The Valley Medical Team
There’s always a trending must-have supplement for immunity, brain health, longevity, or anti-aging. If you follow every supplement trend, you’ll be taking handfuls of vitamins each day. Even the options in daily multivitamins are overwhelming. Should you take a comprehensive formula, a targeted supplement, or nothing at all?
On the flip side, some medical experts believe that most dietary supplements are a waste of money. They argue that a balanced diet provides all the nutrients you need, and that supplement companies profit from health anxiety and misinformation.
So, should you take vitamins or make other changes to your health and wellness routine?
The answer is more nuanced than a simple yes or no. Let’s dive into the science behind vitamins, minerals, and supplementation to help you make an informed decision about your personal health.
Do We Really Need Vitamins?
Yes, but with important context.
You require vitamins and minerals to perform the functions your body completes automatically every single day. From energy production to immune function to bone health, vitamins and minerals are essential cofactors in countless biological processes.
Ideally, you should obtain all essential nutrients from the foods you consume. In theory, this is possible. In reality, it’s complicated.
The truth: Approximately 90% of Americans are deficient or near-deficient in at least one vitamin or mineral, regardless of food security or socioeconomic status.
This statistic reveals a critical gap between what we should be eating and what we’re actually consuming. Let’s explore the factors that increase your need for supplementation.
Top Factors That May Increase Your Need for Supplementation
- Poor Nutrition
If your diet is high in processed foods, you’re consuming too many “empty calories,” lots of calories with minimal micronutrients and macronutrients.
This is why it’s entirely possible to be overweight or obese while being nutrient-deficient. You’re eating enough food (calories), but not enough nutritious food (vitamins and minerals).
The problem: Not all nutrients can come from supplementation. Some nutrients require whole food sources for optimal absorption and synergistic effects.
- Nutrient Diversity
Eating a diverse range of fruits, vegetables, whole grains, legumes, nuts, seeds, and minimally processed dairy and protein sources is required to obtain the full spectrum of vitamins and minerals your body requires.
There’s a significant difference between:
- Eating 3-5 servings of fruits and vegetables per day (typical American diet)
- Aiming for 20-30 different fruits and vegetables per week (optimal nutrition)
Most Americans eat the same 10-15 produce items repeatedly, missing out on the unique nutrient profiles of hundreds of other plant foods.
- Crop Depletion
How food is farmed and whether crops are properly rotated contribute greatly to nutrient value. Industrial agriculture often prioritizes yield and shelf-life over nutritional density.
As a result, you may not always be obtaining the full spectrum of nutrients your produce would contain if farmed using regenerative or organic methods. Soil depletion means less nutrient-dense crops.
- Season of Life
Your body has dramatically different nutrient needs during different seasons of life:
- Pregnancy and breastfeeding: Increased need for folic acid (B9), iron, calcium, and omega-3 fatty acids
- Trying to conceive: Increased folic acid and prenatal vitamins
- Menopause: Increased calcium and vitamin D for bone health
- Aging: Increased B12, vitamin D, and calcium
- Athletic training: Increased protein, iron, and electrolytes
- Recovery from illness: Increased vitamins C, D, and zinc
- Overall Health Status
Your medical conditions, prescription medications, lifestyle, and environment all influence your individual nutrient requirements:
- Medical conditions, Celiac disease, Crohn’s disease, IBS, and other digestive conditions, reduce nutrient absorption
- Medications: Many prescription drugs deplete specific nutrients (statins deplete CoQ10, for example)
- Lifestyle factors: Smoking, alcohol consumption, stress, and poor sleep all increase nutrient needs
- Environmental factors: Living in northern climates with limited winter sunlight increases vitamin D needs
The Bottom Line on Vitamin Needs
All these factors must be considered when deciding if you should take vitamins and what vitamins you should consume.
You don’t need to guess. A comprehensive health assessment and vitamin deficiency test can determine exactly which nutrients you should be supplementing. This personalized approach is far more effective than taking a generic multivitamin.
What Are Micronutrients and Macronutrients?
Before diving into specific vitamins, let’s clarify the difference between macronutrients and micronutrients.
Macronutrients are nutrients your body needs in large quantities (measured in grams). They include fiber, carbohydrates, and protein.
Micronutrients are nutrients your body needs in smaller quantities (measured in milligrams or micrograms). They include vitamins and minerals.
Macronutrients: The Foundation
Fiber
Most Americans obtain between 10-15 grams of fiber per day. This is nowhere near enough.
- Women should aim for: ~25 grams per day
- Men should aim for: ~38 grams per day
- Gut health experts recommend: 50 grams per day for optimal digestive and metabolic health.
Fiber is essential for digestive health, blood sugar regulation, cholesterol management, and feeding your beneficial gut bacteria. Most Americans are severely deficient.
Carbohydrates
Carbs get a bad rap, but they’re an essential energy source for your brain, muscles, and organs. The key is where you get your carbs from.
Good carbs come from whole foods and whole grains: oats, brown rice, quinoa, sweet potatoes, legumes, fruits, and vegetables.
Bad carbs come from processed foods: white bread, sugary cereals, pastries, sodas, and refined snacks.
When you overconsume refined carbs, your body processes the excess as sugar. This causes your insulin to spike. Consistently consuming too much sugar increases your risk for:
- Weight gain and obesity
- Type 2 diabetes
- Internal inflammation
- Heart disease
- Metabolic syndrome
- Cognitive decline
Protein
Although most Americans consume enough total protein, most aren’t obtaining the protein diversity required to get all 9 essential amino acids.
The problem: Most protein comes from meat (chicken, beef, fish). While meat is a complete protein source, relying solely on animal protein means missing out on the unique nutrients in plant-based proteins.
The solution: Balance your protein sources:
- Meat and fish (complete proteins)
- Legumes (beans, lentils, chickpeas)
- Nuts and seeds
- Whole grains
- Tofu and tempeh
- Dairy and eggs
This variety ensures you get all 9 essential amino acids plus the unique micronutrients in each protein source.
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What Do Vitamins Do in the Body?
Vitamins and minerals work together synergistically in your body. They’re cofactors in thousands of enzymatic reactions that keep you alive and healthy.
Once you determine which vitamins you need to supplement, you must consider:
- The dose (how much)
- Frequency (how often)
- Form (pill, spray, injection, liquid)
Important: Some vitamins stay in your body for days, while others stay for weeks or months. This is because some are fat-soluble and others are water-soluble.
Fat-Soluble Vitamins
Fat-soluble nutrients are stored in your liver and fatty tissues. They remain in your body for multiple days, weeks, or even months. This means you don’t need to consume them daily, but you also need to be careful not to overdose.
Vitamin A (Retinol)
Functions:
- Essential for vision and eye health
- Supports bone growth
- Strengthens immunity
- Promotes skin health
- Minimizes risk for lung and prostate cancer
Food sources: Carrots, sweet potatoes, orange and yellow squash, mangoes, spinach, kale
Vitamin D (Cholecalciferol)
Functions:
- Works synergistically with calcium to maintain bone and teeth health
- Supports immune function
- Regulates mood and mental health
- Reduces inflammation
How to get it:
- Sunlight: 5-30 minutes of direct sunlight every other day
- Food sources: Fatty fish (salmon, mackerel, sardines), fortified milk, fortified cereals, egg yolks
- Supplementation: Especially important in winter or for those with limited sun exposure
Vitamin E (Tocopherol)
Functions:
- Powerful antioxidant that minimizes cellular damage
- Protects cells from oxidative stress
- Helps maintain vitamin A levels
- Supports skin and heart health
Food sources: Sunflower seeds, almonds, peanuts, avocado, seafood, spinach, broccoli
Vitamin K (Phylloquinone)
Functions:
- Activates calcium and proteins
- Minimizes bruising and blood clotting
- Supports bone health
- Promotes heart health
Food sources: Eggs, milk, spinach, kale, all leafy green vegetables, broccoli, Brussels sprouts
Water-Soluble Vitamins
Water-soluble nutrients circulate in your bloodstream for only 1-2 days before passing through your urine. This means you need to consume them more frequently ideally daily.
Vitamin C (Ascorbic Acid)
Functions:
- One of the most powerful nutrient sources for immunity
- Beneficial for eye health and anti-aging
- Supports connective tissue and collagen production
- Promotes brain health
- Minimizes risk for various diseases
Food sources: All citrus fruits, strawberries, bell peppers, tomatoes, broccoli, spinach, kiwi
B1 (Thiamine)
Functions:
- Essential for converting food into energy
- Critical for brain function and nerve function
- Supports healthy muscles, hair, skin, and fingernails
Food sources: Ham, pork chops, brown rice, soymilk, watermelon, sunflower seeds, peanuts
B2 (Riboflavin)
Functions:
- Powers you throughout your day
- Supports brain health
- Promotes healthy blood, skin, and hair
Food sources: Dairy products, meat, leafy greens, whole grains, mushrooms, almonds
B3 (Niacin)
Functions:
- Aids in day-to-day endurance and energy
- Supports healthy skin, blood cells, brain, and nervous system
- May help with cholesterol management
Food sources: Meat, fish, whole grains, mushrooms, peanut butter, chicken, turkey
B5 (Pantothenic Acid)
Functions:
- Provides an energy boost
- Produces lipids, hemoglobin, neurotransmitters, and hormones
- Supports stress management and adrenal health
Food sources: Chicken, egg yolks, whole grains, broccoli, tomato, avocado, mushrooms
B6 (Pyridoxine)
Functions:
- Essential for brain health and cognitive function
- Supports immune function
- Creates red blood cells
- Produces serotonin (mood-boosting hormone)
- May decrease the risk of heart disease
Food sources: Meat, fish, tofu, legumes, bananas, potatoes, watermelon, chickpeas
B7 (Biotin or Vitamin H)
Functions:
- Helps convert food to energy
- Maintains glucose levels
- Supports healthy bones and hair
- Promotes skin health
Food sources: Whole grains, organ meat, egg yolks, soybeans, fish, almonds, sweet potatoes
B9 (Folate or Folic Acid)
Functions:
- Essential for creating new cells (why it’s known as a prenatal vitamin)
- Supports brain health and cognitive function
- May reduce the risk of breast cancer, heart disease, and colon cancer
- Critical during pregnancy for fetal development
Food sources: Leafy greens, legumes, asparagus, Brussels sprouts, avocado, broccoli, fortified cereals
B12 (Cobalamin)
Functions:
- Aids in the production of red blood cells and DNA
- Protects nerves and supports nerve growth
- Lowers the risk of heart disease
- Essential for energy and cognitive function
Food sources: Meat, fish, dairy, fortified cereals, nutritional yeast
Note: B12 is the most commonly deficient vitamin, especially in vegetarians, vegans, and older adults. Supplementation or injections may be necessary.
What About Mineral Supplementation?
Once you determine if you should take vitamins, you must also consider the essential and trace minerals your body requires.
Many daily multivitamins also contain minerals. They’re formulated to address the most common deficiencies for their target demographic. This is why it’s important to select a multivitamin designed for your gender, age, or other relevant demographics.
Essential and Trace Minerals Your Body Needs
Including the vitamins above, the human body requires just over 100 different nutrients. Of the vast list of minerals you should consume, there are several your body needs almost daily:
- Calcium – Bone health, muscle function, nerve transmission
- Chloride – Fluid balance, nerve function
- Chromium – Blood sugar regulation, metabolism
- Copper – Iron metabolism, immune function, collagen production
- Iodine – Thyroid function, metabolism
- Iron – Oxygen transport, energy production
- Manganese – Bone health, metabolism, antioxidant function
- Magnesium – Muscle function, nerve transmission, energy production, sleep quality
- Phosphorus – Bone health, energy production
- Potassium – Heart health, blood pressure regulation, muscle function
- Selenium – Thyroid function, antioxidant protection
- Sodium – Fluid balance, nerve function
- Sulfur – Joint health, connective tissue
- Zinc – Immune function, wound healing, protein synthesis
Most Americans are deficient in magnesium, zinc, and iron—three minerals critical for energy, immunity, and overall health.
Is There A Downside To Taking Vitamins or Supplements?
Yes, there certainly can be downsides. However, most of these downsides are avoidable with informed decision-making.
Understanding FDA Regulation
We call them “vitamins,” but the Food and Drug Administration considers dietary and nutritional supplements to be a subcategory of food, not drugs.
What this means:
- Supplements must meet strict quality control guidelines
- Most are formulated in FDA-approved facilities that meet or exceed FDA standards
- However, supplements don’t undergo the same rigorous testing as prescription drugs
- The burden of safety is partly on manufacturers and partly on consumers
Bottom line: Quality matters. Not all supplements are created equal.
Be Aware of What “Natural” Means
A common selling point that many dietary supplement brands make is stating that their product is formulated with “natural” ingredients.
The problem: “Natural” is largely unregulated. This might mean that only a few of the ingredients are natural. The rest could be synthetic or derived from questionable sources.
What to do:
- Read the label carefully
- Identify if the ingredients are truly all-natural
- Be mindful that “natural” does not mean “organic-certified”
- Look for third-party testing certifications (NSF, USP, ConsumerLab)
Be Mindful of Fillers and Additives
Some vitamins contain the nutrients you want, but they may also contain:
- Toxic fillers
- Unnecessary additives
- Artificial colors and flavors
- Binders and flow agents
- Preservatives
Why manufacturers add these:
- For color and flavor appeal
- To water down active ingredients and increase profits per supplement
- To improve shelf-life and stability
What to do:
- Read the label, including the “other ingredients” section
- Look for supplements with minimal additives
- Choose brands that prioritize clean, simple formulations
Take As Directed
Like most things in life, more is not better. Some supplements are designed for short-term use:
- You may only supplement vitamin D in the winter
- You may increase antioxidants during the cold and flu season
- You may take iron supplements only if deficient
- You may take probiotics during or after antibiotic use
If you don’t follow directions:
- You could experience side effects (nausea, headaches, digestive upset)
- You may get no added benefits
- You could experience toxicity (especially with fat-soluble vitamins)
Best practice: Follow the dosage instructions on the label, and consult with a healthcare provider about your specific needs.
Quality Matters
You’ve probably heard claims that vitamin capsules aren’t absorbed by the body, or that liquid, spray, or injected vitamins are superior.
The truth is nuanced:
- Your body can digest and absorb most vitamins
- Some vitamins do pass through your stool unabsorbed
- This could be because you’re not taking them as directed (with food or enough water)
- It could also be due to poor quality or poor formulation
The solution: Purchase your supplements from reputable sources that prioritize quality and bioavailability.
At Valley Medical Weight Loss and Med Spa, we offer:
- High-quality vitamin supplements with proven bioavailability
- Vitamin injections that release nutrients quickly into your tissues and bloodstream
- Personalized supplement recommendations based on your deficiency testing
Results Take Time
Most scientific studies that measure the effectiveness of vitamin, mineral, and herbal supplements don’t show full benefits for at least 90 days.
Why?
- Your body needs time to build nutrient stores
- Cellular changes take time to manifest
- Symptoms may improve gradually before you notice significant changes
Expectation: Be patient. Give supplements at least 3 months before evaluating effectiveness.
What About Herbal Supplements?
Herbal supplements have the potential to increase plant-based nutrients in your diet without consuming more plants.
Plants are one of the top ways to consume trace minerals your body requires less frequently. They may also offer a chemical-free method of addressing your unique health and wellness needs.
Examples of beneficial herbal supplements:
- Turmeric (curcumin) – Anti-inflammatory
- Ginger – Digestive support, anti-inflammatory
- Ashwagandha – Stress management, adaptogen
- Echinacea – Immune support
- Elderberry – Cold and flu support
- Milk thistle – Liver support
- Ginseng – Energy and endurance
Important: Be mindful of the same guidelines mentioned above:
- Check for quality and third-party testing
- Understand what “natural” means
- Be aware of fillers and additives
- Take as directed
- Allow time for results
- Consult with a healthcare provider about interactions with medications
Should You Take Vitamins? The Personalized Answer
Whether or not you should take vitamins is unique to your current health, wellness, and season of life.
Consider supplementation if:
- You follow a restrictive diet (vegan, vegetarian, elimination diet)
- You have a medical condition that affects nutrient absorption
- You’re in a specific season of life (pregnancy, menopause, aging)
- You take medications that deplete nutrients
- You have symptoms of deficiency (fatigue, hair loss, brain fog, weak immunity)
- You live in a climate with limited winter sunlight (vitamin D deficiency)
- You have a family history of certain health conditions
You might not need supplementation if:
- You eat a diverse diet with plenty of whole foods
- You have no symptoms of deficiency
- You have no medical conditions affecting absorption
- You’re in good overall health
The best approach: Get tested. Don’t guess.
Schedule Your Personalized Vitamin Assessment
If you live in or around Phoenix, Tempe, Glendale, or Chandler, we invite you to schedule an appointment with Valley Medical Weight Loss and Med Spa.
Our comprehensive vitamin assessment includes:
- Detailed bloodwork to identify deficiencies
- Vitamin deficiency testing
- Comprehensive medical assessment
- Personalized supplement recommendations
- High-quality take-home supplements
- Vitamin injections for rapid nutrient delivery
Our team will determine exactly which supplements support your unique needs so you’re not wasting money on vitamins you don’t need, and you’re not missing out on nutrients you do need.
Schedule your appointment today:
Walk-In Hours: Mon–Fri: New patients until 4:30 PM, existing patients until 5:30 PM; Sat: until 2:30 PM; Sun: Closed.
More Vitamin and Supplement Resources
Looking for more information about nutrition and wellness? Check out our other blog posts:
- Multivitamins and Weight Management: What’s the Connection?
- Micronutrient Testing for Weight Loss
- GLP-1 Personalized Nutrition: Meal Planning and Muscle Preservation
- Is Your Gut Bacteria Why You Aren’t Losing Weight?
- Healthy Recipe: Magnesium-Rich Smoothie
References
Vitamin and mineral information based on FDA guidelines, NIH recommendations, and peer-reviewed scientific research. Individual nutrient requirements vary based on age, sex, health status, medications, and lifestyle factors.
Disclaimer
This article is intended for educational and informational purposes only. Individual vitamin and mineral needs vary based on age, sex, medical conditions, medications, and lifestyle factors. Always consult with a qualified healthcare provider or registered dietitian before starting new supplements, especially if you take prescription medications, have medical conditions, or are pregnant or breastfeeding. Valley Medical Weight Loss and Med Spa is committed to personalized, medically supervised nutrition and wellness care.


