Protein Shakes, more commonly referred to as Muscle Milks, are combat stat boosting consumables. They give the player a large boost to overall levels in attack, strength, magic, and ranged. This boost will be lost upon death.
Sponsors can buy them from Ownercape Zone with their Sponsor Points, from Beefy Bill.
Executives can buy these with executive points at the Executive Zone, from the Observatory Professor.
They can also be made using the Herblore skill.
| Item | Boost | Length (in minutes) | Cost | |
|---|---|---|---|---|
 |
Attack Milk | +41 Attack Levels | 60 | 100 Sponsor/Executive Points |
 |
Strength Milk | +41 Strength Levels | 60 | 100 Sponsor/Executive Points |
 |
Archer's Milk | +41 Range Levels | 60 | 100 Sponsor/Executive Points |
 |
Mystic Milk | +41 Magic Levels | 60 | 100 Sponsor/Executive Points |
 |
Muscle Milk | +41 Attack, strength, ranged, and magic levels | 60 | 250 Sponsor/Executive Points |
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