Do you really need supplements? Experts weigh in

Supplements have surged in popularity, with over 75% of U.S. adults incorporating them into their daily routines by 2022. This growing trend is fueled by factors such as increased health awareness during the pandemic and the convenience of purchasing online from brands like Nature’s Bounty, Garden of Life, and NOW Foods. Yet, despite their widespread use, the question remains: are supplements truly necessary for maintaining optimal health? Experts emphasize that while supplements can fill dietary gaps and support specific physiological states, they are not a universal solution. The U.S. Food & Drug Administration does not regulate supplements as strictly as medications, leaving consumers to navigate a complex marketplace where claims often outpace scientific validation.

Health professionals caution against assuming supplements can substitute for balanced nutrition. Instead, they advocate prioritizing lifestyle and dietary modifications before turning to supplements. Certain populations stand to benefit more distinctly—pregnant or lactating individuals, those with diagnosed deficiencies, or people adhering to restrictive diets such as veganism may require targeted supplementation, particularly with nutrients like folic acid, vitamin D, B12, iron, and omega-3 fatty acids. For the majority, however, obtaining nutrients from a diverse diet rich in whole foods remains foundational.

As public discourse intensifies regarding the role of supplementation in immune support and chronic disease prevention, it is imperative to critically assess the evidence behind popularly marketed products. Consumers should engage with healthcare providers to tailor supplement choices to individual health needs, balancing efficacy and safety. This nuanced approach ensures supplements serve their intended purpose—to complement, not replace, a healthy diet and lifestyle.

When is it truly beneficial to consider dietary supplements?

Deciding whether to incorporate supplements requires understanding the nuanced roles they play in health. According to registered dietitians like Maddie Pasquariello, supplements are rarely the first line of defense against health issues; instead, they are adjuncts to medical and nutritional interventions. For example, prenatal vitamins containing folic acid and iron are strongly recommended for people preparing for and undergoing pregnancy to prevent neural tube defects and support fetal growth. Similarly, vitamin D supplementation is advised given that approximately 42% of people are deficient, with higher rates in certain demographics such as Black individuals—highlighting disparities in nutrient availability.

• Pregnancy and lactation: Specific supplementation, including prenatal vitamins and vitamin D, is standard to support fetal and infant health.
• Infants: Vitamin D supplementation is essential when breast milk is the sole nutrient source, or formula intake is insufficient.
• Special diets: Vegan or vegetarian diets may necessitate vitamin B12 supplements due to lack of animal product intake.
• Deficiencies: Diagnosed nutrient deficiencies such as iron or magnesium warrant targeted supplementation under medical supervision.
• Chronic health conditions: Individuals with conditions like autoimmune diseases or metabolic disorders may need tailored vitamin or mineral support.

Moreover, brands like Optimum Nutrition and Thorne Research are noted for their quality-controlled products that cater to specific nutritional gaps.

Navigating the popular supplements: which ones stand up to expert scrutiny?

Not all supplements boast strong scientific backing. Omega-3 fatty acids, found naturally in fish oils and nuts, are linked to heart health and managing inflammatory conditions like rheumatoid arthritis, but their effects are most pronounced when consumed through diet rather than supplementation alone. Vitamin B12, essential for nerve function and red blood cell formation, is crucial for those avoiding animal products. Iron supplementation benefits individuals with anemia or marginal iron storage, though dosing must be carefully managed to avoid toxicity. Magnesium supports multiple physiological functions, but deficiencies are common, warranting supplementation in some cases.

Conversely, many trendy supplements such as probiotics, green powders, or “mega-dose” vitamins often lack strong conclusive evidence for their purported benefits. The NCCIH notes that probiotics show limited efficacy for gastrointestinal conditions in supplement form, and greens powders should not replace actual vegetables. Excessive intake of vitamins like D or C can cause adverse effects including kidney issues or digestive disturbances.

• Recommended with caution: Omega-3s, vitamin B12, iron, vitamin D, magnesium
• Use with skepticism: Probiotics, green powders, mega-dose vitamins

Guide your choices towards reputable manufacturers such as GNC, Swanson, and USANA, who emphasize third-party testing and responsible formulation.

How to select and monitor supplements safely in 2025

Choosing supplements wisely requires vigilance. Since the FDA does not regulate supplements as stringently as pharmaceuticals, consumers should seek products that carry third-party verification seals from organizations like U.S. Pharmacopeial Convention or Consumer Labs. Avoid products with artificial additives or fillers, which may pose unwanted health risks. When selecting between chelated and non-chelated minerals, chelated forms generally offer improved absorption.

• Check for third-party testing and quality seals.
• Opt for chelated minerals for better bioavailability.
• Read labels critically for dosage and potential interactions.
• Consult with healthcare providers before starting supplementation.
• Track supplement effects through symptoms and laboratory assessments.

Monitoring for side effects is essential—diarrhea may indicate excessive vitamin C or magnesium intake, while bright urine can result from B-vitamin surpluses without harmful consequences.

Remember that supplements should complement a healthy lifestyle, including balanced nutrition, regular exercise, adequate sleep, and stress management, all of which are foundational to maintaining immune function and overall wellness.