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Performance Lab Flex









  • High quality ingredients
  • Synergy
  • Science backed


  • Clinical doses need more than one serving.
  • Only available at their website

Performance Lab Flex FAQ

  • One Container: 30 servings
  • Price: $35.00
  • Serving Size: 2 NutriCaps
  • Serving Suggestion: Take 2 capsules daily. For additional soothing joint support take 2 capsules immediately after physical activity. For best results, use daily and consistently.
  • Refund Policy: If you’ve ordered something by mistake or changed your mind, then returning unused and unwanted items is easy. Simply contact their friendly customer support team here within 7 days of receiving your order. They will give you the appropriate address, and detailed instructions on how to return your item(s) to them. You will have to pay for return postage and when they get the items back, they will issue you a refund, less their shipping costs.

No matter how careful you are or if you always make sure to do proper recovery exercises and nutrition, there’s always a good chance that you can hurt your joints and the muscles around them.

Whether in exercise or simply lifting a piece of furniture the wrong way, joint pain is something a lot of people normally experience.

Performance Lab Flex is claimed to be a flexibility enhancer, offer joint-pain relief, and have anti-inflammatory benefits delivered in the cleanest and purest way possible.

Can they back what their supplement claims to do? Can you actually find joint-pain relief when you take it? Read our review to find out.

Who Makes It?

Flex is sold by Performance Lab. Performance Lab is known to design and sell some of the best nootropics in the industry today. Their notable product is the brain-booster Performance Lab Mind.

Marketing Claims Made

The following claims were made about Performance Lab Flex:

  • Ultramodern joint nutrients. The ingredients used are all in their branded and premium forms. These forms help for better bioavailability.
  • Soothes and protects achy joints. Half of the ingredients are studied for their anti-inflammatory benefits, a trait that influences joint pain recovery.
  • Vegan formula. Most of the ingredients are normally sourced from animals. However, Performance Lab Flex made sure they invested in plant-based sources.

What’s in it?

Now, let’s take a closer look at what’s inside Performance Lab Flex:

  • CurcuWIN Turmeric (Curcuma longa) (root) (20%Curcuminoids): Turmeric is best described as that yellow-colored spice everyone puts in curry. It’s also quite a popular ayurvedic spice known to exhibit scientifically recognized therapeutic properties. It’s known to have anti-inflammatory, antibacterial, and cardiovascular benefits especially for LDL-cholesterol and blood sugar. These are all due to its active compound curcumin. Taking curcumin supplements has been shown to reduce markers of inflammation and increases the levels of endogenous antioxidants in the body. A reduction in LDL-cholesterol, blood glucose, and blood pressure is also possible with daily consumption. [1]
    • Patients with osteoarthritis showed improvement in pain, physical function, and quality of life after taking curcumin. They also reported reduced concomitant usage of analgesics and side effects during treatment…Curcumin, a NF-κB suppressor, demonstrates potential as a treatment agent for osteoarthritis, a disease with an underlying inflammatory cause. Its efficacy in reducing pain, physical function, and quality of life among osteoarthritic patients has been demonstrated in many clinical trials. The effects of curcumin on osteoarthritis can be attributed to its ability to prevent apoptosis of chondrocytes due to inflammation predominantly, and oxidative stress to a lesser extent.
  • ApresFlex Boswellia serrata (gum resin) (20% 3-O-acetyl-11-keto-beta-boswellic acid [AKBA]): Boswellia serrata is yet another ayurvedic herb known to possess anti-inflammatory properties, especially when it comes to treating symptoms of osteoarthritis. Oral supplementation can also help with pain management and immobility associated with joint pains if taken continuously for at least a week. [2]
    • The present animal study has revealed that the BSE has anti-inflammatory potential and can be used as an antiarthritic drug…A higher dose of BSE was more effective than its lower dose by showing improvement in the body weight, reduction of the paw thickness, reduction of the ankle diameter, reduction of the paw volume, reduction of the arthritic index for acute inflammation in rheumatoid arthritis.
  • Glucosamine Sulfate 2KCL (from corn): Glucosamine is a supplement extracted from shellfish, but vegan sources such as corn is slowly gaining popularity. This compound is known to provide some form of pain relief when it comes to inflammatory diseases. Many studies show supplementing glucosamine sulfate reduces collagen degradation (joint tissue) as well as symptoms of osteoarthritis. It’s also been compared to drugs meant to target joint pains, but just not as potent. [3]
    • Given the effectiveness of these symptomatic slow-acting drugs, oral chondroitin is more effective than placebo on relieving pain and improving physical function. Glucosamine showed effect on stiffness outcome. Regarding on the limited number of combination therapy, further studies need to investigate the accurate effectiveness. This information accompanied with the tolerability and economic costs of included treatments would be conducive to making decisions for clinicians.
  • Mythocondro (Chondroitin Sulfate [vegan]): Chondroitin is a popular anti-inflammatory supplement often paired with glucosamine as a treatment for joint pains and stiffness. [4]
    • Arthritis patients treated with celecoxib exhibited significant improvement in osteoarthritis knee pain. Chondroitin sulfate treated patients demonstrated a statistically significant improvement in joint swelling compared to placebo treated arthritis patients.
  • OptiMSM (Methylsulfonylmethane [MSM]: MSM is a naturally occurring substance in green vegetables and other food products including milk, and chicken liver. Like glucosamine and chondroitin, MSM is also studied for its joint-pain benefits. However, the evidence around this compound is not as strong or solid as the two previously mentioned ingredients. [5]
    • Three weeks of MSM supplementation at 3g/day attenuated post-exercise muscle and joint pain at clinically significant levels compared to placebo.
  • NutriGenesis Strontium: This is actually a mineral that is mainly found in our bones. And because it is largely found in our bones, most of the studies about its health benefits focus on bone-related illnesses and conditions particularly osteoporosis and even bone cancer. [6]
    • “Indeed, strontium was found to exert several effects on bone cells. In addition to its antiresorptive activity, strontium was found to have anabolic activity in bone, and this may have significant beneficial effects on bone balance in normal and osteopenic animals. Accordingly, strontium has been thought to have potential interest in the treatment of osteoporosis.

Supplement Facts Label

Performance Lab Flex Supplement Facts Label


People who have chronic joint pains and perhaps many conditions related to inflammation can potentially benefit from taking Flex. It has the necessary clinical compounds studied for joint pains, bone diseases, and even muscle injuries.

Other than pain relief and a faster recovery, the ingredients in Flex can also potentially help in improving joint health as well as having protective effects against inflammatory diseases.

Turmeric, in particular, can also exhibit benefits outside of joint pain and inflammation. It can also help protect users from tissue oxidation and even cardiovascular health.


Fortunately, the dosages user per ingredient are nowhere near their toxicity levels. Not to mention that these ingredients were found to have no symptoms that would be a cause of concern.

However, they can always interact with specific medications. The curcumin in turmeric can boost the blood-thinning effects of aspirin which could cause users to bleed more than they should. Of course, women who are pregnant shouldn’t take curcumin.

We always recommend you speak with your doctor before taking any supplements featured on this site.

How to Take It

According to their website, Performance Lab Flex is suggested to be taken in a two capsule per day basis. For additional soothing joint support, they also recommend taking 2 capsules immediately after physical activity.

For best results, use daily and consistently.

They also suggest that Flex is helpful for both the exercising youth and older adults – because their supplement is designed to soothe age-related joint aches with botanicals that are easier on the gut.


It doesn’t really have a taste or flavor given that it’s in capsule form. The most you can expect would be the typical capsule taste.

Number of Servings

One bottle has 30 servings. One serving is 2 NutriCaps.

Top Alternative to This Product

Performance Lab Flex vs Life Extension Glucosamine Chondroitin

One of the best products to rival Flex is Life Extension’s Glucosamine/Chondroitin.

Unlike Flex, Life Extension’s G/C only has:

  • 400 mg Glucosamine sulfate (from 544 mg Glucosamine sulfate 2KCl)
  • 450 mg Chondroitin sulfate (from 500 mg Chondroitin sulfate sodium)

This stack is actually the basic joint-pain stack many studies are based on.

While the combination of chondroitin and glucosamine in studies about joint health is solid, you also have to consider their potential for long term health. In this case, Life Extension’s G/C comes out as a bit lacking in function.

Which one is better? It depends on two things: Function and Budget.

Function-wise, we think Flex is much, much better. The ingredients included aren’t all geared towards treating pain as much as they are for reducing their occurrence as you age. Flex was made with both young and old in mind.

Budget-wise, we have to go with Life Extension Glucosamine/Chondroitin. It’s only $25.00 per 100 capsules and is best suited for people with really aggressive joint pains aka older adults.

Customer Feedback

Most online reviews on Performance Lab Flex were positive. They insist that the supplement actually has science to back their claims with a relatively affordable cost compared to some competitors.

One nitpick is that you can only order from the official website, limiting logistics and payment options.

Have you tried this product? Leave a review below and let us know what you think!

Bottom Line

When it comes to joint pain relief and long-term wellness, we think Performance Lab Flex is a great brand to use. Science-backed ingredients, synergistic combinations, wide-range of users, it’s almost like this might be one of the best joint-pain supplements out there.

The only real downside is the fact that users who really have bad joint pains might need to take more than one serving per day, causing them to empty a full bottle faster than intended.

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Have you tried this product? Let us know how it is by leaving your own personal review below!

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