Quick verdict
Both stores sell supplements online, both land in the middle of the pack in our reviews with real caveats, and both have all-sales-final refund policies. That is where the similarity ends. - Mars By GHC is a men's wellness store with flat, low prices: most single bottles are $29.99 and most two-product combos are $49.99. The catch is that many listings do not disclose ingredient amounts, and the marketing is aggressive. - NuVision Health Center, the slightly safer pick of the two, is the online shop of a wellness practice founded by Dr. Nick Zyrowski. It resells practitioner-line brands such as Xymogen, Celarity and Alimentum Labs, mostly at $25 to $60 a bottle, and several listings carry third-party certifications. Our pick for most buyers is NuVision, because you can see what you are getting: doses on key products, NSF Certified for Sport creatine, IFOS five-star fish oil. Mars makes sense only if you specifically want its shilajit, nitric oxide or biotin chew formulas at a flat $30 and accept that you cannot compare doses. Whichever you choose, talk to your doctor first, and buy one bottle before committing to a stack or pack, because neither store takes change-of-mind returns. ## At a glance
| | Mars By GHC | NuVision Health Center |
|---|---|---|
| Who runs it | TGHCO Support Services Private Limited (per shipping policy) | Wellness practice founded by Dr. Nick Zyrowski |
| Catalog | 1,200+ listings, mostly variants of a few dozen formulas | About 274 products from a short list of brands |
| Typical price | $29.99 single, $39.99 chews, $49.99 to $59.99 combos | $25 to $60 single, $119.97 packs, up to $377 programs |
| Dose transparency | Often not listed | Listed on key products; refund policy says ingredients are on every product |
| Discounts | Compare-at prices 3 to 4 times the selling price on nearly everything | Small, usually a few dollars |
| Returns | All sales final; damaged, wrong or lost orders reported within 14 days with photo or video | All sales final; damaged or defective items exchanged if reported within 7 days |
| Shipping | 2 to 3 day processing, 5 to 7 business day delivery, rates at checkout | Free over $150, free on $20+ auto-ship (continental US), 1 to 2 day processing |
| Coupon | Store-wide code available | No public code found |
What each store actually sells
Mars By GHC focuses on men's performance, drive, hair and weight management. The core formulas are a nitric oxide capsule with L-arginine, L-citrulline and adaptogens; a shilajit gold resin blended with ashwagandha and maca; a NAD+ capsule with resveratrol, TMG, quercetin and CoQ10; creatine monohydrate in capsules with shilajit; lion's mane capsules; and 10,000 mcg biotin chews. Most of the 1,200+ listings are those formulas paired into combos like the $59.99 Power Pack (shilajit plus ashwagandha). Some product names lean hard on marketing, so read the ingredient panel rather than the title. NuVision Health Center covers broader health goals for men and women: fish oil, vitamin D, probiotics, creatine, NAD+, and goal-based packs for daily essentials, liver support, blood pressure and weight loss. It also sells lab test kits and consultations, which Mars does not. The packs are $119.97 a month, or $317.97 with a consultation added. ## Same supplement, two stores
The clearest way to compare is to line up products both stores sell. Creatine. Mars Micronized Creatine Caps cost $29.99 for one bottle at 4 capsules a day, but creatine per serving is not listed, and common daily doses are several grams. NuVision's Celarity Creatine+ is $36.97 for 30 days of stick packs or $40.97 for a 90-day canister, with 5 g of creatine monohydrate per serving and NSF Certified for Sport status. The canister is the better value by a wide margin and the one tested athletes can use. NAD+. Mars NAD+ Capsules are $29.99 and blend LipoNAD with resveratrol, TMG, quercetin and CoQ10, but the listing frames it around sexual performance and gives no amounts. Celarity NAD+ at NuVision is $50.97 with nicotinamide riboside plus antioxidant co-ingredients; it does not state the NR dose either. Neither is a clear win, and longevity claims in this category are still being studied. Men's daily routine. Mars sells stacks built around drive and gym performance. NuVision's Men's Daily Essentials Vitamin Pack ($119.97) bundles a methylated multivitamin, D3 plus K2, a seven-strain probiotic and CoQ10 with omega-3 in daily packets. Doses for each component are not on that listing, so ask before buying. Fish oil. Only NuVision sells one worth naming: Xymogen Omega MonoPure 900 EC gives 900 mg of EPA plus DHA per softgel, is IFOS five-star certified, and costs $59.99 for a 90-day supply. ## Pricing: read past the badges
Mars shows a crossed-out compare-at price on 1,169 of 1,228 products, often $119.97 next to $29.99. Treat $29.99 as the real everyday price; it is in the normal range for branded men's supplements. Combos at $49.99 cost less than two $29.99 bottles, but only if you want both. NuVision's pricing is roughly list price for practitioner brands, with markdowns of a few dollars. The savings lever is shipping: auto-ship orders of $20 or more ship free to the continental US, and one-time orders ship free at $150. If you auto-ship, cancel at least 2 business days before the ship date, since a shipped order cannot be returned. ## Policies and safety
Both refund policies are strict, and policies are the weakest area for both stores in our reviews. Mars refunds or replaces damaged, wrong or undelivered orders reported within 14 days with photo or video evidence; its contact page describes a more generous refund for unopened items, which conflicts with the main policy, so assume the stricter version. NuVision only exchanges damaged or defective items for the same product, and only within 7 days. On safety, a few ingredients in these catalogs deserve a conversation with your doctor: high-dose biotin can skew thyroid and heart lab tests; vitamin K2 and fish oil can interact with blood thinners; ashwagandha is not advised in pregnancy or with some thyroid medications; and NuVision's 10,000 IU vitamin D is a high dose best taken after a blood test. Mars's claim that its products are safe for everyone with no side effects is not something any supplement can promise. ## Who should pick which
Pick NuVision Health Center if you want third-party-tested basics (creatine, fish oil), practitioner brands, women's or general health products, or a done-for-you monthly pack, and you will use auto-ship. Pick Mars By GHC if you are a man who specifically wants shilajit resin, a nitric oxide capsule or a biotin chew at $30, and you are fine buying on ingredient lists without amounts. Skip both if you want to try a supplement with the option to send it back. Full details are in our Mars By GHC review and NuVision Health Center review.