Changes in metabolism, muscle mass, bone health and nutrient absorption can make certain foods and nutrients especially valuable during different stages of adulthood. The good news is that it's never too late to make small changes that support healthy aging.

Here's what to consider from your 30s through your 70s and beyond.

In Your 30s: Build a Strong Foundation

Your 30s are a great time to establish eating habits that can support your health for decades to come.

Rather than concentrating on a single "superfood," aim for variety. Different fruits, vegetables, beans, whole grains, nuts, seeds, herbs and spices provide different combinations of fiber and beneficial plant compounds.

Foods to Focus On

Try incorporating more:

• Leafy green vegetables
• Lentils and beans
• Whole grains
• Nuts and seeds
• Eggs and dairy or fortified alternatives
• Colorful fruits and vegetables
• Herbs and spices

Iron is particularly important for women who menstruate, while folate and vitamin B12 are important nutrients during the childbearing years.

Vitamin D deserves attention too. Food sources include fatty fish, egg yolks and fortified foods, although some people may need supplementation depending on their diet, sun exposure and individual needs.

Simple goal: Make variety the priority. Instead of simply eating more plants, try eating more different plants throughout the week.

In Your 40s: Think About Heart Health

Your 40s are a good time to pay closer attention to the quality of carbohydrates and fats in your diet.

Whole grains, beans, lentils, nuts, vegetables and fruit provide fiber and other nutrients that support cardiovascular and metabolic health.

It can also be helpful to replace some foods high in saturated fat with sources of unsaturated fats.

Foods to Focus On

Consider adding more:

• Oats and other whole grains
• Chickpeas, lentils and beans
• Walnuts and almonds
• Olive oil
• Avocado
• Berries
• Tomatoes
• Fatty fish

A Mediterranean-style eating pattern naturally incorporates many of these foods and emphasizes vegetables, fruit, whole grains, legumes, fish and olive oil.

Simple goal: Make one heart-friendly swap each day—such as olive oil instead of butter or nuts instead of a highly processed snack.

In Your 50s: Prioritize Protein and Fiber

Maintaining muscle becomes increasingly important in midlife.

Age-related muscle loss can gradually accelerate as we get older, making both resistance exercise and adequate protein valuable parts of a healthy-aging routine.

Instead of saving most of your protein for dinner, consider including a meaningful protein source at breakfast and lunch as well.

Protein-Rich Foods to Try

Good options include:

• Fish
• Chicken or turkey
• Eggs
• Greek yogurt
• Cottage cheese
• Lentils
• Chickpeas
• Tofu and other soy foods

Fiber deserves just as much attention.

Whole grains, oats, beans, apples, onions, root vegetables and potatoes with their skins intact can help increase daily fiber intake while supporting digestive health.

Simple goal: Include a source of protein and a fiber-rich plant food at each meal.

In Your 60s: Make Every Bite Count

As we get older, energy needs may decrease while the need for essential nutrients remains.

That makes nutrient density increasingly important.

Instead of simply eating less, concentrate on foods that deliver protein, fiber, vitamins, minerals and healthy fats without relying heavily on highly processed foods.

Foods to Focus On

Build meals around foods such as:

• Colorful vegetables
• Berries and citrus fruits
• Eggs
• Fish
• Beans and lentils
• Whole grains
• Nuts and seeds
• Dairy or fortified alternatives
• Olive oil

Don't Forget Bone Health

Bone health becomes particularly important for women during and after menopause.

Calcium, vitamin D, magnesium and vitamin K all contribute to normal bone health.

Calcium-rich choices can include dairy products, calcium-fortified plant milks and certain leafy greens, while eggs and fatty fish provide some vitamin D. Whole grains, nuts, seeds and vegetables can contribute magnesium and other important nutrients.

Strength and weight-bearing exercise are also important partners to good nutrition when it comes to supporting bones and muscles.

Simple goal: Choose foods based on the nutrition they provide—not simply their calorie count.

In Your 70s and Beyond: Focus on Nutrient Density and Hydration

Appetite can decrease with age, which means getting enough nutrients from smaller meals may become more challenging.

Protein remains important for maintaining muscle, while nutrients such as vitamin B12, iron, calcium and vitamin D may deserve additional attention depending on your diet and health.

Foods to Keep in Rotation

Try nutrient-rich choices such as:

• Eggs
• Fish and poultry
• Yogurt
• Beans and lentils
• Nut butters
• Whole grains
• Cooked vegetables
• Fruit
• Soups and broths

Vitamin B12 is particularly worth paying attention to as you get older because the body's ability to absorb it can decline. People who eat little or no animal-derived food also need a reliable source of B12 through fortified foods or supplementation.

Hydration Matters More Than You Might Think

Thirst can become a less reliable signal as we age, making it easier to become dehydrated without realizing it.

Water is the obvious choice, but it isn't the only way to stay hydrated.

Tea, coffee, milk, soups and water-rich foods such as watermelon, cucumber, oranges and berries can all contribute to overall fluid intake.

Keeping a glass or bottle of water somewhere visible can also serve as a simple reminder to drink throughout the day.

Healthy Eating Doesn't Have an Expiration Date

There's no perfect diet for every person—or every age.

What matters is adapting as your body changes.

In your 30s, that might mean building greater variety into your diet. In your 50s, protein and fiber may deserve more attention. Later in life, maintaining muscle, supporting bone health and getting enough nutrients and fluids can become increasingly important.

The bigger picture remains surprisingly simple: eat plenty of minimally processed, nutrient-rich foods, stay physically active and adjust your habits as your needs change.

Small choices made consistently can help support strength, energy and overall well-being for years to come.

Important: Nutritional needs vary depending on medications, medical conditions, activity level and other individual factors. Talk with your healthcare provider or a registered dietitian before making major dietary changes or starting supplements, particularly if you have a medical condition or take prescription medications.