Supplements for Healing Sports Injuries: What Actually Works (and What Is Just Expensive Hope)

Nobody plans to get injured. But if you train hard enough for long enough, at some point you will find yourself sidelined, scrolling your phone, and suddenly every ad on Instagram is promising that some powder, pill, or peptide will get you back on the trail in half the time.

I have been coaching endurance athletes for years, and injury weeks are some of the most emotionally loaded check-ins I have. Just a couple of weeks ago I was on a call with one of my ultrarunners who was finally coming back from a foot issue that flared up on long descents. The relief in their voice when they said it was feeling better after weeks of careful management? That is the real prize. And the question that always comes up in some form during those weeks is the same one: “What should I be taking to heal faster?”

So let’s actually answer it. Not with influencer claims, but with the research. Some supplements have real evidence behind them for injury recovery. Some have interesting but early evidence. And one of the most hyped “healing” compounds on the internet right now has zero published human trials behind it. We will get to that one.

Before any supplement: you cannot out-pill under-eating

Here is the thing the supplement ads will never tell you: the biggest nutrition mistake injured athletes make is cutting calories too hard because they are training less. Your body is running a construction site. Tissue repair raises your energy needs, and eating too little slows healing and accelerates muscle loss. Reviews of muscle protection during injury, including work from a group involving researcher James Morton, whose work I follow closely, consistently point to adequate energy and protein as the foundation, with protein recommendations in the range of roughly 1.6 to 2.5 g per kg of body weight per day while injured (Wall, Morton & van Loon, 2015).

Caveat: those numbers come largely from muscle disuse studies in healthy young adults, often male, rather than injured endurance athletes specifically. Your exact target depends on your size, your injury, and how much training you are still able to do. But directionally, the message is clear: eat enough, and spread protein across the day.

If you take nothing else from this post, take that. It is free.

Collagen plus vitamin C: legit for tendons and ligaments, with caveats

This is the one I get asked about most, and it is also one I use with clients. The signature study here comes from Keith Baar’s lab: Shaw and colleagues gave participants 15 g of gelatin with about 50 mg of vitamin C one hour before six minutes of jump rope, and blood markers of collagen synthesis (PINP) roughly doubled compared to placebo (Shaw et al., 2017).

Now the caveats, because this is where influencers stop reading and I do not. That study was eight recreationally active young men. Eight. It measured a blood marker of collagen synthesis, not actual healing of an injured tendon. And the protocol matters: the gelatin was taken about an hour before loading exercise, because tendons and ligaments have poor blood supply and seem to need mechanical loading to pull those amino acids into the tissue. Collagen stirred into your coffee on a rest day is not the same intervention.

How I actually use this with athletes: 15 g of collagen or gelatin with vitamin C about 30 to 60 minutes before rehab work or loading exercise for the injured tissue. One detail from my own coaching this month that I think about a lot: I had a client heading into a big race who takes collagen and creatine daily, and we deliberately pulled both out of her race morning plan. Not because they are bad, but because race morning is for carbs and fluids, and collagen does nothing for you in that window. Right supplement, right job, right time.

Creatine: not just for the gym crowd, especially if you are immobilized

Endurance athletes still side-eye creatine, and I get it. But if you are in a boot or a cast, the evidence is worth knowing. In a classic study, Hespel and colleagues immobilized healthy young volunteers’ legs for two weeks, then followed them through ten weeks of rehab. The creatine group recovered muscle size and function faster than placebo (Hespel et al., 2001).

Caveats: this was disuse atrophy in healthy young people, not athletes recovering from surgery or a stress fracture, and creatine will not repair a tendon or knit bone. What it does is help protect and rebuild muscle while you cannot load it, which matters a lot for how fast you come back once you can train again. Standard dosing is 3 to 5 g of creatine monohydrate daily. Skip the fancy forms, monohydrate is the one with the evidence.

Omega-3s: promising for muscle protection, and the doses in studies are big

McGlory and colleagues gave healthy young women 5 g per day of omega-3 fatty acids for four weeks, then immobilized one leg for two weeks. The fish oil group lost less muscle than the control group (McGlory et al., 2019).

Caveats: young women only, a two week immobilization model, and 5 g per day is a lot more than the one capsule most people take. The broader omega-3 and muscle literature is genuinely mixed, so I file this under “reasonable to try if you are facing immobilization, with realistic expectations,” not under miracle.

Bone injuries: vitamin D and calcium do the quiet work

For stress fractures and bone stress injuries, the flashiest option is rarely the right one. In one of the biggest trials in this space, around 5,200 female Navy recruits were randomized to 2,000 mg of calcium plus 800 IU of vitamin D daily or placebo during basic training, and the supplement group had roughly 20 percent fewer stress fractures (Lappe et al., 2008).

Caveats: military recruits under sudden, extreme training loads are not masters marathoners, and this was prevention rather than treatment. But bone healing needs calcium and adequate vitamin D status, and low vitamin D is common in endurance athletes, especially if you train early mornings, live at northern latitudes, or are indoors all winter. Testing your level beats guessing. This is exactly the kind of thing we look at in bloodwork with 1-on-1 clients.

Now the hot take: BPC-157 and the healing peptide hype machine

If you have spent any time in the corners of the internet where guys with podcasts talk about “biohacking,” you have heard of BPC-157, the so-called healing peptide. Influencers describe it like a cheat code for tendon injuries.

Here is what the actual evidence base looks like: the impressive healing results are from rodent studies, there are no published peer-reviewed human clinical trials demonstrating it is safe or effective, and it is prohibited in sport by WADA, with USADA explicitly warning athletes off it (USADA, 2023). Products sold online as BPC-157 are unapproved drugs with no quality oversight, so you do not even know what is in the vial.

So the honest comparison is this: collagen with vitamin C has a small human trial and a plausible mechanism. Creatine has decades of human safety data and immobilization trials. BPC-157 has rat studies, a ban list entry, and a great marketing budget. When someone whose income depends on selling you peptides tells you the science is “already there,” that is not science, that is a sales funnel. This is the injustice in sports nutrition that drives me up a wall: injured athletes are the most vulnerable customers on earth, and the industry knows it.

And while we are being contrarian: more antioxidants are not automatically better either. High dose vitamin C and E supplementation (1,000 mg C plus 235 mg E daily) actually blunted cellular endurance training adaptations in a randomized trial (Paulsen et al., 2014). Caveat: that was healthy trained and untrained young adults, not injured athletes, and normal food doses of vitamin C, or the roughly 50 mg used in the collagen protocol, are a completely different situation from megadosing. I do use short term higher dose vitamin C with athletes in specific situations, like illness prevention around heavy travel, but chronic megadosing “for recovery” is not supported.

What I would actually put in the cart

If you are injured and want the evidence-backed short list, here it is. Instead of sending you to Amazon, every link below goes to our Fullscript portal. Create a free account through our link and you get 20 percent off anything in the database, always. We carry practitioner grade, third party tested brands like Thorne, Momentous, Pure Encapsulations, Metagenics, and others, which matters a lot if you are drug tested:

• Collagen peptides: we suggest Thorne or Momentous collagen peptides, 15 g with vitamin C before rehab loading. Grab it from our Fullscript portal here.
• Creatine monohydrate: we recommend Thorne Creatine, 3 to 5 g daily. Get it in our Fullscript portal.
• Omega-3 fish oil, if you are facing immobilization: look at the Thorne, Pure Encapsulations, or Metagenics omega-3 lines. Find them in our Fullscript portal.
• Vitamin D3, ideally dosed off a blood test: browse our Fullscript portal.
• A quality protein powder to help hit daily protein targets, like Momentous whey: find it in our Fullscript portal.

What is not on the list: peptides, megadose antioxidant stacks, and anything marketed with the phrase “wolverine healing.”

Heal like it is your job

Injury recovery nutrition is one of the most individual things we do with athletes. Your energy needs, your protein targets, the supplements worth your money, and the ones that are just expensive urine all depend on your body, your injury, and your sport. If you want a plan built around your actual situation instead of an influencer’s affiliate code (yes, I see the irony, mine are labeled), apply for 1-on-1 coaching here.

And if you are not ready for coaching, grab our free nutrition guides and resources, and check out our conversation with pro trail runner Dani Moreno about how elite athletes recover and optimize after injury.

Heal smart. The trail will still be there.

References

• Hespel, P., Op’t Eijnde, B., Van Leemputte, M., et al. (2001). Oral creatine supplementation facilitates the rehabilitation of disuse atrophy and alters the expression of muscle myogenic factors in humans. The Journal of Physiology, 536(2), 625-633. https://pubmed.ncbi.nlm.nih.gov/11600695/
• Lappe, J., Cullen, D., Haynatzki, G., Recker, R., Ahlf, R., & Thompson, K. (2008). Calcium and vitamin D supplementation decreases incidence of stress fractures in female Navy recruits. Journal of Bone and Mineral Research, 23(5), 741-749. https://pubmed.ncbi.nlm.nih.gov/18433305/
• McGlory, C., Gorissen, S. H. M., Kamal, M., et al. (2019). Omega-3 fatty acid supplementation attenuates skeletal muscle disuse atrophy during two weeks of unilateral leg immobilization in healthy young women. The FASEB Journal, 33(3), 4586-4597. https://faseb.onlinelibrary.wiley.com/doi/abs/10.1096/fj.201801857RRR
• Paulsen, G., Cumming, K. T., Holden, G., et al. (2014). Vitamin C and E supplementation hampers cellular adaptation to endurance training in humans: a double-blind, randomised, controlled trial. The Journal of Physiology, 592(8), 1887-1901. https://physoc.onlinelibrary.wiley.com/doi/abs/10.1113/jphysiol.2013.267419
• Shaw, G., Lee-Barthel, A., Ross, M. L., Wang, B., & Baar, K. (2017). Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis. The American Journal of Clinical Nutrition, 105(1), 136-143. https://academic.oup.com/ajcn/article-abstract/105/1/136/4569849
• USADA (2023). BPC-157: Experimental peptide creates risk for athletes. https://www.usada.org/spirit-of-sport/bpc-157-peptide-prohibited/
• Wall, B. T., Morton, J. P., & van Loon, L. J. C. (2015). Strategies to maintain skeletal muscle mass in the injured athlete: nutritional considerations and exercise mimetics. European Journal of Sport Science, 15(1), 53-62. https://pubmed.ncbi.nlm.nih.gov/25027662/