Soft-Tissue Injury Recovery: 4 Compounds That Support Healing + 5 to Cut

Four compounds, each tied to a phase of healing, each with a brand we'd actually buy. Below: what to take, when to start it, and what to pull out of whatever you're taking now.Stack-kit editorial

The short version, before the dense part: a muscle tear, a strained tendon, or a sprained ligament heals on a clock, and the right supplement at the wrong moment on that clock does nothing. This page is about getting four things in at the right moment — and about the five things you can stop buying today.

Here's the trap. A torn hamstring, an inflamed Achilles, and a rolled ankle are not the same injury, but the supplement aisle treats them like one. The "recovery" shelf is mostly built on research about cartilage breakdown, post-surgical patients, and general wellness — then sold into every soft-tissue situation that walks in. So we scoped this hard, to the four things the evidence actually backs for muscle, tendon, and ligament: collagen precursors timed to the moment you load the tissue, omega-3 to keep inflammation from overshooting, bromelain for the acute swelling, and creatine to defend the muscle you'd otherwise lose sitting on the couch.

Quick Answer

The protocol: Hydrolyzed collagen peptides (15g) + vitamin C (48–200mg) co-administered 30–60 minutes before any physical therapy or controlled loading — the pairing is the mechanism, not two separate items. Omega-3 EPA+DHA at 2–3g/day starting day 1. Bromelain 500–1000mg on empty stomach, acute through day 21. Creatine monohydrate 5g/day from day 3 through full return-to-training.

Key caveat: Do not front-load collagen in the first 72 hours. Acute inflammation is a repair-signaling event — fibroblasts need to be primed before the substrate is useful. (Fibroblasts: the cells that actually lay down new connective tissue. Substrate: the raw material they build with.) Starting too early doesn't speed healing; it just wastes product.

Cost: ~$130–180 for an 8-week run. Buy individual items, not a "recovery complex" bundle — bundled products are uniformly under-dosed across all four compounds.

Before you buy anything — rule out injuries that need care

Plain version: supplements belong downstream of diagnosis and load management. Do not use this page to self-manage a suspected fracture, tendon rupture, major tear, infected wound, or neurological injury.

Get urgent medical evaluation for deformity, inability to bear weight, a pop followed by immediate weakness, suspected Achilles or biceps tendon rupture, rapidly worsening swelling, severe bruising, numbness, tingling, new weakness, loss of pulse or color change, fever/redness/warmth spreading from the injury, open wounds, head/neck/back trauma, or pain that is severe, one-sided, and not improving. Those are not supplement problems.

If a clinician has already diagnosed a soft-tissue injury and given you a rehab plan, the stack below can support the phases of that plan. It does not replace imaging, bracing, physical therapy, surgery when indicated, or a return-to-sport decision.

The Protocol — Detailed

The Protocol — Phase by Phase

Think of recovery as three stretches of road, not one. Each stretch puts a different compound in the driver's seat:

Notice the order. The collagen doesn't lead — it can't, yet. The first 72 hours belong to managing the inflammatory wave, and only once the repair cells wake up does the building material earn its place. The single most common mistake we see is people doing this backwards.

Compound 1 — Hydrolyzed Collagen Peptides + Vitamin C

The headline: this is the building-material pair, and the trick is taking it right before you load the tissue, not whenever you remember to.

Mechanism

Tendons, ligaments, and muscle connective tissue matrix are composed predominantly of type I and type III collagen. Following soft-tissue injury, fibroblasts migrate into the damage zone and enter a synthesis-active state starting around day 3–5. At that point the bottleneck moves: it's no longer about getting the signal to repair, it's about having enough raw material on hand. Specifically, the fibroblasts need glycine, proline, and hydroxyproline in sufficient concentration at the moment of mechanical load to drive collagen output.

That's what hydrolyzed collagen peptides supply — the precursor pool. And the timing isn't a nicety. Peak plasma amino acid concentration lands roughly 60 minutes after you take it (in plain terms: the building blocks crest in your blood about an hour later), and collagen synthesis is mechanosensitive — it fires only when both the raw material and the mechanical load show up in the same window. So taking it before PT or a loading session is the whole point, not a casual "best used as."

Vitamin C isn't optional here, and this is where a lot of collagen routines quietly fail. Two enzymes — prolyl hydroxylase and lysyl hydroxylase — do the job of hydroxylating proline and lysine in the procollagen chain, and they can't run without ascorbate (vitamin C) sitting in as a required co-factor. Skip the C and the collagen your body lays down comes out structurally weak. The 48mg in Shaw 2017 is a threshold for having enough enzyme fuel — not a case for megadosing.

Dose + Timing

15g hydrolyzed collagen peptides + 48–200mg vitamin C, taken together 30–60 minutes before any physical therapy session, controlled loading exercise, or deliberate movement in the injury zone. Don't take it alongside a protein-rich meal — the competing amino acids in portal circulation flatten the peak you're trying to hit. Start at subacute onset (day 3–5). For this job, daily dosing beats acute high-dose loading.

Brands

Collagen: Momentous Collagen Peptides — NSF Certified for Sport (verify current certification on the collagen SKU; Momentous's protein line is confirmed NSF-certified). Unflavored, 15g/scoop, ~$45 / 30 servings. If the NSF certification on the collagen isn't confirmed, go to Great Lakes Wellness Hydrolyzed Collagen (Informed Sport certified, grass-fed, ~$38 / 28 servings).

Vitamin C: Thorne Vitamin C, 250mg capsule, NSF Certified, ~$18 / 90 capsules. Plain ascorbic acid is plenty. Don't pay up for "buffered" or "ester-C" versions for this purpose — at these doses the bioavailability difference (how much of the dose actually reaches your bloodstream) isn't clinically meaningful. And if your multivitamin already drops 100mg+ vitamin C in the same window as your collagen, that counts — no need to double up.

Study

Shaw G, Lee-Barthel A, Ross ML, Wang B, Baar K. "Vitamin C–enriched gelatin supplementation before intermittent activity augments collagen synthesis." Am J Clin Nutr. 2017;105(1):136–143. N=8, double-blind crossover. 15g gelatin + 48mg vitamin C consumed pre-exercise increased P1NP (a collagen synthesis marker) approximately 3× vs. placebo at 1-hour post-exercise. Functional endpoint: Praet SFE et al., Nutrients 2019;11(1):76 — N=44, 6-month RCT; collagen group showed significantly improved Achilles tendon structure on ultrasound vs. exercise-only control.

When to Skip

Hold it entirely in the first 72h post-injury. Beyond that: a dairy or bovine protein allergy is a problem, since most hydrolyzed collagen is bovine-derived (marine collagen is an alternative, but less studied at this protocol's dose and timing). If you avoid animal products for vegan or religious reasons, know that plant-based collagen precursors have no direct RCT evidence at this dose — we'd flag that gap rather than substitute something silently. And with chronic kidney disease, the extra amino acid load warrants a prescriber's review first.

Compound 2 — Omega-3 Fatty Acids (EPA + DHA)

The headline: fish oil that's dosed high enough to actually steer your inflammation — and to protect muscle while you're not using it.

Mechanism

EPA and DHA compete with arachidonic acid for cyclooxygenase (COX) and 5-lipoxygenase binding, nudging prostaglandin and leukotriene production toward less inflammatory eicosanoids — PGE3 instead of PGE2, LTB5 instead of LTB4. In an acute injury, that takes the top off an overshooting inflammatory response without the blunt, broad-spectrum COX shutdown you get from NSAIDs — which matters, because the prostaglandins that recruit your early fibroblasts live in that same pathway. You don't want to carpet-bomb the signal you're depending on. There's a second payoff: omega-3 also appears to support muscle protein synthesis during stretches of reduced loading — exactly the disuse problem you're fighting while injured.

Dose + Timing

2–3g combined EPA+DHA per day, taken with food (the dietary fat improves micellar absorption — basically, fat helps you absorb it). Split it into two doses if your stomach is sensitive. Begin day 1 and carry it through every phase. One expectation to set: this is anti-inflammatory over days to weeks, not a painkiller. Don't wait for an acute "ahh" effect — that's not what it does.

Brand

Nordic Naturals Ultimate Omega — IFOS 5-star certified, 1280mg EPA+DHA per 2 softgels. Four softgels daily gets you to the 2.5g target. ~$45 / 60 softgels. The IFOS certification is the signal worth caring about here: rancid fish oil is genuinely common at the cheaper end, and oxidized lipids add to your inflammatory load instead of cutting it — the opposite of what you bought it for. Easy gut check at purchase: fresh fish oil is nearly odorless. If the bottle hits you with a strong fishy smell, it's already oxidized.

Study

Smith GI et al. "Dietary omega-3 fatty acid supplementation increases the rate of muscle protein synthesis in older adults." Am J Clin Nutr. 2011;93(2):402–412. N=16, 3.36g EPA+DHA/day vs. corn oil, 8 weeks; muscle protein fractional synthetic rate increased significantly (P=0.001). COX/LOX competitive substrate mechanism: Calder PC. Biochem Soc Trans. 2017;45(5):1105–1115 — well-characterized enzymatic mechanism across multiple RCTs.

When to Skip

On anticoagulant or antiplatelet therapy (warfarin, rivaroxaban, apixaban, clopidogrel)? EPA+DHA at this dose carries mild antiplatelet activity, so talk to your prescribing physician before adding it. Fish or shellfish allergy? Algae-derived omega-3 (Ovega-3, ~$30 / 60 softgels, same EPA+DHA profile) is a clean swap. And if you're already eating 3+ servings of fatty fish a week, you're probably hitting the target through diet — track it for a week before you buy a product you may not need.

Compound 3 — Bromelain

The headline: a pineapple-derived enzyme for the early swelling and stiffness — and the one compound you'll deliberately phase out.

Mechanism

Bromelain is a proteolytic enzyme complex extracted from pineapple stem ("proteolytic" just means it breaks down proteins). Taken orally, some of it is absorbed intact and works systemically three ways: it inhibits prostaglandin E2 synthesis, it interferes with fibrin piling up at the injury site, and it dials down bradykinin-mediated pain signaling. What we're after with it is narrower than people assume — edema reduction and getting range of motion back in the first 5–14 days. And unlike NSAIDs, its COX modulation is narrower, so it's less likely to broadly suppress the prostaglandins that recruit your early fibroblasts. Same logic as the omega-3: protect the repair signal.

Dose + Timing

500–1000mg, standardized to 2400 GDU/g enzyme activity, 2–3× daily on an empty stomach. (That GDU number is the potency rating — ignore products that don't print it.) Food degrades the enzyme, so take it 45–60 minutes before meals or 2+ hours after. Run it acute through subacute, days 1–21. Then taper to once daily in week 3 and discontinue by day 28 — unless the inflammation is still clinically significant, in which case there's a reason to hold.

Brand

NOW Foods Bromelain 2400 GDU — GMP certified, 500mg/capsule at 2400 GDU/g standardization, ~$15 / 120 capsules. GDU (gelatin digestion units) is the quality marker that matters. A product that lists only milligrams with no enzyme-activity number can't be judged for potency — there's no way to know what you're actually getting. Don't substitute it.

Study

Kamenicek V et al. "Systemic enzyme therapy in the treatment and prevention of post-traumatic and postoperative swelling." Acta Chir Orthop Traumatol Cech. 2001;68(1):45–49. N=80; systemic enzyme therapy including bromelain reduced edema and restored range of motion significantly faster vs. control (p<0.05). Walker AF et al. "Bromelain reduces mild acute knee pain and improves well-being in a dose-responsive, double-blind, placebo-controlled study." Phytomedicine. 2002;9(8):681–686. N=77; dose-responsive effect on pain VAS at 400mg/day vs. placebo (p<0.05).

When to Skip

A pineapple allergy or latex-fruit syndrome rules it out (cross-reactivity risk). On active anticoagulant therapy, remember it stacks an additive antiplatelet effect on top of the omega-3 in compound 2 — get physician review if you're on warfarin or direct oral anticoagulants. Surgery scheduled within 7 days? Discontinue. And with a history of peptic ulcer or GI bleeding, you've got two options: take it with food (which protects the stomach lining but cuts the systemic absorption you wanted) or skip this compound entirely.

Compound 4 — Creatine Monohydrate

The headline: yes, the gym supplement — but here it's doing a different job, which is keeping the muscle you can't train right now.

Mechanism

This is a muscle-preservation play, not a performance one. When an injury cuts your training load, you start losing muscle to disuse atrophy — driven by less mechanical loading, less satellite cell activity, and a protein balance that tips net-catabolic (your body breaking down more than it builds). Creatine taken during immobilization holds onto intramuscular phosphocreatine stores, keeps myogenic regulatory factor expression up (MRF4, myogenin), and slows the atrophy rate even without an exercise stimulus. And here's why it's worth the slot: how fast you get back to training is shaped directly by how much lean mass you didn't lose during the layoff.

Dose + Timing

5g/day monohydrate, no loading phase. Take it any time of day, with food or liquid. Start at subacute onset (day 3–5). Keep it going through full rehabilitation and the first 4–6 weeks of return-to-training. Don't cycle off — continuous use at 5g/day has a robust safety record across multi-year time horizons.

Brand

Klean Athlete Creatine Monohydrate — NSF Certified for Sport, 5g/scoop unflavored, ~$35 / 60 servings. For the athletic-injured population, NSF Certified for Sport is the certification tier that counts, because contamination risk affects competition eligibility. Skip the premium forms — creatine ethyl ester, Kre-Alkalyn, HCl. At 5g/day their bioavailability edge over monohydrate isn't clinically meaningful, and not one of them carries the immobilization-and-atrophy evidence base that plain monohydrate does. You'd be paying more for less proof.

Study

Hespel P et al. "Oral creatine supplementation facilitates the rehabilitation of disuse atrophy and alters the expression of muscle myogenic factors in humans." J Physiol. 2001;536(Pt 2):625–633. N=22, arm immobilization model; creatine group preserved significantly more muscle cross-sectional area vs. placebo (−3% vs. −7.5% CSA loss) and showed upregulated MRF4 and myogenin expression.

When to Skip

Renal insufficiency or chronic kidney disease is the clear stop sign: supplementation pushes up creatinine, which muddies your lab interpretation and adds filtration load — get prescriber sign-off. Same goes for any pre-existing renal pathology. And if you compete in a tested sport, check your governing body's current position — creatine isn't prohibited by WADA, but some national federations write their own rules.

What to Cut — and Why

Five things that keep showing up in athlete recovery stacks and have no business in this one.

Glucosamine and chondroitin. These are cartilage matrix precursors, and the modest evidence behind them lives in osteoarthritis — a chronic cartilage-degeneration condition. Soft-tissue injuries (muscle, tendon, ligament, fascia) are a different tissue class with a different repair mechanism entirely. Glucosamine and chondroitin do nothing for collagen synthesis in tendons or ligaments. Cost without benefit, here.

Internal arnica supplements. Topical arnica has some evidence for bruising and superficial soft-tissue contusion. The oral systemic version has no RCT evidence for soft-tissue healing — and the homeopathic oral preparations on the shelf sit below any pharmacologically active dose. Skip.

"Recovery complex" multi-ingredient packs. Do this once: put the label of any commercial recovery complex next to the doses on this page. Collagen peptides show up at 3–5g (you need 15g). Bromelain at 50mg (you need 500–1000mg at standardized GDU). Vitamin C at 30mg (you need 48–200mg, co-timed with the collagen). This isn't sloppy formulation — it's arithmetic. Therapeutic doses of four compounds can't fit a capsule count anyone wants to swallow or pay for. Buy the items separately.

Collagen products without co-administered vitamin C. Collagen peptides taken without vitamin C in the same absorption window are missing the enzymatic co-factor that lets procollagen get hydroxylated — see compound 1. If you're already taking a standalone collagen, you're paying for precursors your body can't fully use. Fix the timing and add the co-dose; don't throw out the collagen.

Chronic NSAID co-use past day 7. Ibuprofen or naproxen in the first 72h for acute pain is a defensible call. Carrying NSAIDs through the subacute and rehab phases is a different story — the prostaglandins those drugs suppress are part of the fibroblast-recruitment and tendon-healing signal. Human data (Warden SJ, J Orthop Sports Phys Ther 2010) and animal models both suggest COX inhibition during the proliferative phase may delay tendon repair and leave you with lower-quality tissue. If you still need pain control past day 7, make it a deliberate conversation with your physician about the tradeoff — not a default refill.

FAQ

How long before I notice any effect from the collagen protocol?

Collagen synthesis markers (P1NP) move within hours of a correctly-timed dose in controlled studies — but a measurable structural change in a tendon or ligament takes weeks. The RCTs that showed functional improvement in Achilles tendinopathy mostly ran 6–12 weeks. So if your injury is subacute, plan to be consistent for 6–8 weeks before you judge tendon or ligament quality. Edema and range of motion — bromelain's lane — can respond inside 1–2 weeks.

Can I just take collagen protein powder instead of hydrolyzed collagen peptides?

No, and the reason is absorption speed. Intact collagen protein has to be digested before its amino acids reach systemic circulation. Hydrolyzed collagen peptides (molecular weight 2–5 kDa) absorb faster and peak in plasma within 30–60 minutes — which is the exact window the whole protocol hangs on. Standard collagen protein doesn't reproduce that timing.

I'm taking ibuprofen for pain. Should I stop before starting this protocol?

In the first 72h, managing pain is a reasonable priority — keep it. The concern with chronic NSAID co-use kicks in at day 7+, especially in tendon injuries, where the prostaglandin signal being suppressed is part of the repair cascade. Have that conversation with your treating clinician, pointing at the specific tissue type and injury timeline. This is not a blanket "stop your NSAIDs" instruction.

Is this protocol relevant for tendinopathy (chronic tendon irritation) or only acute injury?

The collagen + vitamin C piece has direct evidence in chronic tendinopathy — the Praet 2019 Achilles tendinopathy RCT ran a full 6 months. Bromelain is mostly an acute-phase tool and matters less for chronic presentations. Omega-3 and creatine (if you've cut training load significantly) both still apply. The phase structure shifts, but the core protocol holds.

Do I need all 4 compounds, or can I start with just collagen?

Depends where you are on the clock. First 72h: start with omega-3 — collagen adds nothing yet, because the fibroblasts aren't primed. From day 3, the collagen + vitamin C pairing is your highest-leverage item and the one to prioritize if money is tight. Bromelain comes next if swelling and range of motion are what's holding back your rehab. Creatine enters the picture once the injury is costing you more than 2 weeks of training.

Why creatine for an injury? I thought that was a gym supplement.

The thing that makes creatine earn its place here is atrophy prevention during immobilization or sharply reduced training load. The Hespel 2001 arm-immobilization study measured muscle cross-sectional area during forced disuse specifically — not exercise performance. Sidelined from normal training for 2+ weeks, lean-mass loss becomes a real recovery cost that stretches your return-to-baseline timeline. Creatine is one of the few compounds with direct evidence in that exact situation.

Affiliate Disclosure

Stack-kit is a brand-agnostic supplement protocol publication. We earn affiliate commission when you purchase products through links on this page. Brands earn placement in our protocols through evidence quality and third-party testing standards — not by paying for inclusion. Protocol recommendations are not updated by brand relationships; if a brand's certification status changes or a higher-evidence option becomes available, the protocol updates accordingly. We flag current certification status where it requires real-time verification (e.g., Momentous collagen NSF status) rather than asserting certainty we can't guarantee at time of reading.