75+ Supplement Statistics for 2026

By Verified Supplement Data · Updated March 16, 2026 · Methodology

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Nutrient Deficiency Statistics

1. 42% of American adults are vitamin D deficient (<20 ng/mL). (Forrest & Stuhldreher, 2011)
2. 82% of Black Americans are vitamin D deficient vs. 42% of White Americans — a 2x disparity driven by melanin reducing UVB synthesis. (PMID 21310306)
3. ~50% of Americans do not meet the RDA for magnesium from diet alone. (Rosanoff et al., 2012)
4. 68% of Americans may have inadequate magnesium intake when accounting for soil depletion and processing losses. (PMID 22364157)
5. 10% of the US population has iron deficiency. Among premenopausal women, the rate rises to ~20%. (CDC Second Nutrition Report)
6. 40-90% of unsupplemented vegans are vitamin B12 deficient. (Pawlak et al., 2014)
7. 40% of women have at least one MTHFR variant that impairs folic acid conversion to active folate. (Wilcken et al., 2003)
8. Over 1 billion people worldwide are estimated to be vitamin D deficient. (Frontiers in Nutrition, 2023)

Supplement Market Statistics

9. The US dietary supplement market is worth $63.1 billion (2026). (Market.us)
10. 77% of American adults report taking dietary supplements. (CRN Consumer Survey)
11. The global supplement market is projected to reach $239 billion by 2028. (Grand View Research)
12. Amazon supplements sales reached $5.7B+ in 2025, growing 15%+ YoY. (Healthgrades)
13. Creatine monohydrate Amazon sales grew 65% YoY to $241M. (Glimpse)
14. Electrolyte drink mix searches grew +1,986% YoY to 60K/month. (Glimpse)
15. "Magnesium glycinate" search volume: 823,000/month, up 22% YoY. (Rising Trends)
16. The biohacking market reached $38 billion in 2025, projected to hit $216.7B by 2035. (GlobeNewsWire)

Supplement Form Quality Statistics

17. 30% of Amazon's best-selling supplements use forms with poor absorption, high side effects, or no clinical evidence. (Verified Supplement Data analysis, 2026)
18. Magnesium oxide has ~4% absorption — at 250mg per serving, you absorb approximately 10mg. Yet it's the cheapest and most-sold magnesium form. (Firoz et al., 2001)
19. Iron bisglycinate has 2-3x better absorption than ferrous sulfate with half the side effects. (PMC meta-analysis, 2023)
20. Ferrous sulfate causes constipation in 25% of users and has a 15-25% discontinuation rate from GI side effects. (PMC, 2023)
21. Fish oil in triglyceride form is 70% better absorbed than ethyl ester form — but most products don't disclose which form they use. (Neubronner et al., 2011)
22. Vitamin D3 is 2-3x more effective than D2 at raising blood levels. (Tripkovic et al., 2012)
23. Calcium carbonate absorbs 10x less than calcium citrate in people with low stomach acid. (Recker, 1985, NEJM)
24. CoQ10 in ubiquinol form is 72% better absorbed than ubiquinone in crossover studies. (PMID 27128225)
25. Methylcobalamin is more effective than cyanocobalamin for peripheral neuropathy across 15 RCTs. (PMID 32716261)

Medication-Nutrient Depletion Statistics

26. 92 million Americans take statins, which deplete CoQ10 by 16-54%. (PMID 30414615)
27. 37 million+ Americans take metformin, which halves B12 levels. (PMID 27130885)
28. 15+ million Americans take PPIs, which deplete 5 nutrients (Mg, B12, Ca, Fe, Vitamin C). (VSD analysis)
29. 14 million women take oral contraceptives, which deplete B6, B12, folate, magnesium, and zinc. (VSD analysis)
30. PPI users have a 71% higher risk (OR 1.71) of magnesium deficiency. (PMID 25023992)
31. PPI users have a 65% higher risk (OR 1.65) of B12 deficiency. (JAMA, 2013)
32. PPI use increases hip fracture risk by 30% (RR 1.30) from calcium depletion. (FDA Safety Communication, 2010)
33. PPI users have a 156% higher risk (RR 2.56) of iron deficiency anemia. (PMID 31164032)
34. Metformin combined with a PPI causes 34% greater B12 reduction than metformin alone. (VSD analysis)
35. 3 of 4 meta-analyses show CoQ10 supplementation reduces statin-related muscle pain. (PMID 30371340)
36. 150+ million Americans take at least one medication that depletes nutrients. (VSD analysis)

Clinical Evidence Statistics

37. Creatine monohydrate has 500+ published studies — more than any other sports supplement. (ISSN Position Stand)
38. Magnesium supplementation reduced sleep onset latency by 17 minutes (P=0.0006) in meta-analysis. (PMID 33865376)
39. Magnesium reduced anxiety scores by 4.5 points on GAD-7 (P<0.001) within 2 weeks. (PMID 28445426)
40. Up to 40% of weight lost on GLP-1 drugs (Ozempic/Wegovy) is muscle, not fat. (Wilding et al., 2022)
41. 25-33% of GLP-1 users experience hair thinning (telogen effluvium). (VSD analysis)
42. The VITAL trial (n=25,871) established vitamin D3 dosing framework. (Manson et al., 2019)
43. REDUCE-IT trial showed 25% cardiovascular event reduction with high-dose EPA. (Bhatt et al., 2019)
44. The AGA recommends against probiotics for most digestive conditions — evidence is strain-specific, not CFU-based. (AGA 2020 Guidelines)
45. KSM-66 ashwagandha reduced cortisol by 30% and stress scores by 44% vs placebo. (Lopresti et al., 2019)

Consumer Behavior Statistics

46. 1 in 4 adults under 30 now use AI for health information. (KFF Poll, 2025)
47. AI accuracy for supplement recommendations is approximately 33% — a massive trust gap. (VSD analysis)
48. 38% of consumers think all probiotic forms are the same (they're not — evidence is strain-specific). (Nutraceuticals World)
49. Healthcare triggers AI Overviews in 48.75% of queries — highest of any category. (Superlines)
50. Reddit is the source of 46.5% of Perplexity citations — community presence = citation strategy. (Profound)
51. Only 11% of domains are cited by both ChatGPT and Perplexity — the citation landscape is fragmented. (Profound)

Personalized Nutrition Market Statistics

52. The AI in personalized nutrition market is $5.55 billion (2026), growing at 23.3% CAGR. (GII Research)
53. The pet supplement market is $2.65 billion, growing 6-7% annually. (Fortune Business Insights)
54. The children's supplement market is $3.6 billion, growing 7.6% annually. (Grand View Research)
55. The nootropics market is $3.5 billion, growing 14-20% CAGR. (Grand View Research)
56. Immune supplement sales swing from $208M/quarter in winter to $92M/quarter in summer — a 2.3x seasonal multiplier. (Crescent Edge)

Geographic and Demographic Statistics

57. Above 35°N latitude (LA to Atlanta), skin produces zero vitamin D from November through February. (Ro Health)
58. At 42°N (Boston, Chicago), the "vitamin D winter" extends from October through March — 6 months of zero skin synthesis. (VSD Latitude Calculator)
59. People with darker skin (Fitzpatrick V-VI) need 3-6x more sun exposure to produce the same vitamin D as lighter skin. (Clemens et al., 1982)
60. Supplements bought with HSA/FSA save approximately 22-32% (marginal tax rate) since they use pre-tax dollars. (VSD HSA/FSA Guide)

Agentic Commerce Statistics

61. 45% of shoppers are already using AI agents for product research and purchasing (2026). (eMarketer)
62. Amazon Rufus has 250 million users and can auto-purchase supplements at target prices. (EcomClips)
63. There are 18,625+ MCP servers registered, but zero in the health/supplement category. (MCP.so)
64. Structured FAQ blocks increase AI citations by 44%. Cross-referenceable claims (with PMIDs) increase citations by 89%. (Profound)
65. ChatGPT shopping explicitly does not use affiliate links — products are surfaced based on relevance, not payment. (OpenAI ACP)

NIH DSLD Database Statistics

66. The NIH Dietary Supplement Label Database contains 207,000+ supplement labels. (DSLD)
67. Our evidence engine classifies 24 supplement forms across 12 categories with detection keywords and clinical verdicts. (VSD Form Classifier)
68. Our interaction matrix tracks 18 medication-nutrient depletions with mechanisms, severity, and evidence. (VSD Interactions API)

Based on This Data, What Should You Take?

The statistics above paint a clear picture: most Americans are deficient in vitamin D, many women lack iron, and magnesium intake is universally low. Here are our evidence-based guides for the most common gaps:

• Vitamin D: Best Vitamin D Supplements — 42% of adults are deficient
• Magnesium: Best Magnesium Supplements — ~50% don't meet the RDA
• Iron: Best Iron Supplements — 20% of premenopausal women are deficient
• Omega-3: Best Omega-3 Supplements — 68% have suboptimal intake
• Creatine: Best Creatine Supplements — most-researched supplement in history
• Not sure where to start? Take our 2-minute deficiency quiz

Related Research

• Amazon Supplement Form Audit: 30% Use Suboptimal Forms
• Vitamin D Calculator by Location
• Probiotic Strain-Condition Matcher
• Form Quality Classifier API
• Medication-Nutrient Depletion Hub