Home Ingredients Flex Pro ES® (Joint Support Complex)
Joint Health

Flex Pro ES® (Joint Support Complex)

Evidence Level
Limited
0 Clinical Trials
3 Documented Benefits
2/5 Evidence Score

Flex Pro ES® is a joint-support complex that combines water-soluble eggshell membrane, hyaluronic acid, astaxanthin, and boswellia. Together they supply joint building blocks, support joint lubrication, and help support a healthy inflammatory response. Published data for the specific finished blend are limited, though its components are individually studied.

Studied Dose One capsule with food, per the product.
Active Compound Blend of eggshell membrane, hyaluronic acid, astaxanthin, and Boswellia serrata.

Benefits

Joint comfort and cartilage

Eggshell membrane and boswellia are studied for supporting joint comfort, while the blend supplies elastin, collagen, and glycosaminoglycan building blocks for cartilage.

Joint lubrication

Hyaluronic acid supports the cushioning, lubricating quality of joint fluid.

Anti-inflammatory and antioxidant support

Boswellia helps support a healthy inflammatory response while astaxanthin adds antioxidant protection.

Mechanism of action

1

Connective-tissue building blocks

Eggshell membrane provides collagen, elastin, and glycosaminoglycans used to maintain cartilage and connective tissue.

2

Anti-inflammatory and lubrication support

Boswellia inhibits the 5-LOX inflammatory pathway, hyaluronic acid supports joint fluid, and astaxanthin protects against oxidative stress.

Clinical trials

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
Contains egg; avoid if you have an egg allergy.
Mild digestive upset is occasionally reported.

Important Drug interactions

Anticoagulants — some components may have a mild additive effect; monitor.
Tell your doctor about all supplements if you take medication.
Use caution if pregnant or breastfeeding.

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Frequently asked questions about Flex Pro ES® (Joint Support Complex)

What is Flex Pro ES?

Flex Pro ES® is a joint-support complex that combines water-soluble eggshell membrane, hyaluronic acid, astaxanthin, and boswellia. Together they supply joint building blocks, support joint lubrication, and help support a healthy inflammatory response.

What is Flex Pro ES used for?

Flex Pro ES is researched primarily for Joint Health. Eggshell membrane and boswellia are studied for supporting joint comfort, while the blend supplies elastin, collagen, and glycosaminoglycan building blocks for cartilage.

What is the recommended dosage of Flex Pro ES?

The clinically studied dose is One capsule with food, per the product. Always follow the product label and check with a healthcare provider for personal advice.

Is Flex Pro ES safe, and does it have side effects?

For most healthy adults, Flex Pro ES is well tolerated at studied doses. Reported effects can include: Generally well-tolerated. Contains egg; avoid if you have an egg allergy. It may also interact with some medications. Flex Pro ES is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Flex Pro ES interact with any medications?

Possible interactions include: Anticoagulants — some components may have a mild additive effect; monitor. Tell your doctor about all supplements if you take medication. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Flex Pro ES?

NutraSmarts rates the evidence for Flex Pro ES as Limited (2 out of 5). It is backed by 4 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(4 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Ruff KJ, Winkler A, Jackson RW, DeVore DP, Ritz BW Eggshell membrane in the treatment of pain and stiffness from osteoarthritis of the knee: a randomized, multicenter, double-blind, placebo-controlled clinical study Clinical Rheumatology. 2009;28(8):907-14. doi:10.1007/s10067-009-1173-4.PubMedUsed to support: Multicenter double-blind RCT showing water-soluble eggshell membrane (a key Flex Pro ES component) reduced knee OA pain and stiffness vs. placebo, supporting joint comfort and cartilage benefit. Note: evidence is for eggshell membrane component, not the full Flex Pro ES blend.
  2. Ruff KJ, Morrison D, Duncan SA, Back M, Aydogan C, Theodosakis J Beneficial effects of natural eggshell membrane versus placebo in exercise-induced joint pain, stiffness, and cartilage turnover in healthy, postmenopausal women Clinical Interventions in Aging. 2018;13:285-295. doi:10.2147/CIA.S153782.PubMedUsed to support: RCT in healthy postmenopausal women showing 500 mg/day eggshell membrane reduced exercise-induced cartilage degradation (CTX-II biomarker) and improved joint pain and stiffness recovery, supporting joint comfort and cartilage benefit. Note: evidence is for eggshell membrane component, not the full blend.
  3. Hill WS, Dohnalek MH, Ha Y, Kim SJ, Jung JC, Kang SB A Multicenter, Randomized, Double-Blinded, Placebo-Controlled Clinical Trial to Evaluate the Efficacy and Safety of a Krill Oil, Astaxanthin, and Oral Hyaluronic Acid Complex on Joint Health in People with Mild Osteoarthritis Nutrients. 2023;15(17):3769. doi:10.3390/nu15173769.PubMedUsed to support: Multicenter double-blind RCT showing an oral krill oil, astaxanthin, and hyaluronic acid complex (a krill-containing formula that is a different finished blend from Flex Pro ES, though it shares the astaxanthin and hyaluronic acid components) significantly reduced VAS pain scores and improved joint function vs. placebo in mild OA, supporting joint lubrication and anti-inflammatory/antioxidant benefit. Note: combination-product trial on a krill-based blend, not Flex Pro ES; individual component contributions (including the krill oil, which Flex Pro ES does not contain) were not isolated.
  4. Sengupta K, Alluri KV, Satish AR, Mishra S, Golakoti T, Sarma KV, Dey D, Raychaudhuri SP A double blind, randomized, placebo controlled study of the efficacy and safety of 5-Loxin for treatment of osteoarthritis of the knee Arthritis Research & Therapy. 2008;10(4):R85. doi:10.1186/ar2461.PubMedUsed to support: Double-blind RCT demonstrating a boswellia (AKBA-enriched) extract significantly reduced knee OA pain and improved physical function vs. placebo, supporting the anti-inflammatory benefit attributed to the boswellia component of Flex Pro ES. Note: evidence is for the boswellia component, not the full blend.