Ultimate Nutrition ISO Cool Review

Editor's Review: 3.5 / 5.0

What You Should Know

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Ultimate Nutrition ISO Cool is a straight protein powder. This means every calorie on the nutrition label is from the 23 grams of protein in the powder. Low carbohydrate dieters can use this protein powder as part of a low carbohydrate diet because there are no carbohydrates in the mix. There is also no fat, so the dieter can use this protein kin low calorie smoothies, shakes and recipes. Ultimate Nutrition ISO Cool is a fantastic supplement for weight loss, dieting, bodybuilding and healthy living, but there is one concern that must be noted.

List of Ingredients

Premium Whey Protein Isolate, Cocoa, Natural and Artificial Flavors, Sucralose, Acesulfame Potassium, and Soy Lecithin

Essential Amino Acids: L-Leucine, L-Isoleucine, L-Valine, L-Lysine, L-Threonine, L-Methionine, L-Phenylalanine, L-Tryptophan

Non-Essential Amino Acids: L-Arginine, L-Aspartic Acid, L-Cystine, L-Alanine, L-Glutamic Acid, L-Glycine, L-Histidine, L-Proline, L-Serine, L-Tyrosine

Product Features

Under the Essential Amino Acids tab L-phenylalanine is listed. While this is an essential amino acid, it is commonly found in lean meats and other food sources. Adding more L-phenylalanine to the diet could cause negative side effects for dieters with mood disorders.

L-phenylalanine is known to affect mood. Dieters with bipolar disorder, manic disorder, depression, anxiety or panic disorder should only take Ultimate Nutrition ISO Cool after consulting with their attending physician. Adding more L-phenylalanine to the diet could cause mood swings. This is especially important for dieters taking prescription medications to control mood.

Protein powder has been shown to decrease appetite. In one study, men who admitted to snacking heavily between meals were given different types of lunches – high carbohydrate, high fat and high protein. The dieter eating the high protein lunch managed to go more than four hours without feeling the need for a snack, while the other participants consumed snacks between meals. Protein helps regulate blood glucose so the brain does not signal hunger between meals.

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  • Ingredients are listed online.
  • The supplement is available from multiple online stores.
  • Contains no carbohydrates.
  • Contains no fat.
  • Available in multiple flavors.
  • Can be easily added to shakes or smoothies.


  • May not mix well.
  • May taste grainy.
  • Contains L-phenylalanine.
  • Not appropriate for meal replacement.


Ultimate Nutrition ISO Cool is a cold processed whey protein supplement with less than 100 calories per serving. The protein powder does not contain carbohydrates or fat, so the low carbohydrate and low calorie dieter can easily add the powder to meals without gaining weight from excess calories or carbohydrates. Aside from the addition of L-phenylalanine to the diet, this is one of the best protein powders we have reviewed. The two flavors are a bit weird – Apple and Peach Parfait.

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