Optimum Nutrition
THE BIOHACKING STANDARD
Welcome to our store
Couldn't load pickup availability
Everything Vyvata knows about this product — the score, the evidence, the FAQ, and where else to find shopper reviews. No hidden data. Every vendor is scored on the same published rubric — no brand can pay for placement. Read the rubric →
Muscle Faktor's Polar Flex is a topical menthol cooling gel (menthol crystals, arnica flower, aloe leaf juice, witch hazel, botanical essential oils) marketed for post-activity skin comfort. This is a topical cosmetic product, not an oral supplement — outside Vyvata's biohacking-supplement scope. Menthol as a topical counterirritant has legitimate short-term local analgesic effect via TRPM8 activation; arnica has mixed topical evidence for bruising and post-activity soreness. As a cosmetic gel, the product is likely well-formulated and reasonably safe, but it does not fit the supplement category the platform is designed to evaluate. Auto-fail under out_of_scope_for_biohacking (topical/cosmetic).
The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.
Product-specific evidence citations for this item are embedded in the analysis text on the "Analysis" tab. For the full framework and evidence hierarchy, see the methodology page.
FAQ data has not been generated for this product yet. See the site FAQ for general questions.
The Vyvata score measures product integrity against a published rubric, not customer sentiment. Vyvata does not aggregate, republish, or license third-party reviews — the links below open search pages on their respective platforms.
Every VSF-related metafield surfaced verbatim. Nothing hidden. If you spot data that looks wrong, let us know.
Every score is set from the published rubric, audit-logged, and rescored whenever new evidence emerges (published trials, updated labels, third-party testing releases). Every vendor is scored on the same criteria — no pay-to-play. See our editorial-independence disclosure for the full policy, including brands with an editorial relationship to this site.

Optimum Nutrition
Onnit
WOW MD LLC
Prevagen
Find Your Protocol
A few quick questions about your goals and current concerns. We'll build a tailored protocol — a Basics list of essentials plus a comprehensive Biohackers list — across all Vyvata categories.
No signup required · Your protocol is private to you