Fast Flex Reviews

Joint Health Magazine is supported by our readers. When you buy something through a link on this page, we may earn an affiliate commission. See our Advertiser Disclosure.

This Joint Health Magazine content has been reviewed, as well as checked for facts, so as to guarantee the best possible accuracy.

We follow a strict editorial policy, especially related to the sources we use. Our articles are resourced from reputable online pages, with research drawn from academic institutions and peer-reviewed studies. You can click on the numbers in the parentheses (1, 2, etc.) and check out those references.

Medical Disclaimer: This product/supplement review is not intended to provide diagnosis, treatment, or medical advice. Please consult with a physician or other healthcare professional regarding any medical or health-related diagnosis or treatment options.

Joint Health Magazine does not assume liability for any actions undertaken after visiting these pages and does not assume liability if one misuses supplements. and its Editors do not ensure that unforeseen side effects will not occur even at the proper dosages, and thereby does not assume liability for any side effects from supplements or practices hosted under the domain of

We invite you to contact us regarding any inaccuracies, information that is out of date, or any otherwise dubious content that you find on our sites via our feedback form.

Melissa Feldman

What is Fast Flex

Fast Flex is manufactured by the well-known and generally trusted company GNC. The information available for Fast Flex on the official website is fairly limited, just covering the basics of the product, outlining the ingredients used and what they do.

Fast Flex is designed to provide ‘total joint health’ for damaged, worn and unprotected joints while also relieving the pain, stiffness and inflammation associated with an aging body. It may also aid in relieving the symptoms caused by certain other joint conditions including arthritis, osteoarthritis, fibromyalgia and gout.

The official website features suggestions for complementary products and has a section containing a written endorsement of the Fast Flex product by one of the company medical consultants, the neurosurgeon Dr. Joseph Maroon.

The product can be purchased directly from the GNC site but is also available in independent retail stores. Unfortunately there are no customer reviews of Fast Flex on the GNC webpage, nor are there anywhere else on the internet. However, there do not appear to be any complaints about the product either, and most people would feel very secure ordering a product from a company such as GNC.

What are the Ingredients Used in Fast Flex

Fast Flex

Fast Flex is a product that is used to ‘kick-start’ joint repair and health. It is recommended that this product is taken for approximately 8 weeks before switching to another GNC manufactured product, Tri Flex (the company advises consulting with a doctor first). Fast Flex covers all areas of joint rejuvenation, including rebuilding and repairing existing damage using Chondroitin and Glucosamine.


*All individuals are unique. Your results can and will vary.

Both commonly-used, proven joint supplements, these substances boost each other’s joint repairing ability and provide the ‘building blocks’ needed to strengthen the cartilage that covers and protects the end of bones. In addition to this Fast Flex also uses White Willow Bark, a natural substance that acts as a powerful anti-inflammatory, MSM, an organic sulfar, and Omega-3 rich fish oil, to lubricate and provide ease of movement in the joint.

All the ingredients used in Fast Flex are deemed to be safe and should produce no ill side effects, although it must be noted that Glucosamine and Chondroitin, which in this product is sourced from shrimp, are not suitable for anyone with a shellfish allergy. While GNC states that the ingredient amounts are at full potency the actual ingredient list is not provided.

GNC has made Fast Flex easy to take, providing each dosage in single packets. Each active ingredient is contained in a separate capsule, meaning that 5 capsules are taken per serving, a number which might be off-putting to some consumers.

What are the Pros of Fast Flex

  • Might improve joint health
  • May improve joint mobility and flexibility
  • Could provide relief from joint inflammation
  • It contains all-natural ingredients

What are the Cons of Fast Flex

  • The information for Fast Flex is limited
  • The ingredient amounts are not listed
  • There are several different capsules required per day
  • No customer testimonials are provided
  • No free samples or trial period is offered
  • The product cannot be used by anyone with shellfish allergies

Fast Flex Review – The Conclusion

Most people would choose this brand over another product containing similar ingredients, simply because GNC is a name they can trust and it doesn’t require long-term use. Although Fast Flex has several capsules per dosage, the Tri Flex follow-up product is much simpler and more convenient to take.

Providing no allergies, Fast Flex provides a good, all-round joint treatment that includes all the necessary ingredients required by damaged, inflamed joints.

Although the product seems promising, it has very limited information available online. Why would anyone want to buy such an obscure product? There are several options available in the market. Go for a product which is manufactured by a credible company and has full-fledged information available online.


*All individuals are unique. Your results can and will vary.

Bones are connected by joints, which allow us to move with ease. Joint damage can cause pain preventing you from doing the things you once loved. Many conditions lead to joint pain from aging to an untreated sports injury. A quality joint product may help repair existing tissue damage and also promote stronger joints, less susceptible to future degeneration.

Below you’ll find some of the most effective joint pain supplements on the market today, in our opinion.

Rating Table

Our Top Joint Pain Relief Products


Projoint Plus

Projoint Plus Overall rating 4.9/5 Overall rating Read Full Review
  • Reduce Joint Pain & StiffnessReduce Joint Pain & Stiffness
  • Supports Cartilage HealthSupports Cartilage Health
  • Maximizes Comfort & FlexibilityMaximizes Comfort & Flexibility
  • Quality Natural IngredientsQuality Natural Ingredients


  • Support Flexible Joints
  • Supports Cartilage Health
  • Supports Natural Joint Mobility
  • Non-GMO, Vegan, & Gluten-free


  • It can only be purchased online
  • People with seafood allergies can’t use this product
Bottom Line

ProJoint Plus supplement is worth considering based on the available information, as it ensures joint mobility levels are improved and restored. The potent ProJoint formula includes powerful proven, quality ingredients in their optimal amounts, including the powerful, backed pairing of Glucosamine & Chondroitin, and there have never been any reports of harmful side effects from customers.

Check Price

Joint N-11

Joint N-11 Overall rating 4.8/5 Overall rating Read Full Review
  • Supports Joint FlexibilitySupports Joint Flexibility
  • Strengthens Joint MobilityStrengthens Joint Mobility
  • Doctor FormulatedDoctor Formulated
  • Purely Natural IngredientsPurely Natural Ingredients


  • Relieve Pain and Aches
  • Support Joint Health
  • Improve Joint Stiffness
  • Improve Muscle Strength


  • Only available online.
  • May react with other medications.
Bottom Line

Joint N-11 is an all-natural dietary formula that works to alleviate pain and inflammation. This cutting-edge formula delivers pure Niacinamide, which is clinically shown to help protect joint tissue.

Check Price

1MD MoveMD

1MD MoveMD Overall rating 4.7/5 Overall rating Read Full Review
  • Promotes Joint MobilityPromotes Joint Mobility
  • Promotes Joint FlexibilityPromotes Joint Flexibility
  • Aids Proper Joint FunctionAids Proper Joint Function
  • Lab-Tested IngredientsLab-Tested Ingredients


  • Doctor Formulated
  • Supports Joint Comfort
  • Ability To Lubricate Joints
  • Ease Joint Discomfort


  • Only available online.
Bottom Line

1MD MoveMD delivers clinically studied ingredients in one revolutionary joint health solution to help reduce joint discomfort in as few as 7 to 14 days. It uses lab-tested and proven ingredients and is suitable for both genders of all ages.

Check Price

Read All Fast Flex Customer Reviews

Fast Flex Reviews
3.6 / 5.0
Fast Flex Reviewer Rating
Review this Product
Write a Review
Fast Flex Reviews
  1. Krystin D.

    Taste is so bad
    The first pack was great and it really works, but the second one had a larger, yellow pill that had a rotten taste to it. I wrote the company and they said they were concerned, but didn’t refund my money or even get back to me. Don’t buy this product. I can’t bear to swallow it because the taste is so bad.
Review Guidelines ?

Hints on how to write a helpful review

A great review should have the following qualities:

  • A helpful review should connect and engage with the readers using personal experience.
  • An excellent review provides the readers with cogent and unbiased information necessary to help them make the best choice.
  • A review must be well-formatted to make reading easier by using multiple paragraphs and avoiding caps.
  • The primary goal of your review must remain to provide accurate and non-salesy information.
  • Above all, let your review be fair and honest.

We have high level of professional editorial section with zero tolerance policy on fake reviews.

To maintain the genuineness of our brand, we ensure all customer reviews submitted to us are verified and confirmed before publishing. Though we might not be a 100% accurate, however, we try our best to ensure being next to best. For a thorough verification of submitted reviews, we spend close to 7 working days before allowing any customer review to be published since we also work on the earliest submissions first.

Your email address will not be published.


Privacy Policy
Submitting this review means that you agree to our Review Guidelines, confirming that you are a verified customer who has purchased the product and may have used the merchandise or experienced the service, and providing only a real interaction and experience without ulterior motives or has an affiliate or business with the company in any way. By ticking this box and submitting this review, you also accept that submitting fake reviews is a violation of Joint Health Magazine Terms of Use and such conduct will not be tolerated.

5000 characters remaining.

Thanks for submitting your comment!

**This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

*Result may vary. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. The information contained in this website is provided for general informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease and should not be relied upon as a medical advice. Always consult your doctor before using any supplements.

Disclosure of Material connection: Some of the links in the post above are “associate sales links.” This means if you can click on the link and purchase an item, we will receive a commission. Regardless, we only recommend products or services which we use personally and/or believe will add value to our readers. We are disclosing this in accordance with the Federal Trade Commission's 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials.”