanced performance during high-intensity training.

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