Eating for Tendon Health: Protein, Vitamin C and Timing

A tendon is the tough cord that joins muscle to bone. Your rotator cuff tendons, which sit around the shoulder joint, are loaded every time you lift, reach or carry. Many clinicians suggest tendons adapt to gradual load, and the muscles that pull on them need to be strong enough to share the work.

Food does not build tendons on its own. It supports the muscles that do the work, which is why nutrition and exercise are usually discussed together.

For healthy older adults, the ESPEN expert group suggests at least 1.0 to 1.2 grams of protein per kilogram of body weight a day. It suggests 1.2 to 1.5 grams if you are ill or at risk of malnutrition. It also recommends daily physical activity, including resistance exercise, for all older people [R09].

The Australian and New Zealand sarcopenia guidance is similar in direction. It says resistance exercise is the first-line approach, and protein helps mainly when combined with it. It suggests considering 1 to 1.5 grams per kilogram a day for older adults with sarcopenia, except those with significant kidney disease [R08].

On vitamins and supplements, the US National Center for Complementary and Integrative Health describes the evidence as insufficient for many supplements, and mixed for others [R20]. An older review of antioxidant and anti-inflammatory supplements found the authors could not recommend vitamin E, ginger, turmeric or omega-3 for osteoarthritis, based on evidence up to 2009 [R22]. We could not find a source in this bank that shows vitamin C speeds tendon repair in people (evidence varies, ask your clinician).

Whole-diet patterns, such as Mediterranean and plant-based eating, are linked to less pain and better function in osteoarthritis. The word "linked" matters here. It does not mean proven [R21]. An anti-inflammatory diet complements treatment; it does not replace it [R23].

1. Eat enough protein across the day. Spread it over meals, using eggs, fish, dairy, legumes, tofu or lean meat. Your needs depend on your body and health, so check the numbers with a dietitian or doctor if you are unsure.
2. Get vitamin C from food. Fruit and vegetables such as peppers, berries and citrus are good sources. Food is the lower-risk route.
3. Pair food with movement. Protein helps most when combined with resistance exercise [R08]. Seated or standing strength work is a practical place to start.
4. Eat regular meals. Steady meals are easier to keep up than strict timing rules, and the evidence for timing tricks is weak.
5. Be careful with supplements. If you take supplements, talk to your pharmacist or doctor first. This matters most if you take blood thinners or other medication.