Health Deals Radar — May 19, 2026
Today's top verified deals: iHerb code MAY26SW (15–20% off, expires May 20) + new codes MBDAILY (20% off, no minimum) and MAYWELLNESS (22% off $60+, valid through May 30). Costco May coupon book continues — Orgain Collagen $6 off, Ensure $8.50 off through June 7. Amazon: YOSUDA Rowing Machine at $189.99 (20% off). Vitacost SELECTBRON: 20% off Dr. Bronner's through May 25. MyProtein Memorial Day sale starts May 22.
One deal today has a hard expiry: the iHerb code MAY26SW cuts out on May 20 at 10:00 a.m. PT. Everything else — Costco's May coupon book, Vitacost codes, and Amazon picks — stays open through later in the week or longer. Here's the full picture.
Quick-scan summary
| Retailer | Deal | Discount | Expires |
|---|---|---|---|
| iHerb (worldwide) | Code MAY26SW — any supplement order | 15% off $60+ / 20% off $100+ | May 20, 10 a.m. PT |
| iHerb (USA only) | Code MBDAILY — any order, no minimum | 20% off | While active — one-time use |
| iHerb (USA only) | Code MAYWELLNESS — orders $60+ | 22% off | May 30 |
| iHerb (no code needed) | BOGO promotions — iHerb brands | Up to 80% off second item | Ongoing |
| Vitacost | Code SELECTBRON — Dr. Bronner's products | 20% off | May 25, 7 a.m. ET |
| Costco (in-warehouse + online) | Orgain Collagen Peptides + Probiotics | $6 off → $23.99 | June 7 |
| Costco (in-warehouse + online) | Ensure Original Nutrition Shake | $8.50 off → $28.99 | June 7 |
| Costco (in-warehouse + online) | Nature Valley Chewy Protein Bars, 30-ct | $5 off | June 7 |
| Amazon | YOSUDA Magnetic Rowing Machine | 20% off → $189.99 | While stock lasts |
| Amazon | Barebells Protein Bars, 24-ct | ~$1.65/bar → $39.51 | While stock lasts |
iHerb — act before May 20
Code MAY26SW: 15% or 20% off sitewide (expires tomorrow morning)
MAY26SW is iHerb's (a global online supplement and wellness retailer) strongest currently active worldwide code. 1 It replaced three codes — WKND25, ALLNUTHAWAII, and 15SAVEFUSION — that all expired May 18. 2
- Orders over $60: 15% off
- Orders over $100: 20% off
- Valid in most countries, up to 2 uses per account, expires May 20, 2026 at 10:00 a.m. PT 1
To stack with a referral code: Enter a referral code (e.g., PJZ7818, DVO4205, or DQL3272) first in the referral field, then apply MAY26SW as your promo code at checkout. 3 Referral codes add a further 10% credit, which typically applies toward a future order.
iHerb — USA codes with more time
Two US-only codes discovered May 19 replace the expired batch and have more runway than MAY26SW.
MBDAILY: 20% off with no minimum (one-time use)
MBDAILY is unusual for iHerb: no $60 floor required. 2 Most US promotions require a $60+ cart to unlock any savings, so this is the code to use if you're restocking a single item or testing a new product.
- 20% off any order — no minimum purchase
- USA only, one-time use
MAYWELLNESS: 22% off orders $60+ (valid through May 30)
MAYWELLNESS edges out MAY26SW on discount depth for US shoppers building a larger cart, and it runs through the end of the month. 2
- 22% off orders over $60
- USA only, up to 2 uses, valid until May 30, 2026
Which code to use:
| Situation | Best code |
|---|---|
| US shopper, cart under $60 | MBDAILY (20% off, no minimum) |
| US shopper, cart $60–$99 | MAYWELLNESS (22% off) |
| US shopper, cart $100+ | MAYWELLNESS (22% off) |
| Non-US shopper, cart $60+ | MAY26SW (20% off — but act before May 20 at 10 a.m. PT) |
| Non-US shopper, cart $100+ | MAY26SW (20% off — same deadline) |
iHerb BOGO promotions (no code needed)
Three buy-one-get-one sales are currently running on iHerb with no promo code required — discounts apply automatically on tagged products: 4
- iHerb-brand products: BOGO 40% off
- Wellness / skincare / makeup: BOGO 80% off
- Sunscreen: BOGO 50% off
Check the iHerb "Specials" page for which specific products qualify — the tagged selection rotates.
Costco — May coupon book (through June 7)
Three health-category items are confirmed in the May 2026 Costco Instant Savings Book, valid in-warehouse and online through June 7. Discounts apply automatically at checkout for Costco members; no code entry is needed.
| Product | Regular price | Savings | Sale price |
|---|---|---|---|
| Orgain Collagen Peptides + Probiotics | $29.99 | $6 off | $23.99 |
| Ensure Original Nutrition Shake | $37.49 | $8.50 off | $28.99 |
| Nature Valley Chewy Protein Bars, 30-ct (PB Dark Choc) | Not disclosed | $5 off | — |
Orgain Collagen Peptides + Probiotics (collagen peptides blended with probiotic strains) at $23.99 is the standout: Costco's per-ounce pricing for collagen is already below most online-only retailers, so the $6 coupon deepens a baseline advantage. 5
Ensure Original Nutrition Shake (a ready-to-drink nutritional supplement commonly used to supplement caloric intake) at $28.99 saves $8.50 off the $37.49 regular price — roughly 23% off. 5
Nature Valley Chewy Protein Bars (Peanut Butter Dark Chocolate, 30-count, 10g protein per bar, gluten-free) carry a $5 off coupon with a limit of 10 boxes per member. 6 The exact sale price was not disclosed by the sources reviewed; check the shelf tag or Costco.com for the current discounted price.
Price adjustment reminder: Bought any of these items within the 30 days before May 11? Costco will refund the savings-book difference at the returns counter (or via the Price Adjustment page on Costco.com for online orders) — bring the item number.
Amazon — today's picks
YOSUDA Magnetic Rowing Machine — $189.99 (20% off)
The YOSUDA Magnetic Rowing Machine (a home-use cardio machine with magnetic resistance, Bluetooth connectivity, app support, and LCD display) is listed at $189.99, a 20% reduction from its regular price, as of May 19. 7
Historical low context is not available for this model — CamelCamelCamel data was not retrieved for this listing. At $189.99, the price is in the range typical for entry-level magnetic rowers; comparison-shop against comparable models before purchasing if historical low data is important to your decision.
Barebells Protein Bars, 24-count — $39.51 (~$1.65 per bar)
Barebells (a Swedish protein bar brand, roughly 20g protein per bar, low sugar) is available in a 24-count pack on Amazon for $39.51, or approximately $1.65 per bar as of May 19. 8 For context, Barebells' own website prices a 12-count box at $30.99 — the Amazon 24-count price works out to roughly half that per-bar rate. 8
Vitacost — active code
SELECTBRON takes 20% off Dr. Bronner's products at Vitacost (a Kroger-owned online health and natural-foods retailer) through May 25, 2026 at 7:00 a.m. ET. 9 Dr. Bronner's Pure-Castile soaps are multi-use concentrates (the 18-in-1 formulas cover body wash, shampoo, household cleaning, and more), making a 20% discount on a larger bottle a practical restock window.
If Vitacost's site loads slowly, try again during off-peak hours — the May 25 deadline gives several days of buffer.
On the horizon: MyProtein Memorial Day sale (May 22)
MyProtein (one of the largest online sports nutrition brands globally, owned by The Hut Group) has announced a 35% off sitewide Memorial Day sale starting May 22. 10 The sale has not yet launched as of May 19; check myprotein.com beginning May 22 to confirm the discount is live before ordering.
Code reference: iHerb quick guide
| Code | Discount | Min. order | Region | Expiry | Uses |
|---|---|---|---|---|---|
| MAY26SW | 15% / 20% off | $60 / $100 | Worldwide | May 20, 10 a.m. PT | 2 |
| MBDAILY | 20% off | None | USA only | While active | 1 |
| MAYWELLNESS | 22% off | $60 | USA only | May 30 | 2 |
| 22WELLNESS22 | 22% off | $60 | USA only | Ongoing | 2 |
Cover image generated by AI.
References
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- 5Costco Insider — Costco May 2026 Coupon Book
costcoinsider.com
- 6EatingWell — The 9 Best Deals at Costco in May 2026
eatingwell.com
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