Longevidade

Longevity

July 16, 2026
The science of aging better: cellular energy, NAD, and habits | Viva Saudável
Longevity · Cellular energy

The science of aging better

Aging well begins long before it's noticed — it starts in the cells. The latest research places two themes at the heart of longevity: what you eat and how your body transforms those nutrients into energy. Much of it is within reach of simple and consistent choices, repeated every day.

~10%
The modest caloric reduction that various studies have associated with healthier aging — as long as the diet remains rich in nutrients.
37 billion
The cells that, at every moment, depend on energy to keep the body functioning.
The essential

Aging is not just a matter of time

The age on your ID card tells part of the story. The other part is written inside the cells — in the efficiency with which they produce energy, repair damage, and respond to daily wear and tear. This is where two concepts that have dominated the conversation about longevity come in: the quality of nutrition and energy metabolism.

The idea is not to follow extreme diets or chase miraculous promises. It is to understand that healthy aging results mainly from sustained habits over the years. Eating better, moving the body, getting enough sleep, and giving cells the nutrients they need are modest gestures — but their repetition makes the difference in the long run.

The foundation

Four pillars of healthy aging

01

Nutrient-rich diet

The issue is rarely eating less of everything, but eating better: balanced portions, varied fruits and vegetables every day, and fewer empty calories. A nutrient-dense diet sustains the body without overloading it.

02

Fit cellular energy

Every cell needs fuel to function. Molecules involved in energy metabolism tend to become less efficient with age, so it's worth supporting this process through diet and lifestyle.

03

Regular movement

Physical activity helps preserve muscle mass, mobility, and balance over the years. It doesn't require feats: walking, climbing stairs, and moving the body frequently already count — and a lot.

04

Sleep and stress management

It is during rest that the body recovers and repairs itself. Getting enough sleep and finding ways to relieve stress are pillars as important as diet — and often the most overlooked.

~150 min

Per week is the starting reference

International recommendations suggest about 150 minutes of moderate physical activity per week — just over 20 minutes a day. It is an accessible goal, built with walks, daily tasks, and regular movement throughout the week.

On the plate

Foods that support daily energy

Before thinking about any supplement, the basis comes from food. These are some common foods that provide nutrients linked to energy metabolism and a varied diet.

Fatty fish

Source of omega-3 and B-complex vitamins.

Eggs

Quality protein and various micronutrients.

Whole grains

Slow-release carbohydrates and vitamin B3.

Green leafy vegetables

Rich in vitamins, minerals, and fiber.

Berries

Natural antioxidants like polyphenols.

Legumes

Vegetable protein, fiber, and satiety.

Nuts

Healthy fats and minerals like magnesium.

Olive oil

The reference fat of the Mediterranean diet.

Supplement, not substitute

Smart supplementation

Food supplements do not replace a varied and balanced diet or a healthy lifestyle. They function as a complement — a way to support specific needs when it makes sense. These are options usually associated with the theme of energy and healthy aging.

Complementary · Thorne

Liquid Vitamin D

Why it can help

Vitamin D contributes to the normal functioning of muscles and the immune system and to the maintenance of normal bones — aspects that gain relevance with age.

How to use

Usually 2 drops per day, which can be added to food or drinks. The dose can be adjusted with professional guidance.

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Complementary · Thorne

Omega Superb

Why it can help

DHA contributes to normal brain function and to the maintenance of normal vision; EPA and DHA contribute to the normal function of the heart.

How to use

Usually 1 teaspoon per day, according to the recommended dose on the package.

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Complementary · Thorne

Magnesium Bisglycinate

Why it can help

Contributes to the reduction of tiredness and fatigue, to normal muscle function and to the normal functioning of the nervous system.

How to use

Usually 1 dose dissolved in water, at the end of the day. Do not exceed the recommended daily dose.

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Frequently asked questions

What needs clarifying

Does eating less really make you live longer?

Research suggests an association between modest caloric reduction and healthier aging, but the quality of the diet is crucial. Reducing calories at the expense of essential nutrients brings no benefit — the goal is to eat better, not just less.

What is NAD and why does it decrease with age?

NAD is a molecule present in all cells, with a central role in how the body transforms nutrients into energy. Its levels tend to decrease over the years, which is why its precursors have gained attention in the context of healthy aging.

Do supplements replace a good diet?

No. Food supplements are a complement and do not replace a varied and balanced diet or a healthy lifestyle. The foundation always comes from the plate and daily habits.

From what age is it worth thinking about this?

The sooner, the better. Habits that support healthy aging benefit the body at any stage of life — there is no right age to start taking care of energy and nutrition.

Small choices, repeated every day, make a difference in the long run.

Aging better does not depend on an isolated gesture or a single solution. It depends on the sum of simple habits — what you put on your plate, the time you dedicate to movement, the hours of sleep, and how you support the energy of your cells. Science points the way; it's up to each person, with proper guidance, to choose what makes sense in their daily life.

Support your healthy aging

Explore premium supplements 🛒
  • Selection of reference brands, such as Thorne
  • Clear language on what each supplement can support
  • Supplements designed for daily life, not substitutes

This content is for informational purposes only and does not constitute medical advice, diagnosis, or prescription. Food supplements do not replace a varied and balanced diet or a healthy lifestyle. In case of persistent concerns or clinical nature, it is recommended to consult a healthcare professional before starting any supplementation. Viva Saudável is an official distributor of Thorne Research in Portugal.

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