Amino Z latest coupon will get you great deals on a variety of products, but the most notable one in my opinion is on the Combat protein powder by MusclePharm.
Get 7 serves ($244g) for $7.95 vs. its original price of $19.95. Although it's shortdated (expiring June-September), you could get an even better deal if you buy 12 or more packs for $4.95 each.
Compare prices per serves - obviously the bigger tub you buy the better deal you get, but even then, the 4.5kg (130 serves) would cost you a minimum of $164.95 elsewhere which is $1.27 per serve. Amino Z's price on 133 serves (i.e. 19 bags of 7 serves or 4.64kg) comes to just $0.70 per serve. The cost for this would be $94.05.
130 serves will last you about 2 months if you take the protein powder two times a day (the minimum recommended amount), so you'll still be able to consume this product before its expiry date.
Promotion runs until Sunday, 22nd of May 11:59PM.