With a storehouse of protein powder on the market nowadays, it can become a hassle for the consumer to decide what to buy. If you're the health-conscious individual, your best bet would be to go for a natural protein powder free from artificial sweeteners like aspartame, acesulfame potassium(aka acesulfame k or ace k), sucralose(aka splenda) and saccharin.

While it's not as popular as the regular protein powder in terms of variety and taste, the natural protein powder is a great purchase simply because it's healthier. For me personally, since I will be consuming a protein powder regularly, I prefer to opt for a natural one. Taste can always be adjusted by adding other ingredients like fruits for instance.

If you can get the natural protein powder mostly in undenatured form, it's your best buy. For instance whey protein isolate which has used the cross-flow microfiltration(CFM) process yields the highest and purest form of whey protein 99% undenatured. Below is a list of some of the best natural protein powder for muscle building.

(1) Whey Protein Isolate / Micellar Casein Protein / Protein Blend

Muscle Feast is renowned for producing some of the best natural protein supplements in the bodybuilding industry.

Muscle Feast Whey Protein Isolate - This supplement comes in a 5 pound protein tub with a total of 81 servings and 26 grams of protein per serving and 6.5 grams of branched chain amino acids(BCAAs) and with no fat, no carbs and no lactose. This is hardcore protein for hardcore athletes. Whey protein isolate has a high biological value(BV) at 154 which means it feeds your muscles fast and really ideal post-workout after a grueling workout whereby you need to repair and rebuild depleted muscle tissues.

Pure WPI - Whey Protein Isolate Natural 5 Lbs

Muscle Feast Micellar Casein Protein - As compared to whey isolate, micellar casein protein takes more time to digest and get absorbed by your muscles, hence providing a sustained release of amino acids to your muscles up to 7 hours. It's difficult to experience muscle catabolism when you have micellar casein protein regularly. Muscle Feast has really a top-notch micellar casein protein hands down.

Pure micellar casein, naturally sweetened and come with flavors and no flavor. Micellar Casein - 4lbs (Unflavored) Pure micellar casein, unsweetened and unflavored. Hardcore Micellar Casein - 4lbs

Muscle Feast Protein Blend - Why not get the best of both worlds by using a protein blend with whey isolate and micellar casein together? Muscle Feast has come up with such a product which is packed with 27 grams of protein per serving, 6.2 grams of BCAAs and a total of 76 servings in a 5 pound protein tub. Feed your muscles within 5 minutes and up to 7 hours.

Premium Blend Protein (Chocolate)

(2) Whey Protein Concentrate / Micellar Casein Protein

Another supplement company which is taking the bodybuilding world by storm with amazing reviews is Naked Nutrition simply because of the high quality of their products which are totally natural and free from artificial sweeteners.

Naked Nutrition Whey Protein Concentrate - This product contains only one ingredient: 100% grass-fed whey protein from California which has been cold processed meaning they have not been denatured. You get 25 grams of protein per serving as well as 5.9 grams of BCAAs.

NAKED WHEY - 100% Grass-Fed Whey Protein Powder - 5lb Bulk

Naked Nutrition Micellar Casein protein - This product contains only one ingredient: 100% micellar casein from US farms which has been cold processed and undenatured. You get 26 grams of protein and 5.9 grams of BCAAs per serving.

NAKED CASEIN - 100% Micellar Casein from US Farms - 5lb Bulk

(3) Egg Protein

Eggs are one of the best protein sources you can get and as well as being cheap and versatile, they play an integral role in a bodybuilder's diet. The only drawback is eating too many whole eggs everyday might not be too healthy, this is why separating the yolks from the whites is necessary like eating 2 whole eggs and 6 egg whites. Unfortunately this can become a hassle if you do this everyday but thanks to natural egg white protein powder from MRM(Metabolic Response Modifiers), your nutrition becomes much more easier. Being hormone and antibiotic free and no artificial sweeteners, you get the real good stuff.

MRM All Natural Egg White Protein,French Vanilla 24 Ounce

If you're really serious about muscle building, adding some natural protein powder to an already solid diet will give you an upper edge for your goals. Best of luck.