Walk into almost any pharmacy or health food store, and you’ll find shelves filled with vitamins, minerals, protein powders, and nutritional supplements promising better energy, stronger muscles, improved immunity, healthier aging, and longer life.
Social media has made the supplement industry even more confusing. One influencer recommends taking a dozen supplements every morning. Another claims that everyone needs a particular vitamin or mineral. Meanwhile, advertisements suggest that supplements can compensate for poor nutrition, inadequate sleep, or a sedentary lifestyle.
But here’s an important question:
Do you actually need the supplement you’re taking?
The answer depends on your diet, health conditions, medications, physical activity, and individual nutritional needs.
At WellHealthe, our approach to direct primary care and Lifestyle Medicine emphasizes evidence-based nutrition, prevention, and individualized care.
Supplements can be useful, but they should supplement a healthy lifestyle—not replace one.
Let’s look at eight commonly used supplements, what the research says, who might benefit, and how to determine whether they belong in your daily routine.
1. Multivitamins: Nutritional Insurance or Unnecessary Expense?
Multivitamins are among the most commonly used dietary supplements.
They typically contain a combination of vitamins and minerals intended to help fill nutritional gaps.
However, for generally healthy adults eating a varied, nutrient-rich diet, there is limited evidence that taking a daily multivitamin prevents cardiovascular disease, cancer, or premature death.
The U.S. Preventive Services Task Force concluded that evidence is insufficient to determine whether multivitamins prevent cardiovascular disease or cancer in otherwise healthy, nonpregnant adults.
Who might benefit?
People with restricted diets, poor dietary intake, certain gastrointestinal conditions, or increased nutritional requirements may benefit from targeted supplementation.
How do you know if you need one?
Start with an honest assessment of your diet. Are you regularly eating vegetables, fruits, legumes, whole grains, and other nutrient-rich foods?
A multivitamin may help fill some gaps, but it cannot replace the fiber, beneficial plant compounds, and other advantages of whole foods.
For most healthy adults, a multivitamin is optional rather than essential.
2. Whey Protein Powder: Convenient Protein, Not a Requirement
Protein is essential for maintaining muscle, supporting tissue repair, and preserving strength as we age.
Whey protein is a high-quality protein derived from milk. It contains all nine essential amino acids and is particularly rich in leucine, an amino acid involved in stimulating muscle protein synthesis.
Research suggests that protein supplementation can improve gains in muscle mass and strength when combined with resistance training, particularly when total dietary protein intake would otherwise be inadequate.
Who might benefit?
Older adults, individuals participating in resistance training, people recovering from certain illnesses, or patients working to preserve muscle during weight loss.
How do you know if you need it?
Estimate how much protein you consume from food and compare that with your individualized daily protein goal.
The general adult Recommended Dietary Allowance is 0.8 grams per kilogram of body weight daily, although older adults, physically active individuals, and some patients pursuing weight loss may benefit from higher targets.
At WellHealthe, we often individualize protein goals based on ideal body weight, physical activity, body composition, and health goals.
Practical recommendation: A serving providing approximately 20–30 grams of protein can be a convenient option when food intake falls short.
However, protein powder is not inherently superior to protein from beans, lentils, tofu, yogurt, eggs, fish, or other foods.
3. Creatine: More Than a Bodybuilding Supplement
Creatine is one of the most extensively studied sports nutrition supplements.
It helps regenerate ATP, the molecule cells use for energy, particularly during short bursts of high-intensity activity.
Creatine supplementation, especially when combined with resistance training, can improve strength, power, and gains in lean body mass.
Emerging research is also exploring potential benefits for older adults and cognitive health, although evidence for cognitive benefits remains less established.
Who might benefit?
Adults participating in resistance training, individuals seeking improvements in strength or power, and some older adults working to maintain muscle mass.
How do you know if you need it?
Creatine is not required to maintain health. However, it may be a useful option if your goals include improving exercise performance or preserving muscle while participating in strength training.
Practical recommendation: Creatine monohydrate, typically 3–5 grams daily, is the most studied form.
It is generally well tolerated in healthy adults, although individuals with kidney disease or other significant medical conditions should discuss its use with their healthcare professional.
4. Omega-3 Fatty Acids: Food First, Supplements Selectively
Omega-3 fatty acids are important components of cell membranes and play roles in cardiovascular and neurological health.
Two commonly discussed omega-3 fatty acids are EPA and DHA, found primarily in fatty fish and algae-derived supplements.
Another omega-3, ALA, is found in walnuts, chia seeds, flaxseeds, and certain plant oils.
Who might benefit?
People who rarely eat omega-3-rich foods may consider supplementation depending on their dietary pattern and individual needs.
Prescription omega-3 medications may also be appropriate for selected patients with elevated triglycerides or specific cardiovascular risk profiles.
However, a large randomized clinical trial published in the New England Journal of Medicine found that routine supplementation with 1 gram of marine omega-3 fatty acids daily did not significantly reduce major cardiovascular events in the overall study population.
How do you know if you need it?
Review how often you consume fatty fish or plant sources of omega-3s, along with your cardiovascular risk factors and lipid profile.
Practical recommendation: Prioritize omega-3-rich foods. Consider supplements selectively rather than assuming everyone needs fish oil.
High-dose omega-3 supplements can increase the risk of atrial fibrillation in some populations and may have medication-related precautions.
5. Vitamin D3 + K2: Understanding What the Evidence Supports
Vitamin D helps regulate calcium absorption and supports bone and muscle health.
Vitamin K is involved in blood clotting and the activation of proteins important for bone metabolism.
Vitamin D3 and K2 are frequently marketed together, often with claims that the combination improves calcium utilization and protects arteries.
However, evidence does not currently establish that everyone needs vitamin K2 alongside vitamin D3 or that the combination prevents cardiovascular disease.
The Endocrine Society’s 2024 clinical practice guideline recommends against routine vitamin D testing and supplementation above recommended dietary intakes for many generally healthy adults under age 75 without specific indications. Recommendations differ for certain populations, including older adults and pregnant individuals.
Who might benefit?
Vitamin D supplementation may be appropriate for people with documented deficiency, certain bone disorders, malabsorption conditions, or other specific clinical indications.
How do you know if you need it?
Risk factors, dietary intake, medical history, and sometimes laboratory testing can help guide decisions.
A blood test measuring 25-hydroxyvitamin D can assess vitamin D status when testing is clinically indicated. Routine screening is not necessary for every healthy adult.
Practical recommendation: Vitamin D3 may be useful when indicated, but adding K2 is not routinely necessary.
Patients taking warfarin should be particularly cautious with vitamin K supplements because they can interfere with anticoagulation management.
6. Magnesium Glycinate: Useful Mineral, but Is More Always Better?
Magnesium is involved in hundreds of biochemical reactions, including muscle function, nerve signaling, blood glucose regulation, and normal heart rhythm.
Magnesium glycinate is a form of magnesium often marketed for sleep, relaxation, and muscle recovery.
It is generally considered a well-tolerated formulation, although evidence that magnesium glycinate specifically improves sleep is limited.
Who might benefit?
People with inadequate magnesium intake, certain gastrointestinal conditions, medication-related magnesium losses, or documented magnesium deficiency.
How do you know if you need it?
Start by reviewing your diet.
Legumes, nuts, seeds, whole grains, and leafy green vegetables are excellent magnesium sources.
Laboratory testing may be appropriate when deficiency is suspected, although serum magnesium does not perfectly reflect total body magnesium stores.
Practical recommendation: Supplementation should be individualized. Excessive supplemental magnesium can cause gastrointestinal symptoms and may be dangerous in people with impaired kidney function.
7. Psyllium Fiber: One of the Most Practical Supplements
If there is one supplement that deserves more attention, it may be psyllium fiber.
Psyllium is a soluble, gel-forming fiber derived from the husks of Plantago ovata seeds.
It can help improve bowel regularity, lower LDL cholesterol, and modestly improve blood glucose control in some patients.
Unlike many supplements marketed with broad wellness claims, psyllium has evidence supporting several specific benefits.
Who might benefit?
People who struggle to meet their daily fiber requirements, individuals with constipation, and selected patients with elevated LDL cholesterol or type 2 diabetes.
How do you know if you need it?
Evaluate your daily fiber intake.
A useful general target is approximately 14 grams of fiber per 1,000 calories consumed, which translates to roughly 25–38 grams daily for many adults.
Most Americans consume substantially less than recommended.
Practical recommendation: Begin with a small serving, increase gradually, and take psyllium with adequate water. Follow product directions and separate it from medications when recommended.
Whole-food fiber from beans, lentils, vegetables, fruits, and whole grains should remain the foundation.
8. Electrolytes: When Water Isn’t Enough
Electrolytes are minerals—including sodium, potassium, chloride, calcium, and magnesium—that help regulate fluid balance, nerve signaling, and muscle function.
Electrolyte powders and drinks have become increasingly popular, but most people do not need them for routine hydration.
For typical daily activities and shorter exercise sessions, water and a balanced diet are generally sufficient.
Who might benefit?
People performing prolonged exercise, working in hot environments, sweating heavily for extended periods, or experiencing certain illnesses that cause significant fluid and electrolyte losses.
How do you know if you need them?
Consider your activity duration, sweat losses, environmental temperature, medical conditions, and medications.
For residents of the Coachella Valley, heat exposure deserves special attention, particularly during outdoor exercise or physically demanding work.
Practical recommendation: Electrolyte products may be useful in specific circumstances, but routine consumption of high-sodium drinks is unnecessary for most people.
Patients with heart failure, kidney disease, hypertension, or medications affecting sodium or potassium balance should seek individualized guidance.
Severe dehydration or significant vomiting and diarrhea may require properly formulated oral rehydration solutions or medical care rather than ordinary sports drinks.
Do You Need Laboratory Testing Before Taking Supplements?
One of the most common misconceptions is that everyone needs an extensive vitamin and mineral panel.
In reality, laboratory testing should be guided by symptoms, risk factors, medical history, and suspected deficiencies.
For example, vitamin B12 testing may be appropriate for patients with anemia, neuropathy, malabsorption, or certain dietary patterns.
Vitamin D testing may be appropriate for selected patients with bone disorders or other clinical indications.
Magnesium testing may be useful when deficiency is suspected because of medications, gastrointestinal losses, or other medical conditions.
Other supplements, including protein powder, creatine, and psyllium, are generally selected based on dietary intake and health goals rather than a laboratory test showing that the supplement is needed.
The goal is not to order more tests. It is to order the right tests for the right reasons.
Choosing a Quality Supplement
Unlike prescription medications, dietary supplements generally do not require FDA approval for safety and effectiveness before being marketed.
That makes product quality important.
When choosing supplements, look for independent third-party testing programs such as USP Verified or NSF certification.
These programs can help verify ingredient identity, label accuracy, and manufacturing quality, although they do not establish that a supplement is effective for a particular health condition.
Avoid products promising dramatic results, rapid cures, or benefits that sound too good to be true.
More ingredients and higher doses do not necessarily mean better results.
Supplements and the Six Pillars of Lifestyle Medicine
Supplements can have a place in a comprehensive health plan, but they are not one of the Six Pillars of Lifestyle Medicine.
Those pillars are:
- Healthy nutrition
- Regular physical activity
- Restorative sleep
- Stress management
- Positive social connection
- Avoidance of risky substances
A protein supplement cannot replace resistance training.
A multivitamin cannot reproduce all the benefits of a nutritious diet.
Magnesium cannot compensate for consistently inadequate sleep.
And an electrolyte drink cannot eliminate the risks of exercising in extreme heat.
The foundation of good health remains the behaviors we practice consistently.
The Bottom Line: Supplement With a Purpose
Before starting any supplement, ask yourself three questions:
1. What specific problem am I trying to solve?
Are you correcting a deficiency, meeting a nutritional target, improving exercise performance, or managing a particular medical condition?
2. Is there good evidence that this supplement helps?
Not every popular supplement has meaningful clinical benefits.
3. How will I know whether it’s working?
Depending on the supplement, progress might be measured through dietary intake, strength, bowel regularity, cholesterol levels, or laboratory results when appropriate.
At WellHealthe, we believe supplements should be selected based on evidence, individual needs, and realistic health goals—not marketing trends.
Through direct primary care and Lifestyle Medicine, we help patients evaluate their nutrition, identify meaningful deficiencies or gaps, and develop personalized strategies that support long-term health.
For patients throughout the Coachella Valley, the message is simple:
Start with a healthy lifestyle. Identify what is missing. Supplement only when there is a reason.
References
- U.S. Preventive Services Task Force. Vitamin, Mineral, and Multivitamin Supplementation to Prevent Cardiovascular Disease and Cancer. JAMA. 2022;327(23):2326–2333. doi.org/10.1001/jama.2022.8970
- Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine. 2018;52:376–384. doi.org/10.1136/bjsports-2017-097608
- Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition. 2017;14:18. doi.org/10.1186/s12970-017-0173-z
- Manson JE, Cook NR, Lee IM, et al. Marine n−3 Fatty Acids and Prevention of Cardiovascular Disease and Cancer. New England Journal of Medicine. 2019;380:23–32. doi.org/10.1056/NEJMoa1811403
- Endocrine Society. Vitamin D for the Prevention of Disease: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. 2024;109(8):1907–1947. doi.org/10.1210/clinem/dgae290
- National Institutes of Health, Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
- Jovanovski E, Khayyat R, Zurbau A, et al. Should Viscous Fiber Supplements Be Considered in Diabetes Control? Results From a Systematic Review and Meta-analysis of Randomized Controlled Trials. Diabetes Care. 2019;42(5):755–766. doi.org/10.2337/dc18-1126
- National Institutes of Health, Office of Dietary Supplements. Dietary Supplements: What You Need to Know. ods.od.nih.gov/factsheets/WYNTK-Consumer/
