Why Nutritional Supplements Matter
Nutritional supplement use is rising, reflecting sustained interest in accessible ways to enhance overall wellness.
Nutritional supplements have become a common part of many people’s wellness routines. For individuals wanting additional vitamins, minerals, and other nutrients, supplements offer a convenient way to complement what they receive from food. While supplements are not intended to replace a healthy diet, they can serve as an accessible option for individuals looking to support their nutritional needs.
A 2026 survey reported that nutritional supplement use continues to grow. 76% of survey participants reported taking supplements daily, and 44% reported increased use in 2025 compared to 2024.
Participants prioritized supplements for:
- General health (55%)
- Immunity (47%)
- Energy support (44%)
- Stress and mood support (41%)
- Weight management (35%)
These trends are consistent with a CRN Consumer Survey from 2023 that reported 74% of Americans consumed dietary supplements. Together, these data points suggest a sustained interest in supplement use to support overall wellness.
What are Supplements?
Dietary supplements provide vitamins and other nutrients to fill nutritional gaps and offer targeted support alongside a healthy diet.
Nutritional supplements (or dietary supplements) are ingestible products, tablets, capsules, powders, or liquids, taken to provide additional nutrients to the diet and support healthy bodies. They contain ingredients like vitamins, minerals, herbs, amino acids, and enzymes. Supplements are not intended to replace whole food meals but rather are a simple and effective way to fill nutritional deficiencies or offer targeted support for specific aspects of health.
Why Take Nutritional Supplements?
Supplements support natural body functions, address nutrient deficiencies, and offer targeted benefits, helping individuals optimize wellness when diet alone doesn’t meet their needs.
Many people use supplements to help support the body’s natural processes and maintain everyday well‑being. Certain nutrients and bioactive compounds can play supportive roles in areas like energy production, sleep quality, cognitive focus, and athletic performance. Others help the body respond to stress, maintain normal immune function, or promote healthy metabolism. Supplements can offer targeted support for specific wellness goals to help individuals feel their best.
Ideally, your body maintains adequate micronutrient levels and healthy balance through diet. While you should be able to acquire all the necessary micronutrients from your diet, circumstances often don’t meet expectations, leading to a deficiency. To support your healthy body, supplements can fill in the gap when there’s a deficiency.
Causes of micronutrient deficiencies vary by person and circumstance. Medical conditions, dietary restrictions, socio-economic status, lifestyle choices, pregnancy, aging, or other conditions can spur the need for supplemental nutrients. Different ingredients in supplements can target different bodily systems from your bones to your eyes.
Additionally, beyond simply correcting nutritional shortfalls, many individuals turn to specialized supplements to proactively optimize specific physiological functions. Rather than just returning the body to a baseline, targeted bioactive compounds are often taken to help fine-tune performance and address unique health objectives. Whether the goal is to support joint and cartilage integrity during rigorous physical activity, enhance cellular energy production, or support robust cognitive activity, these targeted formulations act as strategic tools that allow individuals to customize their regimen and actively pursue their personal peak wellness.
The Validity of Supplements
Some supplements have strong evidence, while others show mixed results due to complex nutrition research. Used thoughtfully, supplements can help meet nutrient needs and support wellness when diet alone is insufficient.
Some types of supplementation are well‑established within modern healthcare. Examples include the use of calcium and vitamin D to help maintain healthy bone density, as well as folic acid supplementation during pregnancy to help reduce the risk of certain birth defects. In these areas, research has consistently supported clear benefits.
In other areas, such as antioxidant supplementation for heart health, the research has been much less consistent. This is because promising biological mechanisms don’t always lead to proven benefits in people, and factors like nutrient absorption, differences in study design, and the complexity of how antioxidants work in the body can all affect outcomes. These variables often lead to mixed results across large clinical trials, making firm conclusions harder to reach.
While the evidence in some areas remains mixed, this should not be viewed as a reason to avoid supplementation altogether. Instead, it highlights the complexity of nutrition research. Many nutrients play essential roles in maintaining normal body function, and supplements can be a practical way to help meet those needs, especially when diet alone may fall short. When used thoughtfully and as part of an overall healthy lifestyle, supplements can be a valuable tool for supporting wellness, even as science continues to refine its understanding.
Micronutrient Deficiencies
Micronutrient deficiencies are a widespread but often overlooked health issue. Lacking key nutrients like iron, iodine, or vitamin D can impair essential body functions, making awareness and proactive nutritional support important.
The World Health Organization (WHO) characterizes micronutrient deficiencies as one of the world’s most serious but less visible health problems. Common micronutrient deficiencies worldwide include:
- Iron—Supports healthy red blood cell formation and normal oxygen transport in the body
- Iodine—Plays a key role in maintaining normal thyroid function
- Vitamin A—Important for eye health and immune function
- Zinc—Helps keep cellular processes functioning normal and supports normal immune function
- Folate (vitaminB9)—Contributes to healthy fetal development and supports normal cell division
- Vitamin D—Helps the body maintain strong bones, normal muscle function, and effective calcium absorption
While global micronutrient deficiency is a serious problem, individual deficiencies are also a concern. Understanding the negative effects of micronutrient deficiencies can help you plan healthy solutions and support your healthy body.
The History of Supplements
Nutrition science evolved from preventing deficiency diseases to studying long‑term health impacts. As research expanded, interest in supplements grew, prompting ongoing studies exploring their potential role in supporting overall wellness.
Prior to 1960, interest in nutrition focused mainly on the prevention of acute nutrient deficiency diseases, such as scurvy, rickets, and pellagra. Through the 20th century, scientists identified 50 essential nutrients (vitamins, minerals, antioxidants, cofactors, essential amino acids, and essential fatty acids). As understandings grew, international bodies including the World Health Organization and the Food and Agricultura Organization worked to evaluate global dietary patterns and establish recommended nutrient intakes for populations worldwide. These efforts played a major role in helping reduce nutrient-deficiency diseases.
During the past decades, focus has shifted to studying the effects of long-term diet and nutrition on the heart, bones, joints, eyes, nervous system, and immune system. Many of these interactions take decades (or lifetimes) to study. Despite this, advances in epidemiological and clinical research have uncovered a great deal of information about the impact of diet and nutrient intakes on long-term health.
In recent years, researchers have paid more attention to nutritional supplements as possible components of a healthy diet. These studies have used a wide variety of research methods and have produced both positive and negative results. Renewed interest in supplements has prompted further study.
Where to Learn More
The following categories provide example search terms you can use in PubMed or other scientific databases to explore peer‑reviewed research on nutritional supplements and functional foods. These suggested queries are intended to help you find relevant studies on a variety of health topics. By conducting your own searches through reliable scientific sources, you can build your understanding of the current state of nutritional research.
For convenience, references have been sorted by health issue:
