The One Thing Most Patients Aren't Doing That Would Speed Up Their Recovery
Most surgical patients eat far too little protein. How much you actually need before and after surgery, which kind works best, and why I also recommend creatine.
I ask almost every patient scheduled for surgery the same question: how much protein are you eating? And almost every time, the answer is not enough. Not close to enough.
In fact, research shows that patients admitted for elective hip and knee surgery are typically consuming less than 0.6 grams of protein per kilogram of body weight per day — well below even the already-too-conservative government recommendation of 0.8 grams. For someone about to undergo a major surgery or recovering from a significant injury, that number is a problem.
Protein is the raw material your body uses to rebuild muscle, heal ligaments, strengthen bone, and repair the surgical site. Surgery and injury don't just require that raw material — they dramatically increase the demand for it. If you're not eating enough protein, your body will break down muscle elsewhere to find what it needs. That's the opposite of recovery.
Why the standard recommendation falls short
The government's recommended daily allowance (RDA) for protein — 0.8 grams per kilogram of body weight — is not a target for optimal health. It's the minimum needed to prevent deficiency in a sedentary person who isn't healing from anything. The ERAS and ESPEN guidelines, which govern enhanced recovery protocols at major surgical centers, recommend 1.5 to 2.0 grams per kilogram per day in the postoperative period. That's roughly double to two-and-a-half times the standard RDA.
Older patients face an additional challenge: anabolic resistance. As we age, the body becomes less efficient at converting dietary protein into muscle. A 70-year-old needs roughly twice the protein stimulus to trigger the same muscle-building response as a 25-year-old. This isn't optional biology — it's one of the primary reasons older patients struggle to regain strength after surgery, and why I discuss protein with every patient over 55 who comes into my office.
A study on total knee replacement patients who took 40 g of additional whey protein daily for two weeks before and two weeks after surgery showed significantly better walking speed and leg strength at 3 months. The high-protein group preserved functional muscle mass that the control group permanently lost.
| Patient / situation | Daily target | For a 180 lb person |
|---|---|---|
| Government minimum (RDA), not healing | 0.8 g/kg | ~65 g |
| Around surgery (ERAS / ESPEN) | 1.5–2.0 g/kg | ~120–165 g |
| Older adult (60+) with anabolic resistance | 1.6–2.0 g/kg | ~130–165 g |
Based on ERAS/ESPEN perioperative nutrition guidelines and emerging consensus literature. Always follow your physician's guidance if you have kidney disease or other conditions affecting protein metabolism.
What kind of protein — and why leucine matters
Not all protein sources are equal when it comes to triggering muscle repair. The key driver is leucine — an essential amino acid that acts as the trigger for muscle protein synthesis. You need roughly 3 grams of leucine per serving to meaningfully activate the repair process, and this threshold is actually higher in an injured or immobilized limb than in a healthy one. The muscle is in a catabolic state and the signal to rebuild has to be stronger.
Whey protein is my first recommendation because it's a complete protein, mixes easily, and delivers an excellent leucine profile — roughly 2.5 to 3 grams per 25-gram serving. Plant-based proteins (pea, rice) are incomplete and have lower leucine content; to get the same muscle-building response from a plant-based supplement, you need about 50% more powder. A label that says 25 grams of pea protein does not deliver the same effect as 25 grams of whey.
Creatine
I also recommend creatine monohydrate — 10 grams per day — for most surgical and injury patients. Creatine is one of the most thoroughly studied sports supplements in the world, with an excellent safety record and consistent evidence for supporting muscle energy metabolism, reducing post-exercise inflammation, and improving recovery. There's also a growing body of evidence for cognitive benefits, which is relevant for older patients managing anesthesia recovery.
One note: creatine affects creatinine levels in lab work, so tell your doctor before any bloodwork.
Frequently asked questions
When should I start increasing my protein — before or after surgery?
Both. Start increasing protein two to four weeks before surgery to build your reserve. Surgery is a catabolic event — it breaks tissue down — and going in with depleted stores makes recovery harder. Continue the elevated intake for at least four to six weeks after surgery, through the active phase of healing and rehabilitation.
Is it safe to eat that much protein?
For most people, yes. Safety studies have found no adverse effects at intakes up to 3 grams per kilogram per day, and the meaningful benefits plateau around 2 grams. If you have kidney disease or have been told by your doctor to limit protein, follow their guidance — but for the majority of patients, the bigger risk is eating too little, not too much.
Can I get enough protein from food alone, or do I need a supplement?
Food first — chicken, fish, eggs, Greek yogurt, and cottage cheese are all excellent sources. But most patients find it genuinely difficult to hit 130–160 grams per day through food alone, especially when appetite is suppressed after surgery. A daily protein shake adds 25–40 grams with minimal effort and is a reliable way to bridge the gap.
If you're preparing for surgery or recovering from a knee or hip injury, protein is one of the most practical things you can do to improve your outcome — and it starts at the grocery store.
This article is general education, not medical advice for your situation. Every knee and hip is different — talk with your own doctor about your care.