William Li: Foods that may protect muscle and energy as you age
Losing muscle and energy with age may not be inevitable, and food plays a real role.
What this episode covers
- Muscle strength and energy often fade with age, but they are not fully out of your control.
- The strongest levers are regular resistance exercise and a nutrient-dense diet with enough protein.
- On top of that base, certain polyphenol-rich foods, including pomegranate and walnuts, contain compounds that some gut microbiomes can convert into urolithin A, which may help refresh how cells make energy.
- Omega-3 fats, especially EPA and DHA from oily fish, may add modest support for muscle, particularly alongside strength training.
- The food effects seen in trials are real but modest, and matter most as small gains that add up over years.
Confidence in this episode
Everything about how much to believe this episode, in one place.
A healthy diet and exercise for preserving muscle are broadly supported, but the specific urolithin-A and mitochondrial-food claims are emerging and based on small, short trials.
- Resistance exercise and a nutrient-dense, adequate-protein diet are well supported for protecting muscle with age.
- Urolithin A has improved some mitochondrial biomarkers and measures of muscle function in small human trials.
- Omega-3 trials in older adults suggest possible modest benefits for muscle function, especially alongside resistance training, though results are not uniform.
- How much the specific mitochondrial foods add on top of exercise and protein.
- Whether melon and other antioxidant foods meaningfully change energy in people beyond short marker studies.
- How large urolithin A's effects are in everyday life, and how long they last.
Why it matters
If muscle, energy, and balance are all tied to how you eat and move, then daily habits shape strength and independence in later life. Weak muscles raise the risk of falls and lost independence, while low energy touches mood, activity, and metabolism. For preserving muscle with age, adequate protein and resistance exercise have a stronger evidence base than the specific mitochondrial foods discussed here. The trials on these foods are small and mostly short, so they support healthy aging rather than guarantee it.
What stands out
- Fatigue and weakness with age may start inside cells, not just from doing less.
- Not everyone's gut converts food into urolithin A equally, so the same foods may help people differently.
- Small percentage changes in strength can look unimpressive on paper, but whether changes this size mean fewer falls or more independence still needs better evidence.
Best-supported action
The single highest-leverage move from this episode, anchored in the strongest evidence the speaker presents.
Protect muscle first with regular resistance exercise and enough protein each day, and treat the mitochondrial foods here as a helpful add-on, not the foundation.
Where to start
Small low-friction starters covering the main moves from this episode.
- Do regular resistance exercise, such as bands or weights, the strongest lever for keeping muscle with age.
- Get enough protein across the day from animal or plant sources, especially as you get older or if you are doing resistance exercise.
- Eat oily fish such as salmon, sardines, or mackerel for EPA and DHA; flax, chia, and walnuts provide plant omega-3 (ALA), though the muscle evidence is stronger for EPA and DHA.
- Add pomegranate or walnuts, polyphenol-rich foods that some gut microbiomes turn into urolithin A.
Other supported actions
Further actions discussed in this episode, ordered from strongest to weakest evidence. This is one expert's view, the full topic compares and ranks across experts.
- Consider regular resistance exercise and a nutrient-dense diet with enough protein as the base for protecting muscle mass, strength, and independence with age. This is the best-supported move here.Strong evidence
- Consider omega-3 (especially EPA and DHA from oily fish) plus polyphenol-rich foods like pomegranate and walnuts as added support, best alongside strength training.Moderate evidence
- If energy stays low, consider a urolithin A supplement, especially if your gut may not convert food sources well, and discuss it with your doctor. The speaker has commercial ties in this area.Limited evidence
Full context, impact ratings, and timing — available in related topics
Questions to take to your doctor
- Given my age and any muscle or energy loss, would a urolithin A or omega-3 supplement add anything beyond exercise, protein, and these foods?
- Given my current medications, is a high-dose omega-3 supplement safe for me?
- Given any fall or balance concerns, what strength or mobility check would actually change my plan?
Full doctor prep with ranked questions available in the full topic page
Context
Physician-scientist focused on food as medicine and how specific foods affect the body's health-defense systems, including blood vessels, metabolism, and cellular energy. Tends to translate emerging nutrition and supplement trials into practical eating advice; strongest when pointing to human data, and less cautious when a single small trial is generalized into a broad recommendation.
These trials are small and mostly short, so they do not prove these foods rebuild muscle or reverse aging.
The urolithin A trial ran about four months in sedentary middle-aged adults, and it showed more for mitochondrial markers and muscle function than for large strength gains.
The speaker works in the food-as-medicine space and named a specific supplement brand, which is worth knowing when weighing the supplement advice.
This does not mean you should change or stop any current treatment on your own.
What survives: the foods here are healthy for many reasons, while the specific mitochondrial claims are promising but still early, and exercise plus protein remains the stronger base.
Where people go wrong
- Waiting until muscle and strength are already lost before acting.Rebuilding lost muscle is harder than protecting it, and falls become more likely.
- Leaning on foods or a supplement while skipping the exercise and protein that matter most.The foods may do little on their own, and the strongest muscle-protecting habits get missed.
What to expect over time
- First weeksLittle may feel different at first; strength and energy changes take time to build.
- Two to four monthsExercise and urolithin A trials measured gains in strength, endurance, or mitochondrial markers over roughly this window.
- Long termThe likely value is slowing muscle and energy loss over years, not a fast or dramatic change.