If you’re getting ready for rhinoplasty, you’ve probably got a bathroom cabinet full of supplements, vitamins, or herbal products. You might be surprised to learn that many of these “natural” products are actually pharmacologically active — meaning they can affect bleeding, interact with anesthesia, or slow your healing. This guide breaks down what the research actually says, in plain language, so you can prepare safely for your surgery with Dr. Bonaparte.
You’re not alone if you take supplements — roughly one in three adults in North America use some kind of herbal or dietary supplement, and many don’t realize these products have real pharmacological effects. In a study of 526 patients heading into surgery, 44% were using supplements, but only 11% had this written down in their charts. Even more concerning: 16.5% were taking something that could interact with anesthesia, and 10% were on products that could interact with blood-thinning drugs used during surgery.
Both the American Society of Anesthesiologists (ASA) and the American Association of Nurse Anesthetists (AANA) recommend stopping most herbal supplements at least 1–2 weeks before elective surgery. For rhinoplasty — where even a little extra bleeding can affect how your nose looks — this precaution is especially important.
A 2017 cross-sectional study of 526 preoperative patients found that 44% used dietary/herbal supplements, but only 11% had this documented in their charts. Of those using supplements, 16.5% were taking products with potential anesthesia interactions and 10% were taking products that could interact with perioperative anticoagulants. Three patients had documented intraoperative bleeding events.
Levy I et al. World J Surg. 2017;41(4):927–934 · PMID: 27878352
| Supplement | Primary Concern | Evidence Level | When to Stop |
|---|---|---|---|
| Garlic | Bleeding (strongly associated) | High — cohort studies, case series | 2–4 weeks before |
| Hawthorn | Bleeding (strongly associated) | High — independent of anticoagulants | 2 weeks before |
| Ginkgo Biloba | Bleeding (with anticoagulants) | Moderate — conflicting evidence | 2 weeks before |
| Turmeric / Curcumin | Bleeding (with anticoagulants) | Moderate — antiplatelet effect | 2 weeks before |
| Vitamin E (high dose) | Bleeding (impairs clotting factors) | Moderate — RCTs, case reports | 2–4 weeks before |
| Fish Oil / Omega-3 | Bleeding risk lower than believed | High — large RCT, no clinical bleeding | 1–2 weeks (precaution) |
| Ginseng | Bleeding risk lower than believed | High — RCTs show no increased bleeding | 1–2 weeks (precaution) |
| Kava | Prolongs anesthesia / sedation | High — pharmacological evidence | 2 weeks before |
| St. John’s Wort | Accelerates drug metabolism (CYP450) | High — well-documented interactions | 2 weeks before |
| Valerian | Prolongs anesthesia / sedation | Moderate — potentiates CNS depressants | 1–2 weeks before |
| Ephedra / Ma Huang | Cardiovascular instability | High — FDA banned (2003) | Avoid entirely |
| Echinacea | Immune suppression; liver risk | Moderate — case reports | 2–3 weeks before |
| Ashwagandha | Potentiates sedation; BP changes | Low — limited surgical data | 2 weeks before |
| Resveratrol | Slows clotting; liver interactions | Low — mostly in vitro | 2 weeks before |
| CoQ10 | BP changes; unclear clotting effects | Low — conflicting data | 2 weeks before |
| Creatine | Kidney monitoring interference; may influence anesthetic depth | Low — 2025 review, no human surgical RCTs | 1–2 weeks before |
| NMN / NAD+ Boosters | Unknown surgical effects | Very low — safe in healthy adults but no surgical studies | 2 weeks before |
| Pre-Workouts | Undisclosed stimulants; CV risk | Moderate — stimulant dangers known | 2 weeks before |
| BCAAs | Blood sugar fluctuation | Very low — limited data | 2 weeks before |
| Bromelain | May help — reduces bruising | High — RCT in rhinoplasty patients | Discuss timing with surgeon |
| Arnica Montana | May help — reduces ecchymosis | Moderate — mixed but positive in rhinoplasty | Discuss timing with surgeon |
| Vitamin C | May help — collagen, wound healing | Moderate — meta-analysis for pain | Moderate doses; discuss with surgeon |
| Vitamin A | May help — tissue repair | Low — avoid high doses (toxicity) | Dietary amounts OK; no megadoses |
| Zinc | May help — immune, wound healing | Moderate — well-established role | Dietary amounts OK |
This table summarises what the published research says, but it’s not a replacement for personalised medical advice. Your specific health conditions, medications, and surgical plan may change these recommendations. Always follow the instructions you get directly from Dr. Bonaparte and his surgical team. And remember — bring all your supplement bottles to your consultation so the team can review every ingredient with you.
A thorough review looked at the 47 most popular supplements in the US and assessed each one for bleeding risk. The results? Garlic and hawthorn were the biggest concerns — strongly linked to surgical bleeding even if you’re not on blood thinners. In patients who are on anticoagulants, ginkgo biloba, turmeric, bilberry, chamomile, and melatonin were also associated with increased bleeding. Here’s the surprising part: the review found that fish oil, ginseng, and saw palmetto are NOT associated with increased bleeding — despite what many people (and even some doctors) still believe.
Hatfield J et al. Proc (Bayl Univ Med Cent). 2022;35(6):802–807 · PMID: 36304597
Garlic supplements contain compounds like ajoene and allicin that stop your platelets from sticking together — which sounds good for heart health, but is a real problem when your surgeon needs precise control over bleeding. This effect is strongly linked to surgical bleeding whether or not you’re on blood thinners. There are multiple case reports of prolonged bleeding and excess bleeding during operations in patients taking garlic supplements. The good news? Cooking with regular garlic in your food is generally fine — it’s the concentrated supplements that are the concern.
Refs: Hatfield 2022, Ang-Lee 2001
Ginkgo biloba affects how your platelets work, and there have been case reports linking it to serious bleeding events, including bleeding in the brain. That said, the evidence is a bit mixed — some controlled studies haven’t found significant bleeding when ginkgo is used alone. The risk seems to be highest when you’re combining it with other blood thinners or aspirin, so it’s best to stop it before surgery to be safe.
Refs: Hatfield 2022, Ang-Lee 2001
Those concentrated turmeric (curcumin) capsules can actually thin your blood through antiplatelet effects. If you’re also on blood thinners, the combination can increase bleeding risk even further. Turmeric supplements may also lower blood pressure and blood sugar, and can interact with many medications through their effects on liver enzymes. Good news though: cooking with turmeric spice in your food is totally fine — the concern is with the concentrated supplement capsules.
Refs: Hatfield 2022, Elvir Lazo 2024
Here’s one that might surprise you: fish oil is probably the most commonly stopped supplement before surgery, but the evidence has actually shifted quite a bit. Yes, fish oil does affect platelets in lab tests, but multiple large studies have shown this doesn’t translate to more bleeding in real patients. One major trial with over 25,000 participants found no extra bleeding risk at all. That said, most surgeons (Dr. Bonaparte included) still recommend stopping it as a precaution — rhinoplasty is delicate work, and it’s not worth the small chance.
Refs: Javaid 2024, Akintoye 2018
Several additional herbal products have been associated with bleeding risk at various evidence levels. Hawthorn is strongly associated with surgical bleeding independent of anticoagulant use. Ginger contains salicylate (aspirin-like compound) but evidence is conflicting. Feverfew, dong quai, red clover, bilberry, and cayenne have case reports or in-vitro data suggesting antiplatelet activity. Aloe vera and cordyceps sinensis are loosely associated with surgical bleeding. All should be disclosed to your surgical team and stopped at least 2 weeks before surgery.
Refs: Hatfield 2022, Broughton 2006
The foundational JAMA review on herbal medications and perioperative care identified eight commonly used herbs that pose specific concerns during surgery: echinacea, ephedra, garlic, ginkgo, ginseng, kava, St. John’s wort, and valerian. Complications arise from direct pharmacological effects, pharmacodynamic interactions (potentiation of sedation), and pharmacokinetic interactions (altered drug metabolism). A 2024 update confirmed that 50–70% of surgical patients fail to disclose their herbal medication use to physicians.
Ang-Lee MK et al. JAMA. 2001;286(2):208–216 · PMID: 11448284
Elvir Lazo OL et al. J Clin Anesth. 2024;95:111473 · PMID: 38613937
Kava is popular for anxiety and relaxation, but those same calming properties make it dangerous around surgery. It can seriously prolong the effects of anesthesia by amplifying sedative medications like benzodiazepines and barbiturates. It can also drop your blood pressure during surgery. The bottom line: if kava is in your cabinet, it needs to come out well before your rhinoplasty date.
Refs: Ang-Lee 2001, Stevinson 2002, Teschke 2009
St. John’s Wort is one of the most dangerous supplements to take before any surgery. It revs up certain liver enzymes (called CYP450) that break down drugs faster — including anesthetics, birth control, antidepressants, blood thinners, and pain medications. This can make your anesthesia and postoperative pain medication less effective or unpredictable, which is obviously a big problem during surgery. If you’re taking this, it’s one of the first things to stop.
Refs: Ang-Lee 2001, Zhou 2004
Valerian, commonly used as a sleep aid, potentiates the sedative effects of barbiturates and benzodiazepines, which are classes of drugs frequently used during anesthesia. It can make it more difficult for patients to wake from anesthesia and has been associated with irregular heart rhythms. Additionally, patients who use valerian long-term may experience withdrawal symptoms similar to benzodiazepine withdrawal if it is stopped abruptly.
Refs: Ang-Lee 2001, Elvir Lazo 2024
Ephedra is a powerful stimulant that can cause dangerous blood pressure and heart rate spikes, especially when combined with anesthesia. It was banned by the FDA in 2003 due to cardiovascular risks including heart attack and stroke. While no longer widely available as a standalone supplement, it may still appear in imported products, traditional Chinese medicine formulations, or older weight loss supplements. Any product containing ephedra or its alkaloids (ephedrine, pseudoephedrine) should be stopped well before surgery.
Refs: Ang-Lee 2001, Elvir Lazo 2024
Echinacea is commonly taken to support immune function, but long-term use may paradoxically suppress the immune system, which could impair postoperative healing and increase infection risk. It may also cause adverse effects when combined with anesthesia, particularly in individuals with liver disease, potentially contributing to hepatotoxicity. Echinacea is loosely associated with surgical bleeding independent of anticoagulant use.
Refs: Ang-Lee 2001, Hatfield 2022
Beyond the traditional herbals, a lot of patients today are taking newer anti-aging, fitness, and wellness supplements. Dr. Bonaparte doesn’t recommend or claim expertise in the usefulness of these products for their marketed purposes, but he can help you understand how they might affect your surgery. The biggest concern with most of these newer supplements is simply the unknown — how they affect your body under the stress of surgery and anesthesia just hasn’t been studied yet.
Ashwagandha is hugely popular for stress and sleep, but its calming effects are exactly what makes it risky before surgery. Those same relaxation properties can dangerously add to the sedation from anesthesia, making it harder to wake up safely. It may also lower your blood pressure and blood sugar — both things your anesthesiologist needs to keep tightly controlled. Some reports also suggest thyroid effects and rare liver issues.
Refs: Elvir Lazo 2024, Ang-Lee 2001
Resveratrol — the antioxidant famously found in red wine and grapes — may slow your blood’s ability to clot, which could mean more bleeding. It can also interact with medications processed by your liver and may have estrogen-like effects. While most of the data comes from lab studies rather than real-world clinical trials, the theoretical bleeding risk is enough to warrant stopping it before surgery.
Refs: Hatfield 2022, Broughton 2006
CoQ10 can lower blood pressure, which could interact with the blood pressure changes that naturally happen during anesthesia. What makes it tricky is that the evidence on blood clotting goes both ways — some studies say it may increase clotting (interfering with blood thinners like warfarin), while others suggest it could actually increase bleeding risk. That uncertainty alone is a good reason to stop it before surgery. It may also affect your blood sugar levels.
Refs: Wang 2016, Levy 2021 (SPAQI)
Creatine is generally safe for healthy gym-goers, but here’s the catch for surgery: it raises your blood creatinine levels, which is one of the key markers doctors use to check how your kidneys are doing after a procedure. If creatinine is already elevated from your supplement, it makes it much harder for your medical team to tell if your kidneys are actually OK. A 2025 review also found that creatine may influence anesthetic depth by modulating cellular energy stores and calcium handling — though clinical data in humans is still lacking. High doses can also affect your hydration and fluid balance, which matters during and after surgery.
Refs: Lehmeidi 2025, Levy 2021 (SPAQI)
NMN, NR (nicotinamide riboside), and other NAD+ boosters are gaining popularity in the longevity space. The honest truth? There’s almost zero safety data on how these affect you during surgery or under anesthesia. While clinical trials have shown NMN supplementation is generally well-tolerated in healthy adults for up to 12 weeks, nobody has studied how these interact with your body’s stress response, drug metabolism, or healing when you’re on the operating table. There are also quality control concerns, since these are relatively new products. When the data just isn’t there, the safest move is to stop.
Refs: Nadeeshani 2022, Fukamizu 2022
Pre-workout formulas are some of the riskiest supplements to take before surgery. Many are loaded with stimulants — mega-dose caffeine, bitter orange extract, synephrine, and sometimes ingredients chemically related to banned ephedra — that can send your heart rate and blood pressure through the roof during anesthesia. What makes them extra concerning is the “proprietary blend” problem: many brands don’t tell you exactly what’s in them or how much, making it impossible for your anesthesiologist to predict how they’ll interact with your medications.
Refs: Levy 2021 (SPAQI), Elvir Lazo 2024
BCAAs (leucine, isoleucine, valine) are popular for muscle recovery and growth. While generally considered safe — and actually studied as beneficial perioperative nutrition in major surgery settings — the primary concern for elective procedures is their potential to affect blood sugar regulation, which needs to be carefully managed during and after anesthesia. There is limited data on BCAA safety specifically in the cosmetic surgery perioperative setting.
Refs: Levy 2021 (SPAQI)
Most of the supplement guidance before rhinoplasty is about what to stop — but there are a few supplements that actually have research behind them showing they might help your recovery. The key thing to understand is that none of these should be taken without Dr. Bonaparte’s go-ahead, and timing really matters. Some have mild blood-thinning properties, so they should only be started after surgery and only when your surgeon clears you.
Bromelain has the best evidence of any supplement for reducing bruising after rhinoplasty. A 2025 double-blind, placebo-controlled trial (the gold standard of research) found that rhinoplasty patients who took bromelain had significantly less bruising on day 7 compared to those who took a placebo. A review of 29 studies also concluded that bromelain is well-supported for reducing swelling and pain after facial surgery.
One thing to be aware of: bromelain has mild blood-thinning properties, so the timing has to be coordinated with your surgeon. Don’t take it before surgery without approval, and avoid it if you have a pineapple allergy or are on prescription blood thinners.
In this double-blind trial, patients undergoing open preservation rhinoplasty with lateral osteotomy were randomised to bromelain or placebo. Bromelain significantly reduced ecchymosis on postoperative day 7 in both eyes compared to placebo. Serum fibrinolytic activity was increased and plasma fibrinogen levels decreased in the bromelain group, confirming its mechanism of action.
Rahmaty B et al. Aesthet Plast Surg. 2025 · PMID: 39904804
Arnica montana is one of the most popular remedies patients ask about for post-surgical bruising, and it actually has some specific evidence in rhinoplasty. A 2016 double-blind trial found that patients who took oral arnica after rhinoplasty with osteotomies (bone work) had their bruising clear up faster in both extent and intensity — which the researchers noted can make a real difference in patient satisfaction.
That said, when you zoom out and look at all surgery types, the results are more mixed. A meta-analysis of 18 trials found only a small overall effect. The evidence is strongest for facial procedures specifically, including rhinoplasty and facelifts. Interestingly, about 49% of facial plastic surgeons already routinely recommend arnica to their rhinoplasty patients.
In a prospective randomised, double-blind, placebo-controlled trial, rhinoplasty patients who received perioperative oral arnica montana demonstrated faster resolution of the extent and intensity of ecchymosis compared to placebo. The researchers used objective photographic measurement with computer analysis to quantify bruising.
Chaiet SR, Marcus BC. Ann Plast Surg. 2016;76(5):477–482 · PMID: 25954844
Vitamin E is one of the more consistent findings in the research — high doses are clearly linked to increased bleeding risk around surgery. It can interfere with your blood’s clotting ability and deplete vitamin K, which your body needs for proper clotting. Stop high-dose supplements at least 2–4 weeks before surgery. Your regular daily multivitamin that contains a small amount of vitamin E? That’s generally fine to continue.
Refs: Spencer 2006, Broughton 2006
Vitamin C is a key player in collagen production and wound healing, so it makes sense that patients ask about it. A meta-analysis of seven clinical trials (519 patients) found that taking vitamin C around surgery reduced pain scores and the amount of pain medication needed. However, a larger review of 37 trials didn’t find significant differences in hospital stay or other major outcomes, so it’s not a magic bullet.
Refs: Chen 2015, Knackstedt 2020
Some sources have raised concerns about very high doses possibly affecting scarring, though this is debated. The best approach? Eat plenty of fruits and vegetables throughout your recovery. If you want to take a supplement, talk to Dr. Bonaparte about the right dose — moderate amounts may be helpful after surgery, but megadoses (>1000 mg/day) before surgery should be avoided unless specifically approved.
This one is specifically important if you take warfarin (Coumadin). Vitamin K is essential for blood clotting and directly interacts with warfarin. The key here isn’t to avoid vitamin K — it’s to keep your intake consistent. Suddenly eating a lot more or a lot less vitamin K-rich foods can throw off your anticoagulation levels. And never stop taking warfarin without specific instructions from both the doctor who prescribed it and Dr. Bonaparte.
Vitamin A helps with wound healing by supporting new cell growth and collagen formation, but high doses can be toxic — getting it through your diet is the safest bet. Vitamin D supports your immune system and may help keep inflammation in check. If you’re deficient (which is pretty common here in Ottawa during the winter months), supplementation could be especially helpful. Zinc is critical for wound healing, immunity, and tissue repair. All three of these are best obtained through a balanced diet, with supplements only if you’re actually deficient or Dr. Bonaparte recommends them.
ARIA (Answering Rhinoplasty Inquiries Anytime) is Dr. Bonaparte’s AI-powered educational assistant, trained on peer-reviewed research. Available 24/7, ARIA can help you understand supplement safety, prepare for your consultation, and explore your options.
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