• 100% Whey Protein Isolate
  • Award Winning Taste
  • Ultra High Bio-availability
  • 25g Pure Whey Protein Isolate

the science

Isothority is a cross-flow cold-microfiltered whey protein isolate. Sounds fancy, right? Let's break it down: Isolate is the purest form of Whey Protein available. You get less filler, carbs, lactose, etc. This means it also digests much more easily without stomach issues.

The method by which the protein is extracted is much more precise. Rather than using extreme heat, acid washes, and other harmful processes, we utilize a filtration system to isolate the protein.

This leaves an incredibly clean protein that is easy to flavor, has a great texture, and digests extremely well. There truly is not another protein that is this pure, and tastes this good.

Who is it For?

Everyone. If you are exercising, restricting your calories, or cleaning up your diet - you'll benefit from Isothority. Isothority is especially important after your workout as it will help you recover faster, be less sore, and boost your metabolism.

What Will I notice

This is a tricky question. Here's another way to look at it: What would you notice from eating a chicken breast, or egg whites? In general, you will be less sore after your workouts. Your body will adapt and gain strength and endurance much more easily. You'll also boost your metabolism and stave off hunger more easily when taking a quality protein source in.


How do I use it?

The most important time is after your workout - 1 scoop mixed with 6oz of water (or milk) will do it for most everyone. It can also be utilized at any other time you would need a protein source; as part of a meal, as a milk shake, or just to increase total protein intake for the day.


Customer Reviews

Based on 286 reviews
Brett M.


Kirk J.
Glazed Donut

Excellent product. The taste is amazing and the mixability is the best I’ve seen with a protein. Also arrived quickly. Will certainly be buying other products!

Nicholas R.
Good taste

Enjoying the 3 flavors I have purchased

Thanks Nicholas!

Tomasa H.
Not the quality I was looking for

I make myself I shake for work after 2 hours it was really Slimy really gross 🤮 never buy this product before

Hey Tomasa,

Our Isothority is not meant to be mixed 2 hours before you drink it. This will cause it to thicken and become slimy. This is due to the Xanthan Gum that is mixed into it, which helps change it from a watery drink to one with a bit of texture. Over time this absorbs too much water and will thicken to a slimy texture.

Just like you wouldn't put your cereal in milk for 2 hours before eating it, Isothority should be mixed up and consumed within 10 minutes or so. It won't hurt the product's quality, but it will change the texture for you.

Matthew H.
Best tasting protein i've ever had

I love the flavor of this protein powder. While it is only the second brand of protein I've ever bought, i can tell that it is better than all the other ones out there.

Thanks Matthew!!

Derek A.


Thanks Derek!

Tami L.
Protein powder

I am always very reluctant to purchase protein powders without sampling it first so I was thrilled to find Nutrithority had a few of their many flavors to purchase as samples. Each flavor mixed almost seamlessly in just 5 oz of the almond milk I used. The flavors were divine and no chalky after taste either!! When I decided to order the full-sized product, I struggled with which flavor(s) to order, so I ended up ordering 4 different flavors!!! The shipping of the samples and then afterwards, the full-sized tubs arrived within a matter of days, which makes a very anxious consumer over-the-top happy 😊

Thanks Tami!!

Isaac S.
Best tasting protein

Fast shipping and a great protein!!

Thanks Isaac!!

Lisa T.
Isothority glazed donut

I love it you can taste the glazed flavor

Thanks Lisa!

Casey M.
Best tasting protein ever

This is so delicious I can’t stand it. Looking forward to trying more flavors.

Thanks Casey!

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