R1 Source7 Protein: Staged-Release Protein for All-Day Muscle Support

R1 Source7 Protein is a premium, multi-source protein blend designed to deliver a steady flow of amino acids to your muscles over an extended period. Using seven distinct protein sources, ranging from fast-digesting whey isolates to slow-releasing casein, this formula provides balanced nourishment ideal for morning, midday, post-workout, or nighttime use.

Each scoop contains 22 grams of high-quality protein with naturally occurring EAAs, BCAAs, and other essential amino acids needed for recovery, strength, and lean muscle maintenance.

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What Makes Source7 Protein Different?

Most protein shakes focus on a single protein type, which limits absorption time and amino acid delivery. R1 Source7 Protein uses a tiered absorption matrix, allowing your body to benefit from both rapid and extended protein release.

Key advantages include:

• 7 high-quality protein sources

• Fast, medium, and slow digestion speeds

• Over 10g essential amino acids (EAAs)

• Over 7g conditionally essential amino acids (CEAAs)

• Over 4g non-essential amino acids (NEAAs)

• More sustained amino acid delivery

• Smooth flavor and mixability

This versatility makes it an excellent all-in-one daily protein option.

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The Seven Protein Sources Inside Source7

Source7 Protein blends fast-, medium-, and slow-digesting proteins to ensure a staggered release of amino acids over several hours.

Fast-Acting Proteins (Rapid Absorption)

Designed to begin supporting muscles almost immediately after consumption.

• Whey Protein Isolate – fast absorption, low fat & carbs

• Whey Protein Concentrate – naturally rich in bioactive compounds

• Hydrolyzed Whey Protein – pre-digested for ultra-rapid uptake

• Native Whey Protein Isolate – derived directly from milk for higher purity

Medium-Release Proteins (Balanced Digestion)

Great for steady amino acid delivery after the initial whey burst.

• Milk Protein Isolate – contains both whey and casein for balanced release

• Pea Protein – plant-based protein with a strong EAA profile

Slow-Release Protein (Extended Absorption)

Ideal for prolonged amino acid delivery and nighttime recovery.

• Micellar Casein – digests slowly, helping support muscles for hours

This combination ensures your muscles receive amino acids over multiple digestion windows, rather than all at once.

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Why Staged-Release Protein Matters

Protein timing can greatly influence muscle recovery and growth. A staged-release formula like Source7 offers benefits such as:

• Improved muscle repair throughout the day

• Reduced muscle breakdown during downtime

• Better support for lean muscle maintenance

• Enhanced amino acid availability any time

This makes Source7 perfect for everyday use—not just post-workout.

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Amino Acid Profile (Naturally Occurring)

Each serving provides:

• Over 10g EAAs – essential for muscle protein synthesis

• Over 7g CEAAs – including glutamine and arginine

• Over 4g NEAAs – supporting metabolism and tissue recovery

These numbers reflect naturally occurring amino acids found in quality milk-based and plant-based proteins.

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When to Use R1 Source7 Protein

Because of its tiered digestion, Source7 fits seamlessly into any part of your day:

• Morning: steady amino acid support after fasting overnight

• Pre-workout: fuel for sustained energy

• Post-workout: fast AND extended recovery nutrients

• Evening: slow-digesting proteins support overnight repair

One scoop easily adapts to any schedule or fitness goal.

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Who Should Use Source7?

R1 Source7 Protein is ideal for:

• Athletes wanting round-the-clock muscle support

• Individuals needing a versatile daily protein

• Anyone looking to increase protein intake for lean muscle

• People who prefer smoother, richer-tasting shakes

• Those wanting a blend of milk-based and plant-based proteins

Its balanced release makes it suitable for beginners and advanced lifters alike.

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Final Thoughts

R1 Source7 Protein is a superior multi-protein blend that offers the best of fast, medium, and slow-digesting proteins in one scoop. With seven high-quality sources and a robust amino acid profile, it delivers comprehensive, sustained nourishment your muscles need to grow and recover efficiently.

Whether you’re looking for a daily protein, a post-workout recovery shake, or an all-in-one formula to keep amino acids flowing throughout the day, Source7 provides a delicious and science-backed solution.

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Sources

1. Journal of Nutrition – Protein Timing & Muscle Protein Synthesis

2. Journal of Applied Physiology – Whey vs. Casein Absorption Rates

3. Nutrients Journal – Benefits of Mixed Protein Sources

4. Sports Medicine – EAAs & Muscle Recovery

5. International Dairy Journal – Native Whey Protein Benefits

6. Manufacturer ingredient profile for Rule 1 Proteins