Muscle Code Capsules

Muscle Code by Nautilus is a patented, clinically proven essential amino acid (EAA) supplement formulated in the precise ratio your body needs to maximize protein synthesis.

Unlike generic amino blends or incomplete proteins, Muscle Code contains EAAs in the exact balance required for effective muscle protein synthesis. This ensures nothing is wasted, giving you better results with less effort.

Leucine triggers muscle protein synthesis, while the other EAAs provide the raw material for new muscle tissue. Together, they repair muscle damage and accelerate recovery.

• Athletes & fitness enthusiasts to maximize training gains
• Aging adults to maintain lean muscle and strength
• Post-surgery or illness recovery to prevent muscle loss
• Anyone looking to support muscle health, recovery, or total-body protein needs

No. Whole foods and whey protein remain important for overall nutrition. This formula is designed to efficiently activate muscle protein synthesis, especially when consuming large amounts of protein isn't practical or convenient.

Take 4 capsules daily.

One serving daily, or as directed by your health professional.

Best taken after workouts to maximize recovery, but it can also be used in the morning, between meals, or before bed to support ongoing protein synthesis.

Yes. Muscle Code is light, fast-absorbing, and won't cause bloating.

Yes, daily use ensures consistent support for recovery and muscle preservation.

Many users feel improved recovery within 1–2 weeks, with muscle and strength benefits in 4–6 weeks.

Yes. Pre-workouts provide energy and focus, while Muscle Code provides the building blocks for muscle repair. Use post-workout if you're already taking a pre-workout.

The capsules are tasteless, odorless, and easy to swallow.

At room temperature, in a cool, dry place. Refrigeration is not required.

Typically 2 years when stored properly (see label for exact date).

It is rapidly absorbed — typically within 30 minutes — faster than most whole protein sources.

Muscle Code's patented EAA ratio is almost fully absorbed, making a 3.6g dose more efficient than whey or other protein powders with virtually zero wastage.

Gram for gram, this patented, clinically studied 3.6g amino acid dose stimulates muscle protein synthesis with up to 10x the efficiency compared to 40g of whey protein.

Gram for gram comparison is based on published human clinical research papers evaluating essential amino acid data to whey dose-response trials.

Yes, Muscle Code supports protein synthesis even at rest, helping maintain muscle during illness, aging, or recovery.

Yes. By preventing muscle breakdown, it supports faster rehabilitation and whole-body repair.

A proprietary blend of all nine essential amino acids (including leucine, isoleucine, valine, lysine, methionine, phenylalanine, threonine, histidine, and tryptophan) plus arginine in the correct clinical ratio.

Amino acids are the building blocks of protein and essential for cellular function. Essential amino acids — especially leucine — trigger muscle protein synthesis to repair and support muscle.

Yes — no gluten, dairy, soy, nuts, or shellfish. Always check label for latest allergen info.

No. Muscle Code is free from unnecessary fillers and artificial additives.

Manufactured in a cGMP-certified, NSF-certified, and third-party tested facility for quality and safety.

Proudly manufactured in the USA under strict quality standards.

Muscle Code is well-tolerated. No common side effects have been reported.

Yes. It can be stacked with protein powders, creatine, or pre-workouts.

Consult your healthcare provider before use.

Muscle Code is designed for adults. Consult a pediatrician before use in minors.