Dr. Murray’s $13.49 protein powder, a 50% walking pad, and Vitacost’s Sept. 16 cutoff (2026)

Prices were checked at 9:12 a.m. ET on Sunday, Sept. 6, 2026. The clearest current buys are iHerb’s 2-lb 3 Seed Protein Powder at $13.49, Amazon’s Vitafusion electrolyte packets at $6.92 with Subscribe & Save, and a code-dependent LONTEK walking pad at $154.99. Vitacost also has a broad set of automatic brand discounts through Sept. 16, but its promotion page does not show product-level prices or historical lows.

At a glance

Retailer	Item or promotion	Current price	Price math	Deadline and checks	Price status
iHerb	Dr. Murray’s 3 Seed Protein Powder · 2 lb	$13.49	$22.49 reference; $9.00 saved; 40% off	Daily Flash Deal; page showed about 2 hr 48 min remaining when checked	Current flash price; historical low unverified
Amazon	Vitafusion Hydraboost · 15 packets	$6.92	$7.28 after coupon, then 5% Subscribe & Save; $9.28 page reference	Coupon and subscription must appear in your account; no fixed expiry shown	Current community-verified stack; historical low unverified
Amazon	SlimFast meal-replacement shakes · 12 × 11 oz	From $13.98	25% coupon + Subscribe & Save; page header shows $20 comparison	Select accounts; flavor prices vary; free shipping with Prime or on $35+	Current account-dependent offer; historical low unverified
iHerb	California Gold Nutrition Defender 4 · 180 capsules	$11.02	$14.69 reference; $3.67 saved; 25% off	No item-level end date shown on the deal page	Current official deal; historical low unverified
Costco	Kirkland Signature Vitamin C · 500 ct	Not shown	Flyer says $3 off; no final or original price displayed	Valid Aug. 24–Sept. 20; limit 15; warehouse and online/location pricing can differ	Official flyer lead, not a ranked price
Vitacost	Top-brand and selected-brand promotions	Product price varies	30%, 25%, and 20% offers; automatic at checkout	Most listed offers end Sept. 16 at 7:00 a.m. ET; several 15% brand offers end Sept. 8 at 7:00 a.m. ET	Official promotion; SKU-level history not shown
Amazon	FITPLAM 5-in-1 adjustable weight set · 45 lb total	$55.99	$79.99 − $24 code `FIT45LB08`; 30% off	Code and seller must verify in cart; free shipping	Community code lead; historical low unverified
Amazon	LONTEK folding walking pad · 15% incline	$154.99	$309.99 − $155 code `PLKVI8C7`; 50% off	Code can fail; free shipping; verify seller and return terms	Community code lead; historical low unverified

The table separates a current discount from a historical-low claim. None of the selected sources supplies a reliable long-term price series for the exact item, so no offer above is labeled an all-time or verified historical low. The “reference” figures come from the retailer or deal page and are not a substitute for a price-history record.

Protein and hydration powders: start with the short clock

iHerb: 2-lb 3 Seed Protein Powder for $13.49

iHerb’s official Deals page lists Dr. Murray’s Super Foods 3 Seed Protein Powder, Pumpkin + Flax + Sunflower, Unflavored, 2 lb at $13.49, down from $22.49. That is $9.00 off, or 40%; the current price works out to about $6.75 per pound. 1

This offer is the strongest direct protein-powder price in the scan, but the clock matters. The page’s Daily Flash Deals module showed about 2 hours 48 minutes remaining at the 9:12 a.m. check. The page did not give a durable calendar expiry for this item, so treat the displayed countdown as the action window rather than assuming the price lasts through the week. 1

The official page also lists the product as unflavored and plant-based by its seed ingredients. Price is the evidence here; the page does not establish that the product fits a particular diet, taste preference, or protein target. Check the Nutrition Facts panel before substituting it for a powder already in your routine.

Amazon: Vitafusion Hydraboost packets for $6.92

The fresh Slickdeals post for 15-count Vitafusion Hydraboost Electrolyte Drink Powder Packets shows $7.28 after a clipped coupon, then $6.92 after 5% Subscribe & Save. The page shows $9.28 as its comparison price, so the standard stack saves $2.36, about 25%. A 15% Subscribe & Save tier was also displayed at $6.19, if your account receives it. 2

The post was dated Aug. 31 and showed no fixed end date. Amazon’s coupon visibility, subscription tier, Prime shipping, and final total are the deadline. This is an electrolyte drink mix, not a protein powder; keep that distinction in mind when comparing the low headline price with the iHerb powder.

Amazon: SlimFast shakes from $13.98

A Sept. 4 Slickdeals post lists select-account pricing for 12-pack, 11-oz SlimFast meal-replacement shakes. The starting price is $13.98 after clipping a 25% coupon and selecting Subscribe & Save. The page header shows $20, which is $6.02 above the starting price, but the deal includes several flavors and the source warns that the offer is account-dependent. 3

Use the exact flavor and account total rather than treating $13.98 as a universal 12-pack price. Prime or a $35 order supplies free shipping. Subscribe & Save can be canceled or changed after the order ships, but a recurring order is still something to manage.

Vitamins and supplements: two clean iHerb prices, one Costco flyer lead

iHerb: Defender 4 at $11.02

The official iHerb deal listing shows California Gold Nutrition Defender 4, 180 veggie capsules with vitamins C and D, zinc, and selenium, at $11.02 versus $14.69. The displayed saving is $3.67, or 25%. 4

The product page is the right place to check serving size and Supplement Facts. The deal page did not show a SKU-specific end date, so the current price is actionable but not a promise that the discount remains until the anniversary event closes.

iHerb: B Complex at $7.18

A second official iHerb listing puts California Gold Nutrition High Potency Vitamin B Complex, 30 veggie capsules, at $7.18 versus $8.98. The saving is $1.80, or 20%. 5

Neither iHerb price has a verified historical-low series in the accessible source. A lower price does not establish that a supplement is needed; compare the label with what you already take and with any advice relevant to your situation.

Costco: current vitamin savings, incomplete price math

Costco’s official warehouse-savings page is valid Aug. 24 through Sept. 20, 2026 and labels the displayed figures as warehouse pricing. The page lists Kirkland Signature Vitamin C, 500 count, with $3 off and a limit of 15. The page does not show the final or original dollar price for that row, so the flyer cannot establish a sale percentage or a product-level comparison price. 6

That makes Vitamin C a useful Costco stop, not a ranked buy. Costco says pricing can vary by location, Alaska, Hawaii, Puerto Rico, Business Centers, and online. Check the warehouse or online total before comparing it with iHerb’s item-level prices.

Fitness equipment: large percentage discounts, larger verification burden

FITPLAM: 45-lb adjustable set for $55.99

The Sept. 4 Slickdeals frontpage post lists a FITPLAM 5-in-1 adjustable PE dumbbell set with 45 lb total, or 22.5 lb per dumbbell, at $55.99. The source gives a $79.99 price before promo code FIT45LB08, making the code savings $24, or 30%. Shipping is free. 7

The set converts among dumbbells, a kettlebell, a barbell, weight plates, and push-up stands. The same page says the shopper must be logged in and that promo codes can vary by account or need to be reapplied. Verify the seller, the exact total, the included pieces, and the return policy before treating the 30% figure as a completed saving.

LONTEK: folding walking pad at $154.99

A current Slickdeals post lists the LONTEK 15% auto-incline folding walking pad at $154.99 after promo code PLKVI8C7. The page gives a $309.99 pre-code price, so the nominal saving is $155, or 50%. The listed specs include a 3 HP motor, 7.5 mph top speed, 12 speed levels, and 15% automatic incline. 8

The source warns that Amazon promo codes may not apply smoothly. Refresh the product page, re-enter the code, and check the payment step before paying. The deal page identifies the seller as TODOYONUS via Amazon and gives free shipping, but it does not provide a long-term price series or independent equipment testing. The 50% label is therefore a code-dependent current comparison, not a verified historical low.

Retailer-wide stops: useful deadlines, weak historical context

Vitacost: automatic discounts through Sept. 16

Vitacost’s official Coupons, Deals and Discounts page currently lists automatic promotions that mostly expire Sept. 16 at 7:00 a.m. ET. The page includes 30% off top brands, 25% off top brands, 20% off top brands, 20% off selected NOW Foods, Life Extension, Nutricost, and Sports Research, plus 15% off Raw Nutrition and several other brands. The page says promotions are while supplies last, exclusions may apply, and the discount applies automatically at checkout. 9

Several 15% brand offers have the nearer Sept. 8 at 7:00 a.m. ET cutoff. If a cart contains sports nutrition, vitamins, or protein products from one of those brands, compare it before Monday morning. Vitacost supplies the discount and deadline, but not a product-level historical price. Open the actual item page, record the regular and sale prices, and compare the final total with the iHerb and Amazon rows above.

iHerb: 10% credit on an $80 anniversary order

The official iHerb Deals page also advertises 10% Rewards Credit for eligible users who spend at least $80 during the Anniversary Event. The event runs through Sept. 16 at 12:00 p.m. ET after converting the source’s Pacific-time deadline. Qualifying spend is calculated after discounts and rewards and excludes tax, shipping, cancellations, and refunds; the credit is issued later and expires Oct. 31. 1

Treat the credit as a separate future-value promotion, not an instant 10% price cut. It can make a planned multi-item order more attractive, but it does not turn a product with no price history into a verified low.

Checkout order and expiry watch

Open the iHerb flash deal first. The 3 Seed Protein Powder carried a short countdown at the time of the check. Confirm that $13.49 still appears before adding it to the cart. 1
Check Vitacost’s short-window brands next. Several 15% offers close Sept. 8 at 7:00 a.m. ET; the larger set of brand promotions closes Sept. 16 at 7:00 a.m. ET. Discounts apply automatically, but stock and exclusions still control the result. 9
Rebuild the Amazon totals in your own account. Clip the Vitafusion coupon, select the displayed Subscribe & Save tier, and verify the SlimFast flavor price. For equipment, apply FIT45LB08 or PLKVI8C7 and confirm the code at the payment step. 2 8
Use Costco as a package-and-location comparison. The warehouse savings page runs through Sept. 20, but the Vitamin C row exposes only the $3 saving, not a final price. 6

The source boundary is deliberate: official retailer pages support current promotion terms; Slickdeals supports the posted Amazon deal math and community lead status; neither source set supplies a reliable all-time-low series for the selected items. Check the final cart, seller, shipping, account eligibility, stock, and return terms before acting.

Fuentes de referencia

1
iHerb Deals
iherb.com
2
Vitafusion Hydraboost deal
slickdeals.net
3
SlimFast meal-replacement shake deal
slickdeals.net
4
California Gold Nutrition Defender 4
iherb.com
5
California Gold Nutrition High Potency B Complex
iherb.com
6
Costco warehouse savings
costco.com
7
FITPLAM adjustable weight set deal
slickdeals.net
8
LONTEK walking-pad deal
slickdeals.net
9
Vitacost official promotions
vitacost.com