When someone is injured and sees a physiotherapist, the conversation usually covers exercises, rest, manual therapy, and return-to-activity timelines. What rarely comes up is what they’re eating.
Tissue repair runs on raw materials that come from your diet. The biggest lever is protein — roughly 1.6 to 2.0 g per kg of bodyweight daily, spread across three to four meals. Vitamin C and glycine support collagen synthesis for tendons and ligaments; omega-3s support a healthy inflammatory response; vitamin D and calcium matter specifically for fractures. None of this replaces physiotherapy — it removes a limiting factor most people don’t know they’re dealing with.
This is a gap. The raw materials for tissue repair — whether muscle, tendon, ligament, or bone — come from the diet. Without an adequate supply of the specific nutrients involved in healing, the repair process is slower, less complete, and more susceptible to complications.
That doesn’t mean nutrition replaces physiotherapy. It means optimising what you eat while rehabilitating can meaningfully accelerate the process physiotherapy is directing — which is why nutrition sits alongside exercise and manual therapy as one of the pillars of a serious rehab programme, not an afterthought bolted onto it.
The Phases of Tissue Healing, and Why Nutrition Matters at Each One
Tissue healing runs through three overlapping phases: inflammatory, proliferative, and remodelling.
The inflammatory phase starts immediately after injury and lasts roughly three to five days. Despite the uncomfortable symptoms, inflammation is a controlled biological process that clears damaged tissue and signals repair to begin. This phase needs adequate zinc and vitamin C, both of which support immune function and early inflammatory signalling. Omega-3 fatty acids from fatty fish, walnuts, and flaxseed have a nuanced relationship here: they support a healthy inflammatory response without promoting excessive or prolonged inflammation.
The inflammatory phase serves a necessary biological purpose. Aggressively suppressing it with anti-inflammatory drugs in the first days after injury can actually impair healing — the goal with nutrition is to support a well-regulated response, not eliminate inflammation entirely.
The proliferative phase runs from roughly day three to three weeks post-injury — this is where new tissue gets laid down. Fibroblasts produce collagen to rebuild the extracellular matrix of tendons, ligaments, and connective tissue, while muscle satellite cells proliferate to repair damaged fibres. This phase depends heavily on protein, vitamin C, and specific micronutrients.
The remodelling phase begins around three weeks and can continue for months, sometimes years, in significant injuries. The collagen laid down earlier is initially disorganised; over time, with appropriate loading, it reorganises into stronger, more aligned structures — which is exactly where progressive loading through sports injury rehab or reformer-based work does its job. Protein remains critical here, alongside copper and vitamin D.
Protein: The Single Most Important Variable
Protein is the primary structural component of every tissue that needs repairing after injury. Without enough of it, new tissue synthesis is limited no matter what else is done correctly.
Injury increases protein requirements above baseline. For a person weighing seventy kilograms, that 1.6 to 2.0 g/kg range works out to 112 to 140 grams of protein daily. Most people on a typical diet don’t get there, particularly when injury has dulled their appetite or when they’ve mistakenly cut food intake just because they’re moving less.
Distribution across the day matters too. Spreading intake across three to four meals of twenty-five to forty grams each gives more consistent stimulation of muscle protein synthesis than loading it into one or two big meals. Good sources: eggs, chicken, fish, lean red meat, dairy including milk, yogurt, and paneer, legumes like lentils, chickpeas, and black beans, and soy products like tofu and tempeh. Protein supplements — whey or plant-based — are a legitimate way to hit targets when food volume alone makes it difficult.
Collagen Synthesis: Vitamin C and Glycine
Collagen is the most abundant structural protein in the body and the main component of tendons, ligaments, cartilage, and the connective tissue within muscle. Tendon and ligament injuries specifically need significant collagen synthesis to repair.
Two nutritional factors support this directly. Vitamin C is essential for the enzymatic processes that cross-link collagen fibres into a functional structure — without enough of it, the collagen produced is weaker and less organised. Good sources include citrus fruits, guava, amla, capsicum, tomatoes, and dark leafy vegetables.
Glycine, an amino acid abundant in collagen itself, matters too. The body can synthesise it, but not always enough to meet the elevated demands of significant injury repair. Bone broth is the richest dietary source; glycine is also available as a supplement with a good safety profile. There’s emerging evidence that consuming a glycine-containing food or supplement about sixty minutes before an exercise or loading session — when collagen synthesis is stimulated by mechanical load — enhances the anabolic response. Worth building into a rehab nutrition plan for tendon or ligament injuries.
Anti-Inflammatory Nutrients: What the Evidence Actually Shows
Omega-3 fatty acids from fatty fish, fish oil, flaxseed, and walnuts genuinely affect inflammatory signalling, reducing production of pro-inflammatory eicosanoids. The evidence for omega-3 supplementation reducing muscle soreness and improving recovery from exercise-induced muscle damage is fairly consistent.
Curcumin, the active compound in turmeric, has anti-inflammatory properties backed by a growing body of evidence. The catch is bioavailability — curcumin from food alone is poorly absorbed. Supplements formulated with piperine, a compound from black pepper that significantly boosts absorption, produce more meaningful blood concentrations.
Vitamin D, Calcium, and Bone Healing
For fractures and stress fractures specifically, vitamin D and calcium are the primary nutritional considerations — relevant well beyond the injury itself, since the same bone-health principles apply throughout post-surgery rehab involving hardware or grafts. Vitamin D is required for calcium absorption from the gut, and calcium is the primary mineral component of bone; deficiency in either impairs fracture healing.
Vitamin D deficiency is prevalent in India despite high sunlight exposure, largely because melanin in darker skin reduces cutaneous vitamin D synthesis. A blood test is the only way to actually know your status — supplementation at 1,000 to 4,000 IU per day is commonly recommended for deficient individuals, under medical guidance. This is directly relevant to fracture rehab, where bone-forming nutrition is as much a part of the timeline as the loading programme itself. Calcium-rich foods include dairy, dark leafy greens, sesame seeds, and almonds — meeting requirements through food is preferable to supplementation where possible.
