---
title: "Rule One, R1 Casein Protein"
description: "R1 Casein Protein is a slow-release micellar casein formula that delivers amino acids and supports muscle rebuilding over several hours.   "
url: https://zonenutrition.me/product/rule-one-r1-casein-protein/
date: 2023-06-04
modified: 2026-03-22
author: "znutrition"
image: https://zonenutrition.me/cdn-cgi/image/format=auto,slow-connection-quality=30,onerror=redirect/https://zonenutrition.me/wp-content/uploads/2025/03/r1-casein-protein-4lb.jpg
type: product
lang: en
---

# Rule One, R1 Casein Protein

# ![](https://zonenutrition.me/cdn-cgi/image/format=auto,slow-connection-quality=30,onerror=redirect/https://zonenutrition.me/wp-content/uploads/2023/06/r1-casein-protein-7.jpg)

# **R1 CASEIN – SLOW-RELEASE 100% MICELLAR CASEIN FORMULA**

- 25g Slow-Release Protein

- Premium Micellar Casein

- Helps Feed Muscles While You Sleep

- Amino Acid Delivery For Up To 8 Hours

- Naturally-Rich In All 9 Essential Amino Acids (EAAs)

- Naturally-Rich in BCAAs (5g per Serving)

- Thick Satisfying Texture

- Gluten-Free

## ![](https://zonenutrition.me/cdn-cgi/image/format=auto,slow-connection-quality=30,onerror=redirect/https://zonenutrition.me/wp-content/uploads/2023/06/r1-casein-protein-5.jpg)

## **SLOW-RELEASE CASEIN PROTEIN: SUPPORTS MUSCLE GROWTH & PROMOTES MUSCLE RECOVERY**

(https://www.ruleoneproteins.com/products/casein-protein) is a slower digesting protein compared to whey protein. As a slower digesting protein R1 Casein works well between meals and at bedtime when more sustained amino acid delivery is desired.

The most important muscle building and regeneration processes occur at night while you’re sleeping. Therefore, it is necessary to provide your muscles with the nutrients that are needed for these processes. Casein is a slow-digesting protein that breaks down more slowly, delivering its amino acids over several hours.

R1 Casein contains all the essential amino acids that your body needs to function properly. Most importantly, this formula provides a high amount of leucine, which boosts muscle protein synthesis. A hit of calcium has been added to help promote strong bone growth and development, as well as iron to help prevent iron deficiency anemia.

**44% Essential Amino Acids (EAAs):** These nine amino acids cannot be synthesized by the body and are therefore essential. They must be obtained through the diet.

**40% Conditionally Essential Amino Acids:** During extreme physical exertion, needs for these amino acids may outpace our ability to synthesize them, which makes them conditionally essential.

**16% Non-Essential Amino Acids:** Produced internally and obtained through the diet, these amino acids act as building blocks throughout the body.

![](https://zonenutrition.me/cdn-cgi/image/format=auto,slow-connection-quality=30,onerror=redirect/https://zonenutrition.me/wp-content/uploads/2023/06/r1-casein-protein-6.jpg)

**INFORMED CHOICE® CERTIFIED**

Regularly tested for banned substances by the world class sports anti-doping lab, LGC.

**DIRECTIONS**

**Tasty Shakes:** Mix one heaping scoop of R1 Casein with approx. 296-355 ml of water, milk or your favorite beverage in a shaker cup or glass with a spoon. Drink between meals or before going to bed.

**Juice Smoothies:** Add your favorite fruit and ice to the above, mix in blender and enjoy!

**Supplement Facts**

Serving Size = 1 Scoop (35g)

4 LB Size = approx. 52 Servings

2 LB Size = approx. 26 Servings