Medically reviewed by Eric L. Giang, DO | Reviewed May 2026
When a patient comes to see me at my Modesto office, preparing for shoulder replacement, hip replacement, or knee replacement, surgery day gets a lot of the attention. The procedure itself. The implant. The anesthesia. But the weeks leading up to surgery? That preparation tends to get underestimated.
One of the first things I tell patients is that nutritional preparation for surgery can be just as important as anything that happens in the operating room. What you eat in the weeks before your procedure may shape how well your body handles the physical stress of surgery and how smoothly your recovery begins.
Key Takeaways
- Protein stores built before surgery may help reduce muscle loss during recovery.
- Certain supplements can increase bleeding risk and should typically be stopped in the weeks before surgery.
- Blood sugar management matters. Elevated blood sugar before surgery can increase the risk of infection and slow wound healing.
- Ask your surgeon and care team for personalized guidance. What applies to one patient may not apply to another.
What I See in My Patients
After years of performing surgical procedures in Modesto, I’ve noticed a pattern. Patients who put thought into how they’re fueling their bodies before surgery tend to walk through the recovery process more confidently. Nutrition matters more than most people realize.
I also see the flip side. Patients who arrive malnourished or carrying poorly controlled blood sugar tend to face more challenges in the post-operative period. Some of them didn’t know those things were affecting their surgical risk. That’s part of why I bring up nutritional preparation for surgery early in the pre-operative conversation, not as a footnote after everything else has been discussed.
The Central Valley has a high rate of diet-related chronic conditions. In many cases, they’re within a patient’s control to address before an elective procedure.
Why Pre-Surgery Nutrition Matters
Surgery places significant stress on your body. From the moment the procedure begins, your body mobilizes resources to manage blood loss, contain inflammation, and begin repairing tissue. If you arrive at surgery already running low on key nutrients, your body has less to work with from the start.
Pre-operative nutrition can influence the inflammatory response, wound healing, immune function, and how much muscle you retain through the recovery period. Surgery triggers a natural inflammatory cascade, and your nutritional status affects how your body manages it. Collagen synthesis, which drives tissue repair, depends on adequate vitamin C and protein. A well-nourished immune system tends to be better equipped to prevent post-surgical infection.
Protein: The Most Important Nutrient Before Surgery
If I had to single out one nutrient to prioritize before surgery, it would be protein.
Protein provides the amino acids your body uses to synthesize new tissue, maintain muscle mass, and produce the enzymes and antibodies that support your immune system. Before surgery, the goal should be to build up your protein stores as much as reasonably possible. I generally advise patients to focus on lean meats, eggs, dairy, legumes, and fish in the weeks leading up to their procedure.
Individual protein needs vary depending on your weight, age, activity level, and the type of surgery you’re having. Older patients are especially worth calling out here, as many already consume less protein than their bodies need on a normal day. Before surgery, that gap matters even more. Your care team can help you figure out a realistic daily target.
Micronutrients That May Support Your Surgical Outcome
Beyond protein, a few vitamins and minerals come up regularly in conversations about pre-operative preparation.
Vitamin C supports collagen formation and acts as an antioxidant. Citrus fruits, bell peppers, and leafy greens are good sources.
Iron supports red blood cell production. Arriving at surgery anemic can complicate the procedure and extend recovery. If you’ve been feeling unusually fatigued, pale, or short of breath, flag that with your care team well before surgery. Iron deficiency can usually be addressed, but it takes time.
Vitamin D and calcium are particularly relevant for patients having bone-related procedures like total shoulder replacement. These nutrients support bone density and healing at the surgical site.
Zinc plays a role in wound healing and immune function, making it relevant in the pre-operative period.
A standard multivitamin may help cover some of these bases, but it isn’t a substitute for a nutrient-dense diet.
What to Stop Taking Before Surgery
This is one of the most important conversations I have with pre-surgical patients, and it often surprises them. Some supplements that are otherwise beneficial can increase bleeding risk or interact with anesthesia. Stopping them at the right time is part of safe surgical preparation.
Common supplements to typically discontinue before surgery, usually one to two weeks prior, though your team may have different guidance:
- Fish oil and omega-3 fatty acids can thin the blood
- Vitamin E in high doses has blood-thinning properties
- Garlic supplements may interfere with clotting
- Ginkgo biloba is associated with increased bleeding risk
- St. John’s Wort can interact with anesthesia medications
The timing and specifics vary depending on your procedure and health profile. Do not stop any prescribed medications without talking to your surgeon or primary care physician first. The list above refers to supplements, not prescriptions.
My Approach with Surgical Patients
As a fellowship-trained orthopedic surgeon, I’ve always paid close attention to the factors that influence surgical outcomes beyond the operating room. My training made clear that the best results come from treating the whole patient, not just the joint that needs replacing.
In my practice here in Modesto, I routinely screen for pre-operative risk factors that include nutritional concerns. For patients scheduled for shoulder, hip, knee, or revision surgery, I may ask about current diet, supplement use, weight history, and whether recent bloodwork has flagged anything like anemia or low vitamin D. These aren’t just administrative checkboxes; they’re things I want to know before we go to surgery.
I believe orthopedic surgeons have a responsibility to bring nutritional preparation for surgery into the conversation early. A few proactive steps in the right direction can meaningfully influence what happens on the other side of the procedure.
Summary
Surgery day may be what gets circled on the calendar, but the weeks before it can shape what happens after. Building protein stores, staying hydrated, managing blood sugar, auditing your supplement list — these are all things you can address when you still have time on your side.
If you’re approaching a procedure and haven’t yet talked with your care team about nutritional preparation for surgery, I’d encourage you to bring it up at your next appointment. And if you’re a patient in the Modesto area preparing for a shoulder, hip, or knee procedure, I’m happy to work through your pre-operative questions with you. Reach out to our office to schedule a consultation.
Frequently Asked Questions
Can I take my usual vitamins and supplements before surgery?
Not necessarily. Some supplements increase bleeding risk or interact with anesthesia. As a general rule, review your full supplement list with your surgical team at least two weeks before your procedure. Don’t assume something is safe just because it’s labeled natural or sold over the counter.
What about the night before surgery? Can I eat or drink anything?
Your surgical team will provide specific NPO (nothing by mouth) instructions ahead of your procedure. These typically require stopping food and limiting fluids several hours before surgery. Follow those instructions exactly. Eating or drinking before anesthesia can create complications.
I have diabetes. Does that change anything for pre-surgical nutrition?
Yes. Blood sugar management before surgery directly affects infection risk, wound healing, and the recovery process. If you have diabetes, I encourage you to work closely with your endocrinologist or primary care physician to optimize blood sugar control in the months leading up to any elective orthopedic procedure.
