If you take pharmaceutical drugs, you will find garbage things in almost every drug. Most people I know have never even looked at the other ingredients that are in their pharmaceutical drugs. I encourage you to take the ones that you are consuming and look up the other ingredients that are in those drugs on the internet. You may be horrified.

The supplement brand really does matter. You are going to pay more for better quality supplements. Very few supplement brands have good quality and use good binders and fillers.

The really good brands generally usually use capsules (not tablets) and ingredients that are good such as:

1. Vegetarian capsule (cellulose, water)
2. Hypoallergenic plant fiber (cellulose)
3. Ascorbyl palmitate
4. Starch (potato)
5. Gelatin
6. Glycerin
7. Olive Oil
8. Beeswax

Listed here below are the bad, ugly and not so great binders, fillers and other ingredients used in lower quality vitamins, supplements and drugs.

🧪 1. Magnesium Stearate (aka Stearic Acid)

• Why it’s used: Lubricant to prevent capsules from sticking to machines.
• Concerns:
  • May inhibit absorption of nutrients (creates a “soap film”).
  • Can suppress T-cell function in high doses (impacts immune function).
  • ​Tebbey PW, Buttke TM. Immunol Lett. 1990 – Stearic acid induced apoptosis in immune cells.

🏭 2. Titanium Dioxide

• Why it’s used: White coloring agent and opacifier in tablets.
• Concerns:
  • Classified by IARC as “possibly carcinogenic to humans” when inhaled.
  • Linked to gut inflammation and DNA damage in animal studies.
  • ​Bettini S et al., Sci Rep. 2017 – Found to alter immune response and promote inflammation in the gut.

🧂 3. Silicon Dioxide

• Why it’s used: Anti-caking agent to prevent clumping.
• Concerns:
  • Generally regarded as safe (GRAS), but concerns arise from nano-sized particles used in some products.
  • Nanoparticles may be absorbed systemically and cause oxidative stress.
  • Johnston HJ et al., Part Fibre Toxicol. 2010

🌡️ 4. Artificial Colors (FD&C dyes)

• Why they’re used: Make tablets look more appealing or consistent.
• Concerns:
  • Linked to hyperactivity in children, allergic reactions, and potential carcinogenic effects.
  • Some are banned in other countries.
  • ​Kobylewski & Jacobson, Int J Occup Environ Health, 2012 – Synthetic dyes may cause adverse neurobehavioral effects.

🍬 5. Artificial Sweeteners (Aspartame, Sucralose, etc.)

• Why they’re used: Flavoring in chewables, gummies, and powders.
• Concerns:
  • Linked to gut microbiome disruption, glucose intolerance, and headaches.
  • ​Suez J et al., Nature, 2014 – Artificial sweeteners induced dysbiosis and glucose intolerance in mice.

🧫 6. Hydrogenated Oils / Trans Fats Such as Corn Oil and Soy(bean) Oil

• Why they’re used: Lubrication and consistency in capsule production.
• Concerns:
  • Linked to cardiovascular disease, inflammation, and metabolic disorders.
  • They are genetically modified and use cancer causing pesticides
  • Mozaffarian et al., N Engl J Med, 2006 – Trans fats increase risk of heart disease and inflammation.

🧬 7. Talc (Magnesium Silicate)

• Why it’s used: Anti-caking agent.
• Concerns:
  • Inhaled talc may contain asbestos contamination; associated with lung and ovarian cancers. IARC Monograph​

🧱 8. Cellulose (Microcrystalline Cellulose)

• Why it’s used: Binder or bulking agent.
• Concerns:
  • Generally safe, but may cause bloating or GI issues in sensitive individuals.

🍬 9. Maltodextrin

• What it is: A highly processed polysaccharide, typically derived from corn, wheat, or rice.
• Why it’s used: Filler, binder, or sweetener; improves texture and flow.
• Concerns:
  • Has a high glycemic index → spikes blood sugar.
  • May disrupt gut flora and increase intestinal permeability.
  • Often made from GMO corn.
  • ​Nickerson KP et al., Gut Microbes, 2012: Maltodextrin promotes E. coli adhesion and impairs antimicrobial responses.
  • ​Anderson JW et al., Nutr Res., 2004: GI and metabolic effects in diabetic patients.

🍭 10. Dextrose

• What it is: A simple sugar (glucose) derived from corn.
• Why it’s used: Sweetener, stabilizer, or carrier for powdered supplements.
• Concerns:
  • Rapidly spikes blood sugar.
  • Often GMO-derived, cancer causing pesticides used.
  • Bray GA, Am J Clin Nutr, 2004: Simple sugars contribute to insulin resistance and obesity.

🌱 11. Guar Gum

• What it is: A soluble fiber from guar beans.
• Why it’s used: Thickener, binder, or stabilizer.
• Concerns:
  • Generally safe, but can cause bloating, gas, or loose stools in sensitive individuals.
  • In large amounts, may interfere with nutrient absorption.
  • Slavin JL, Nutr Res Rev, 2013: Mixed data on prebiotic vs. anti-nutrient effects.

💊 12. Croscarmellose Sodium

• What it is: Chemically modified cellulose with sodium; super-disintegrant in tablets.
• Why it’s used: Helps tablets break apart quickly for absorption.
• Concerns:
  • Generally considered safe, but synthetically modified.
  • Possible GI discomfort in sensitive individuals.
  • Studies: Very limited direct health studies, but concerns arise from its synthetic, modified nature.

🍋 13. Citric Acid

• What it is: Usually derived from fermented mold on GMO corn (not citrus fruits). YUK!!
• Why it’s used: Preservative, flavor enhancer, or acidity regulator.
• Concerns:
  • Can cause inflammation or allergic-like symptoms in some people.
  • Linked to oral and GI irritation.
  • ​Sweis LE, et al., Toxicol Reports, 2021: Industrial citric acid may trigger inflammatory responses in sensitive individuals.

🍓 14. “Natural Flavors”

• What it is: A vague term that can include up to 500+ chemical compounds, often with preservatives, solvents, or carriers.
• Why it’s used: To enhance flavor, mimic taste of real ingredients.
• Concerns:
  • Lack of transparency — can include MSG derivatives, solvents, or allergenic substances.
  • Can trigger reactions in sensitive individuals.
  • ​CSPI Report: Details how “natural flavors” can include synthetic additives and allergens.

📦 15. Hydroxypropyl Methylcellulose (HPMC)

• What it is: A semi-synthetic polymer used for vegan capsules.
• Why it’s used: Capsule shell alternative to gelatin.
• Concerns:
  • Generally well-tolerated, but not natural — chemically modified cellulose.
  • May affect absorption rate of nutrients.
  • ​Food Chem Toxicol. 1997: Considered non-toxic in moderation.

🧪 16. Propylene Glycol

• What it is: Synthetic solvent and humectant (moisture-retainer).
• Why it’s used: Stabilizes liquid formulations and prevents drying.
• Concerns:
  • Can cause liver/kidney stress, allergic reactions, or neurotoxicity in high doses.
  • Used in antifreeze and cosmetics.
  • ​ATSDR Toxicological Profile: Generally low toxicity, but cumulative exposure may be problematic.

🧂 17. Sodium Benzoate

• Purpose: Preservative (especially in liquid supplements).
• Concerns:
  • Can form benzene, a known carcinogen, when combined with vitamin C.
  • Linked to hyperactivity in children and oxidative stress.
  • ​Pediatrics, 2007: Linked artificial colors + sodium benzoate to hyperactivity.
  • ​Food Chem Toxicol, 2006: Induces oxidative stress in the liver and brain.

🧪 18. Polysorbate 80

• Purpose: Emulsifier/stabilizer in liquids and capsules.
• Concerns:
  • May disrupt the gut lining, contribute to leaky gut, and alter microbiota.
  • ​Chassaing et al., Nature, 2015: Polysorbate 80 caused gut inflammation and metabolic syndrome in mice.

🚫 19. Carrageenan

• Purpose: Thickener in powders or liquids (especially protein or nutritional drinks).
• Concerns:
  • Linked to intestinal inflammation, ulceration, and IBD flare-ups.
  • ​Tobacman JK, Env Health Perspect, 2001: Carrageenan shown to cause inflammation and possibly promote tumor growth in animal models.

🧬 20. PEG (Polyethylene Glycol)

• Purpose: Stabilizer, dispersing agent, laxative in some products.
• Concerns:
  • Can trigger hypersensitivity reactions; some forms are contaminated with ethylene oxide.
  • [FDA & Tox Reports]: Known to cause allergic reactions in sensitive individuals and found in some PEGylated drugs linked to anaphylaxis.

🧊 21. Sorbitol / Mannitol / Xylitol (Sugar Alcohols)

• Purpose: Sweeteners in chewables or powders.
• Concerns:
  • Can cause bloating, diarrhea, or fermentation in the gut.
  • Sorbitol in particular is often GMO-derived and poorly absorbed.:
  • ​Livesey G, Eur J Clin Nutr, 2003: Sugar alcohols can induce GI distress in moderate doses.

🧴22. Shellac / Pharmaceutical Glaze

• Purpose: Glossy coating on tablets.
• Concerns:
  • Not digestible; delays disintegration and absorption.
  • Derived from insect resin (non-vegan, and sometimes allergenic).
  • No nutritional value; debated role in absorption issues.

🧁 23. Artificial Sweeteners (Acesulfame K, Saccharin, etc.)

• Purpose: Flavor masking in supplements or drink mixes.
• Concerns:
  • Linked to gut microbiome disruption, insulin resistance, and metabolic dysfunction.
  • ​Suez J et al., Nature, 2014: Artificial sweeteners cause dysbiosis and glucose intolerance.

✅ Tips to Avoid Harmful Additives

• Look for “clean label” supplements — no additives, dyes, or artificial excipients.
• Choose capsules over tablets (tablets often require more binders).
• Seek brands that list “Other ingredients” transparently.
• Consider practitioner-grade supplements or third-party tested products.

I hope this list helps in selecting supplements that have “good” quality ingredients.

Have an awesome day!

Dr. Scott