Compare Vitamins & Supplement Deals

Puritan's Pride cuts up to 70% off select items as part of its Memorial Day Sales Event. Plus, coupon code "PMDAY13" cuts $10 off orders of $75 or more. Even better, most items are eligible for free shipping. Combined, that's one of the best deals we've seen in recent months. (We saw $10 off orders of $65 or more two weeks ago, but that wasn't combined with a free shipping offer. Deal ends May 28.

GNC offers the BSN SYNTHA-6 Protein Powder 10.05-lb. Bag in Vanilla Ice Cream for $99.99. Better yet, add two to your cart (20lbs. total) for $149.61 and coupon code "abcart" drops them to $121.11. Even with $14.21 for shipping, that's $67.66 per bag and the lowest total price we could find by $37.

Soap.com offers the Optimum Nutrition Gold Standard 100% Whey Protein 5-lb. Tub in Cookies & Cream or Strawberry for $53.99. Coupon code "TWENTYOFF1" cuts it to $43.19. With free shipping, that's tied with our mention from three weeks ago (which was only for new customers) and the lowest total price we could find in any flavor by $11. It features 24g of protein per serving.

At Puritan's Pride, buy one Puritan's Pride brand vitamins or supplements and receive two more vitamins or supplements for free. (Eligible items are marked with "Buy 1 Get 2 Free" on the individual product pages; you can also buy two and get four free.) Plus, coupon code "AZ4V1" cuts an additional 10% off. That's the best such deal we've seen from Puritan's Pride since March, when we saw the buy one, get two free offer combined with $1 shipping, although the extra 10% off did not apply. Shipping adds $4.95. Deal ends May 31.

Puritan's Pride offers the Designer Whey Protein Powder 2-lb. Jar in Double Chocolate (pictured) or Vanilla for $22.99. During checkout, it drops to $20.70. With free shipping, that is tied with our mention from a week ago and the lowest total price we could find by $7.

Today only, GNC offers an assortment of men's and women's multivitamins and accessories for $5. (Click "$5 Fiesta" to see the eligible items; the discount applies in-cart.) That's one of the best sales we've seen from GNC in recent months. (We last saw a selection of items for sale for $5 in September, when it was combined with free shipping.) Shipping starts at $4.38, but get free shipping on orders of $99 or more.

A best bet is this GNC Melatonin 5 60-Count Dietary Supplement Bottle (pictured) for $11.99 before discount, $5 in-cart. With $4.38 for shipping, that's the lowest total price we could find by $4. (For further comparison we saw two for $10 shipped in July.)

Participating GNC stores take $10 off a purchase of $20 or more via this printable coupon. That's tied with our mention from two weeks ago as the best dollar-off discount we've seen from GNC. (We've seen up to 20% off and a few freebies as recently as February.) Some exclusions apply. Coupon expires June 30.