Health Deals Radar — May 18, 2026

Today's confirmed savings span three categories — protein powder, vitamins & supplements, and fitness recovery — across Costco, Amazon, iHerb, Vitacost, and Slickdeals community picks. Below is the full rundown, organized by store and urgency, with historical-price context where available.

Quick-scan summary

Retailer	Top deal	Discount	Expires
Amazon (via Slickdeals)	Orgain Organic Vegan Protein 2 lb	~65% off (~$13.49)	While stock lasts
Amazon (via Slickdeals)	iMATCHME NAC 120-ct 900mg capsules	69% off ($10.80 w/ S&S)	While stock lasts
Amazon (via Slickdeals)	Quest Protein Crackers 12-pack	~25% off ($11.23 w/ coupon+S&S)	Unspecified
iHerb	Sitewide Wellness Sale (code MAY26SW)	15% off $60+ / 20% off $100+	This week
iHerb	All Thorne products	20% off (flash sale, extended)	Limited
iHerb	BOGO	Buy 1 Get 1 80% off	Ongoing
Costco (in-warehouse)	Orgain Collagen Peptides	$6 off	Through June 7
Vitacost	Dr. Bronner's products (code SELECTBRON)	20% off	May 25, 7 a.m. ET
Vitacost	Vitamins & supplements (CouponCabin)	$10 off	Confirm at checkout

Amazon — protein powder & supplements

Orgain Organic Vegan Protein Powder, 2 lb — ~$13.49 (was ~$33)

At roughly 65% off, the 2-pound bag of Orgain Organic Vegan Protein Powder (Vanilla Bean or Chocolate Fudge) is the sharpest protein-powder discount spotted in the current deal cycle. 1 The $13.49 price works out to about $6.75 per pound, well below the product's typical $15–16 per pound retail. Orgain (a USDA Organic, non-GMO, plant-based brand) rarely drops below $10/lb outside major sale events, so this is worth treating as a signal to stock up.

How to buy: Search "Orgain Organic Vegan Protein Powder" on Amazon; the discount appears to be applied in cart. No S&S required as reported. Verify the price before checking out — Amazon flash discounts can roll back.

Historical-low context: Orgain's 2-lb bag tracked at $13.70 as its single observed Amazon low in early 2026 per community reports. At $13.49 this is at or slightly below that level. 2

iMATCHME NAC Liver Detox Supplement, 120-ct 900mg — $10.80 (was ~$36)

Community-verified on Slickdeals' front page 3 with a 69% discount. The deal structure: list price ~$35.99, minus a clip-on coupon (20%) at checkout, then Subscribe & Save pricing brings it to roughly $10.80 with free shipping. NAC (N-Acetyl Cysteine) supplements typically range $15–30 for comparable 120-ct bottles on Amazon, making this near or below historical low for the bottle count.

Activation steps:

Click the on-page coupon checkbox before adding to cart
Select "Subscribe & Save" at checkout (cancel after delivery if you prefer)
No promo code needed

Note: S&S can be cancelled anytime after the first shipment with no penalty.

Quest Nutrition Spicy Cheddar Blast Protein Crackers, 12-pack — $11.23 after stacking

12-count (1.06 oz bags each) with 10g of protein per bag and low carbs. 4 Starting from $14.97, a 20% clip-on coupon + S&S drops the price to about $11.23, or roughly $0.94 per bag. Comparable single-serving Quest snacks sell for $1.50–2.00 at retail stores.

Stacking note: Clip the coupon on the product listing page before selecting S&S — Amazon doesn't always auto-apply clip coupons to S&S orders.

PreserVision AREDS 2 Eye Vitamin Supplement, 120-ct softgels — $18.59 w/ S&S

Ophthalmologist-recommended formula with Lutein, Zeaxanthin, Vitamins C and E, Zinc, and Copper. 5 Available via Subscribe & Save on Amazon at $18.59 for the 120-count softgel bottle. This specific count-per-bottle runs $22–28 at pharmacy retail, making the S&S price roughly 15–20% below typical.

iHerb — sitewide Wellness Sale + Thorne flash deal

iHerb (a global online health retailer with a wide catalog of third-party supplement brands) is running two overlapping promotions this week that can be stacked strategically.

Sitewide code: MAY26SW

15% off on orders over $60
20% off on orders over $100 6 7

Applies broadly across vitamins, supplements, and personal care. The 20% tier kicks in at $100 — worth consolidating a planned restock into one order to clear that threshold.

Thorne extended flash sale: 20% off all Thorne products

Thorne (a professional-grade brand used by clinics and sports programs) is sold on iHerb at 20% off as part of an extended flash sale. 8 The original flash sale ran May 13 and has been extended. Key Thorne staples spotlighted in community posts include their Whey Protein Isolate, Creatine, Daily Electrolytes, Magnesium Bisglycinate, and Amino Complex.

This stacks with MAY26SW only in the sense that both apply to the same order: MAY26SW takes the sitewide percentage off, and Thorne items are already reduced, so the effective Thorne discount depends on which trigger iHerb applies first. Based on standard coupon logic, the larger of the two discounts applies — confirm in cart.

Additional iHerb promotions running concurrently

Buy One, Get One 80% off — applies to a rotating selection of brands; check the iHerb "Specials" page for current items 6
10% credit on Professional Brands — earns store credit toward next purchase
Free shipping on orders over $25 (US domestic)
New customer code — community-reported 22% off first order on $60+; verify at checkout as code pools rotate

Costco — May–June coupon book (valid through June 7)

The May 2026 Costco Instant Savings Book, valid in-warehouse and online from May 11 through June 7, contains over 125 items. 9 10 The health-relevant confirmed item:

Orgain Collagen Peptides: $6 off (exact final price depends on your warehouse's base price; typically $18–24 for a large tub before discount). 11 Collagen peptides at Costco are priced per ounce below most online-only retailers even before the coupon, so this discount adds meaningful value.

Icy Hot Lidocaine Pain Relief No-Mess Roll-On, 3-Pack is confirmed at select Costco stores and Costco.com as part of the current savings period, making it a practical pick for workout-related soreness. 12

Price adjustment tip: If you bought any coupon-book items in the past 30 days before May 11, Costco's in-store returns counter (or costco.com/PriceAdjustmentView for online orders) will refund the difference. Bring your item number; a physical receipt is often not required but helps.

Vitacost — active codes this week

Vitacost (a Kroger-owned online health retailer focused on supplements, natural foods, and personal care) has several stacking-eligible codes active as of May 18. 13

Code	Discount	Expiry	Notes
SELECTBRON	20% off Dr. Bronner's products	May 25, 7 a.m. ET	Confirmed via live Vitacost product page
(auto at checkout)	$10 off vitamins & supplements	Confirm at checkout	Via CouponCabin, 15 verified offers as of May 16
(auto at checkout)	20% off select organic food & beverages	Confirm at checkout	Rotating selection; check your cart

One code for Vitafusion supplements (15% off) that appeared in aggregators was valid through 7:00 a.m. CT on May 18 — that window has passed as of today. It is listed here only as context; do not expect it to work.

Slickdeals community roundup — other picks

Beyond the deals with direct price data above, Slickdeals' health community has flagged these additional items worth monitoring:

Pure Protein Vanilla Protein Shake, 12-pack — $25.41 on Amazon 2
Swanson Vitamins — up to 50% off site-wide via active codes on CouponCabin as of May 18 14

Stacking guide: getting the most from today's deals

Three legitimate stacking windows that don't require any overlap between retailers:

Amazon S&S + clip coupon: The iMATCHME NAC and Quest cracker deals both require clipping the on-page percentage coupon first, then selecting S&S. Both steps compound. Cancel S&S after delivery if you only want one shipment.
iHerb MAY26SW + BOGO 80%: Build an iHerb cart that hits $100+. Add items on the BOGO 80% list plus any Thorne products on flash sale. Apply MAY26SW at checkout — the sitewide code typically applies on top of already-reduced prices (confirm in cart preview).
Costco price adjustment: If you have Costco receipts from mid-April through May 10 that include the Orgain Collagen Peptides or other coupon-book items, bring the item number to the returns counter for a same-trip adjustment. No need to return and re-buy.