Health Deals Radar — May 17, 2026
Today's best confirmed deals on protein powder, vitamins, and fitness equipment across Costco, Amazon, iHerb, Vitacost, and Slickdeals — with historical-low context and promo-code stacking guide.
Today's best prices on protein powder, supplements, and fitness gear across Costco, Amazon, iHerb, Vitacost, and Slickdeals. All deals below are confirmed active as of this morning; expired listings are excluded.
| Item | Retailer | Sale price | Savings | Expires |
|---|---|---|---|---|
| Orgain Plant Protein 2lb | Amazon | $10.84–$13.94 | ~70% off | Not stated |
| Cellucor Creatine 50 srv | Amazon | $10.78 | 40% off MSRP | Not stated |
| Nature Valley Protein Bars 30ct | Costco in-warehouse | $9.99 | $5.00 (33%) | June 7 |
| CGN Instantized BCAA 2lb | iHerb | $20.47 | 56% off | While on sale |
| Merach Q1S Rowing Machine | Amazon | $139.99 | ~46% off regular | Not stated |
| Echelon Connect Sport 2 Bike | eBay (vipoutlet) | $130.50 | 67% off $398 retail | Not stated |
| Nature Made Vitamin D3 300ct | Amazon | $5.99 | 68% off MSRP | Select accounts |
| CGN Whey Protein Isolate 2lb | iHerb | $35.00 | 30% off | While on sale |
Protein powder and bars
Orgain Organic Protein 2lb — as low as $10.84 shipped (Amazon)
The strongest protein powder price in today's scan. Orgain Organic Plant Protein (Strawberries 'N Cream, 2.03 lb, ASIN B09SJ4WJNV) lists at $30.98, but two stackable digital coupons drop it sharply: a one-time-purchase 20%-off coupon plus a Subscribe & Save 30%-off coupon can be clipped together. 1
- With 5% S&S (base tier): $13.94 shipped (Prime)
- With 15% S&S (requires 5+ active S&S orders that month): $10.84 shipped (Prime)
- Chocolate Peanut Butter and Peanut Butter flavors (ASINs B0785G3W29 / B06W52PLFP) stack the same way for $11.03–$14.18 1
Note: CamelCamelCamel price history is not yet available for this ASIN, so an all-time-low confirmation is pending. Hip2Save notes coupons may vary by account ("offers may vary by account") — check your own listing before assuming the stack is available.
Cellucor Creatine Monohydrate 50 srv — $10.78 (Amazon, Popular badge)
Cellucor Cor-Performance Creatine, Watermelon, 11.1 oz / 50 servings, lists at $17.97. After a 35% clip-on coupon plus 5% Subscribe & Save the price lands at $10.78 shipped (Prime or $35+). 2
Slickdeals deal hunter Rokket (staff) confirmed the coupon still active on May 16. This exact price has appeared at least four times in 2026 (February, April 4, April 19, May 1), so it's not unusual — but it is one of the better per-serving rates for a recognizable creatine brand. Some accounts report the coupon unavailable; check before adding to cart.
California Gold Nutrition Sport Instantized BCAA 2lb — $20.47 at iHerb (56% off)
iHerb's (online vitamin and supplement retailer) deepest discount in the sports category today. CGN Instantized BCAA Powder, 2 lb, lists at $46.56 and is on sale for $20.47, a 56% reduction. 3 Over 300 units sold in the last 30 days. No promo code needed; BOGO 40% off is also active on iHerb-branded products (mix and match, no code). 4
CGN Sport Whey Protein Isolate, Dark Chocolate, 2 lb is at $35.00 (was $50.00, 30% off) with 4,000+ sold in the past 30 days, and the vegan protein line (2 lb, Vanilla / Chocolate / Cinnamon Bun) is at $32.55 (was $46.50, 30% off). 3 Free shipping on iHerb orders over $30.
Nature Valley Chewy Protein Bars 30ct — $9.99 at Costco (in-warehouse, through June 7)
Nature Valley Chewy Protein Bars (Peanut Butter Dark Chocolate, 1.42 oz each, 10g protein per bar, gluten-free) drop from $14.99 to $9.99 — a $5.00 savings (33%) — in the Costco May 2026 Member-Only Savings coupon book, valid May 11 through June 7, in-warehouse only. 56
Limit 10 per member. At $9.99 for 30 bars that works out to about $0.33 per bar for a 10g-protein snack, which is hard to beat at most grocery stores. Requires an active Costco membership.
PBfit No Bake Peanut Butter Protein Ball Mix 10.58oz — $3.70 (Amazon Frontpage)
After a 25% clip-on coupon plus 5% Subscribe & Save, PBfit's protein ball mix hits $3.68–$3.70 shipped (Prime or $35+) from its $5.25 listing price. 7 The Slickdeals Frontpage badge pushed it to +34 community score. Worth flagging: one community member who bought it previously noted it was harder to make than advertised and "did not taste very good," while another called it a great price to try something new. First-time buyers should take the S&S subscription knowing they can cancel after one delivery.
Vitamins and supplements
Nature Made Vitamin D3 1000 IU 300ct — $5.99 (Amazon, select accounts)
Nature Made (one of the largest US vitamin brands) Vitamin D3 1,000 IU (25 mcg) softgels, 300-count (a 300-day supply), drops to $5.99 via a 35% clip coupon plus 5% Subscribe & Save, from a $9.99 listing and a $19 MSRP. 8 Free shipping with Prime or $35+ order. Rated 4.8/5 from 55,000+ Amazon reviews.
This deal earned a Slickdeals Frontpage badge (+35 score, 19 comments, posted April 19). Community debate worth knowing: some members argue 1,000 IU is too low a dose, while others counter that 600–800 IU/day is within typical medical guidelines. The coupon is account-specific — not everyone will see it.
California Gold Nutrition Vitamin D3 5000 IU 90ct — $4.69 at iHerb (15% off)
CGN Vitamin D3 5,000 IU softgels, 90-count, is $4.69 (was $5.52) at iHerb. 4 More than 40,000 units sold in the past 30 days, making it one of iHerb's highest-velocity products. The 360-count size is available at $13.84 (was $16.28).
California Gold Nutrition LactoBif 30 Probiotics 60ct — $15.64 at iHerb (30% off)
CGN LactoBif 30 Probiotics (30 billion CFU, 60 capsules) is $15.64 (was $22.35, 30% off) at iHerb. 4 Over 70,000 units sold in the last 30 days — the highest monthly sales volume of any product in today's scan. The 5-billion-CFU entry-level version (60ct) is also on sale at $6.82 (was $9.75, 30% off).
MaryRuth Organics Megadose Liposomal Vitamin D3 — from $12.24 (Amazon S&S)
MaryRuth Organics (US organic supplement brand known for liquid and gummy formats) Megadose Liposomal Vitamin D3 drops to $12.96 with 10% S&S or $12.24 with 15% S&S, down from a $21.79 list price — roughly 40% off. 9 No separate clip-on coupon required; the S&S discount alone does the work. The Liquid Morning Multivitamin (15.22 oz) follows a similar pattern: $14.18 with 15% S&S (was $21.95). Requires Prime for free shipping; the 15% S&S rate requires 5+ active S&S deliveries that month.
California Gold Nutrition CollagenUP — $14.84 at iHerb (15% off)
CGN CollagenUP hydrolyzed marine collagen powder (7.26 oz) is $14.84 (was $17.46) at iHerb, with over 80,000 units sold in the past 30 days. 4
Quest Spicy Cheddar Cheese Crackers 12pk — $11.23 (Amazon, select accounts)
Quest Nutrition (protein snack brand) Spicy Cheddar Blast Cheese Crackers, 12-pack of 1.06 oz bags, each with 10g protein and 5g net carbs, drops to $11.23 after a 20% clip coupon plus 5% Subscribe & Save (from $14.97 listing, 56% off the $25 MSRP). 10 Free shipping with Prime or $35+.
The coupon is account-selective — multiple community members reported seeing $20 instead of $11.23. Check your listing before counting on this price.
Fitness equipment
Merach Q1S Magnetic Rowing Machine — $139.99 (Amazon, code XTUE457K)
The strongest community signal in this scan. Merach Q1S, sold by DEKE-US on Amazon, supports 16 levels of quiet magnetic resistance, a dual slide rail, up to 350 lb capacity, and fits users up to 6'7". Use promo code XTUE457K to bring the price from ~$189.99 to $139.99 shipped free. 11
Slickdeals score: +233 with 92 comments and 54,991 views; deal confirmed active by Slickdeals staff on May 16. Rated 4.4/5 from 2,100+ Amazon reviews. Multiple long-term community members describe it as stable and quiet at this price point.
Echelon Connect Sport 2 Indoor Cycling Bike — $130.50 (eBay, code VIPOUTLETMAY26)
Echelon (exercise equipment brand) Connect Sport 2 cycling bike (model ECH-SPT), with 32 resistance levels and Bluetooth for Peloton/QZ app compatibility, is $130.50 on eBay through seller vipoutlet (rated 4.8/5 stars, 385+ ratings) using code VIPOUTLETMAY26. 12 Free shipping. Original retail: ~$398 (67% off). Slickdeals score: +40, 37 comments.
Two long-term owners (5+ years and 6+ months respectively) confirm reliability; both noted the lack of a built-in screen as a feature rather than a drawback. Buyers who ride seriously note the geometry differs from road bikes.
Zelus Weighted Vest — $29 (Amazon, 42% off)
Zelus Weighted Vest, available in 6 lb, 12 lb, 20 lb, and 30 lb versions, is listed at $29 on Amazon (down from $50), a 42% reduction. 13 $29 is the starting price; heavier options may differ. The same product is also available on Walmart.
Yoleo XL Foldable Adjustable Weight Bench — $59.99 (Amazon, code 94BFCS6Q)
Yoleo XL (Absolute Fitness 1989 via Amazon), 827 lb capacity, 84 position combinations, folds to 31.9" × 17.1" × 8.67" and weighs 23 lbs. Use code 94BFCS6Q to bring the $99.99 price down to $59.99 (40% off), free shipping. 14 Slickdeals score: +71, but community reviews are mixed — padding thinness and a seat-back gap are flagged as comfort issues for intermediate exercises. Multiple buyers called it adequate for beginner use over 1–2 years.
Active promo codes and stacking guide
iHerb
iHerb (online vitamins and supplements retailer, parent company of Vitacost) currently has no single verified sitewide code at checkout — the predecessor codes RUS173 and GOLD60 are confirmed expired. 415 The following codes from coupon aggregator Discoup are reported active but not independently verified at checkout:
| Code | Discount | Condition | Expires |
|---|---|---|---|
| NEW*** (click to reveal) | 20% off | First order, new customers only | 12/31/2026 |
| MAY*** (click to reveal) | 15% off $60+ / 20% off $100+ | Some markets excluded | 6/17/2026 |
| Automatic | 20% off first Autoship order | Autoship signup required | 12/31/2026 |
Additionally, a BOGO 40% off iHerb Brands promotion (California Gold Nutrition, Mild By Nature, and others) is active now — mix and match, no code required. 4 Free shipping on orders over $30.
Vitacost
Vitacost (discount supplement retailer, now an iHerb subsidiary) is actively migrating customers to iHerb: the full-site banner offers 30% off your first order when you create an iHerb account. 16 For purchases staying on Vitacost, these codes are verified on the official deals page as of today: 17
| Code | Brand / category | Discount | Expires |
|---|---|---|---|
| WKND25 | Rise Bar (protein bars) | 25% off | 5/18 at 7 AM ET |
| 15SAVEFUSION | Vitafusion (gummy vitamins) | 15% off | 5/18 at 7 AM ET |
| 15ALLYESBAR | The YES Bar | 15% off | 5/25 at 7 AM ET |
| SELECTORG20 | Select organic food & beverages | 20% off | 5/25 at 7 AM ET |
| (no code) | Clearance — 5,838 items | Up to 50% off | While supplies last |
WKND25 and 15SAVEFUSION expire tomorrow morning (5/18 at 7 AM ET) — those are the two to act on today if relevant.
Amazon coupon stacking — how it works
Several deals in this issue (Orgain, Cellucor, Nature Made, PBfit) use the same mechanic: clip a one-time or recurring digital coupon on the product page, then select Subscribe & Save at checkout. The Subscribe & Save discount (5% base, 15% if you have 5+ active S&S subscriptions delivering that month) stacks on top of the coupon discount. You can cancel the subscription after the first delivery with no penalty.
Alert: Kirkland Signature Whey Protein — possible stock-out
Costco's Kirkland Signature Whey Protein (Creamy Chocolate, 5.4 lbs, typically $49.99–$59.99) is not in the May coupon book and is being reported out of stock at multiple warehouses as of early May 2026. Several members on r/Costco noted it was absent from the app as well, raising questions about a possible discontinuation. 18 No official confirmation from Costco; check your local warehouse or the app before making a special trip.
Cover image: Costco May 2026 Member-Only Savings coupon book cover, image from Costco Insider
References
- 1Hip2Save — Orgain Protein Powder
hip2save.com
- 2Slickdeals — Cellucor Creatine
slickdeals.net
- 3iHerb Sports Deals
iherb.com
- 4iHerb Deals Page
iherb.com
- 5The Krazy Coupon Lady — Costco Coupon Book May 2026
thekrazycouponlady.com
- 6EatingWell — Best Costco Deals May 2026
eatingwell.com
- 7Slickdeals — PBfit Protein Ball Mix
slickdeals.net
- 8Slickdeals — Nature Made Vitamin D3
slickdeals.net
- 9Hip2Save — MaryRuth Organics
hip2save.com
- 10Slickdeals — Quest Crackers
slickdeals.net
- 11Slickdeals — Merach Rowing Machine
slickdeals.net
- 12Slickdeals — Echelon Cycling Bike
slickdeals.net
- 13Women's Health — TikTok Fitness Products 2026
womenshealthmag.com
- 14Slickdeals — Yoleo Weight Bench
slickdeals.net
- 15Discoup — iHerb Promo Codes
discoup.com
- 16Vitacost Homepage
vitacost.com
- 17Vitacost Coupons Page
vitacost.com
- 18Reddit r/Costco — May 2026 Megathread
reddit.com
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