Are supplements regulated by the FDA?

Not the way drugs are. The FDA does not approve dietary supplements before they go to market — manufacturers are responsible for ensuring their products are safe and accurately labeled, but there’s no pre-market review process. The FDA can take action after the fact if a product is found to be unsafe, but by then it may have been on shelves for years. This is why third-party testing certifications (USP, NSF, Informed Sport) are so important — they provide independent verification that the label is accurate and the product is free from contaminants.

What fillers and additives should I avoid in supplements?

Key ones to avoid: titanium dioxide (a synthetic whitener linked to gut inflammation and genotoxicity in some studies), artificial colors like FD&C Red 40, Blue 2, or Yellow 5, artificial flavors, high-fructose corn syrup or added sugars in gummies, carrageenan (a thickener linked to gut irritation), and unnecessary preservatives. Magnesium stearate and silicon dioxide are common flow agents — generally considered low-risk but unnecessary in a clean formulation. The shorter the “Other Ingredients” list, the better.

What does "third-party tested" mean for supplements?

Third-party tested means an independent laboratory — not the manufacturer — has verified that the supplement contains what the label claims at the stated dose, and that it’s free from contaminants like heavy metals, pesticides, and microbes. The most recognized certifications are USP Verified, NSF Certified, and Informed Sport. A brand simply claiming “third-party tested” without naming the certifying body is a weaker signal — look for the actual certification seal on the label or product page.

Are kids' supplements safe?

Many popular kids’ supplements — especially gummies — are loaded with added sugars, artificial colors, and synthetic flavors that undermine the health benefits they’re supposed to provide. Some also contain doses calibrated for adults, not children. When choosing supplements for kids, look for products specifically formulated for their age group, with age-appropriate doses, no artificial dyes, and minimal added sugar. Third-party certification is especially important for children’s products. When in doubt, consult your pediatrician before starting any supplement regimen.

What's wrong with proprietary blends in supplements?

Proprietary blends list multiple ingredients under a single combined dose without disclosing how much of each ingredient is included. This makes it impossible to evaluate whether any individual ingredient is present at a dose that’s actually effective — or safe. Brands use proprietary blends to protect formulas from competitors, but it also protects them from scrutiny. We prefer supplements that disclose the full dose of every active ingredient so you can make an informed decision.

Is creatine safe, and what should I look for in a clean creatine supplement?

Creatine monohydrate is one of the most researched supplements in existence and has a strong safety record at standard doses (3–5g/day). The concern isn’t creatine itself — it’s what’s in the product with it. Many creatine supplements contain artificial flavors, synthetic dyes, sucralose, and unnecessary fillers. For a clean creatine, look for pure creatine monohydrate with no additives — ideally Creapure® certified (a German-manufactured form with the highest purity standards) and third-party tested for heavy metals and contaminants. Unflavored is almost always the cleanest option.

Do I need supplements if I eat a healthy diet?

For most people, a few targeted supplements make sense even with a good diet. Vitamin D is the most common deficiency in the US — most people don’t get enough sun exposure year-round to maintain optimal levels. Magnesium is depleted by stress and often low in modern diets. Omega-3s are difficult to get in adequate amounts unless you eat fatty fish multiple times a week. Beyond those, the need depends on your diet, health status, and life stage — pregnant women, vegans, and older adults often have specific needs that diet alone may not cover. A blood panel is the most reliable way to know what you actually need.

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Most supplements are full of unnecessary fillers, synthetic dyes, and additives that have nothing to do with your health. We vet every product for clean, minimal ingredient lists — so you get the active ingredients you need without the junk you don’t.

How to Choose Clean Supplements

1. What to Avoid in Supplements

The supplement industry is largely unregulated, which means fillers, synthetic dyes, and unnecessary additives are common even in well-known brands. Watch out for magnesium stearate and silicon dioxide (common flow agents with questionable necessity), titanium dioxide (a synthetic whitener linked to gut inflammation), artificial colors like FD&C Red 40 or Blue 2, and proprietary blends — which list ingredients without disclosing individual doses, making it impossible to evaluate effectiveness or safety.

2. How to Read a Supplement Label

The “Supplements Facts” panel shows active ingredients and doses. The “Other Ingredients” list is where fillers, binders, and additives hide — the shorter this list, the better. Look for recognizable, minimal inactive ingredients like cellulose (vegetable capsule), rice flour, or ascorbic acid. If you see a long list of chemical-sounding names, that’s a red flag. Also check that doses align with research-backed effective amounts, not token quantities added for label appeal.

3. Third-Party Certifications That Matter

Because the FDA doesn’t approve supplements before they go to market, third-party testing is the most reliable quality signal. USP Verified confirms the product contains what the label says at the stated dose. NSF Certified for Sport adds testing for banned substances. Informed Sport is the gold standard for athletes. These certifications don’t guarantee a supplement works, but they do confirm it’s accurately labeled and free from contaminants.

Want deeper guidance by supplement type? Browse all of our supplement guides for ingredient-by-ingredient breakdowns and brand recommendations.

We look for third-party testing (USP, NSF, or Informed Sport certification), minimal inactive ingredients, no synthetic dyes or artificial flavors, and transparent sourcing. We avoid proprietary blends that hide individual ingredient doses, and we prioritize brands that publish their testing results.

Vitamins & Supplements FAQs

Not the way drugs are. The FDA does not approve dietary supplements before they go to market — manufacturers are responsible for ensuring their products are safe and accurately labeled, but there’s no pre-market review process. The FDA can take action after the fact if a product is found to be unsafe, but by then it may have been on shelves for years. This is why third-party testing certifications (USP, NSF, Informed Sport) are so important — they provide independent verification that the label is accurate and the product is free from contaminants.
Key ones to avoid: titanium dioxide (a synthetic whitener linked to gut inflammation and genotoxicity in some studies), artificial colors like FD&C Red 40, Blue 2, or Yellow 5, artificial flavors, high-fructose corn syrup or added sugars in gummies, carrageenan (a thickener linked to gut irritation), and unnecessary preservatives. Magnesium stearate and silicon dioxide are common flow agents — generally considered low-risk but unnecessary in a clean formulation. The shorter the “Other Ingredients” list, the better.
Third-party tested means an independent laboratory — not the manufacturer — has verified that the supplement contains what the label claims at the stated dose, and that it’s free from contaminants like heavy metals, pesticides, and microbes. The most recognized certifications are USP Verified, NSF Certified, and Informed Sport. A brand simply claiming “third-party tested” without naming the certifying body is a weaker signal — look for the actual certification seal on the label or product page.
Many popular kids’ supplements — especially gummies — are loaded with added sugars, artificial colors, and synthetic flavors that undermine the health benefits they’re supposed to provide. Some also contain doses calibrated for adults, not children. When choosing supplements for kids, look for products specifically formulated for their age group, with age-appropriate doses, no artificial dyes, and minimal added sugar. Third-party certification is especially important for children’s products. When in doubt, consult your pediatrician before starting any supplement regimen.
Proprietary blends list multiple ingredients under a single combined dose without disclosing how much of each ingredient is included. This makes it impossible to evaluate whether any individual ingredient is present at a dose that’s actually effective — or safe. Brands use proprietary blends to protect formulas from competitors, but it also protects them from scrutiny. We prefer supplements that disclose the full dose of every active ingredient so you can make an informed decision.
Creatine monohydrate is one of the most researched supplements in existence and has a strong safety record at standard doses (3–5g/day). The concern isn’t creatine itself — it’s what’s in the product with it. Many creatine supplements contain artificial flavors, synthetic dyes, sucralose, and unnecessary fillers. For a clean creatine, look for pure creatine monohydrate with no additives — ideally Creapure® certified (a German-manufactured form with the highest purity standards) and third-party tested for heavy metals and contaminants. Unflavored is almost always the cleanest option.
For most people, a few targeted supplements make sense even with a good diet. Vitamin D is the most common deficiency in the US — most people don’t get enough sun exposure year-round to maintain optimal levels. Magnesium is depleted by stress and often low in modern diets. Omega-3s are difficult to get in adequate amounts unless you eat fatty fish multiple times a week. Beyond those, the need depends on your diet, health status, and life stage — pregnant women, vegans, and older adults often have specific needs that diet alone may not cover. A blood panel is the most reliable way to know what you actually need.

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