U.S. Amazon Dietary Supplements: 2023 Market Intelligence

Executive Summary

Amazon (亚马逊) generated USD 9.6 billion in U.S. vitamins, minerals, and supplements (VMS) sales in 2023 — a +15.5% YoY gain that outpaced broader retail and confirmed the platform as the dominant channel for dietary supplement purchases in the United States. The market's most important structural characteristic is its fragmentation: the top 10 brands collectively hold approximately 10% market share, far below the 30–50% CR10 ratios typical of mature consumer goods categories. For brands — including Chinese cross-border sellers building international presence — this fragmentation signals a market where focused clinical positioning and platform-native marketing can generate category leadership in high-growth niches without needing to unseat dominant incumbents. Three subcategory trends define the current opportunity: digestive supplements at USD 740 million, gummy formats growing at +50% YoY to USD 660 million, and the ongoing premiumisation of mainstream vitamin formats driven by preventive health awareness among Millennial and Gen Z consumers.

The Global Market Backdrop: USD 176.2 Billion and Compounding

The U.S. Amazon story sits within a larger global growth narrative. The global dietary supplements market reached USD 176.19 billion in 2023 and is projected to reach USD 346.36 billion by 2032, a CAGR of 7.8% over the forecast period. This trajectory reflects a structural shift: supplementation is moving from a niche health behaviour to a preventive health norm across income cohorts and geographies.

North America anchors that growth. The U.S. dietary supplements market — the world's single largest — was valued at USD 66.75 billion in 2023 and is forecast to reach USD 132.04 billion by 2032 at a CAGR of approximately 8.90%, outpacing the global average. Two demographic forces drive the U.S. premium: an ageing Baby Boomer cohort with high supplement adoption rates, and a younger generational shift toward proactive preventive health, amplified by wellness content on social media and the normalisation of health-monitoring devices.

Within U.S. retail, Amazon's platform advantages — breadth of SKUs, verified review mechanisms, and the Subscribe & Save subscription programme — have cemented its lead over Walmart and Target in online VMS sales. The Subscribe & Save model, in particular, creates repeatable revenue streams with relatively low customer acquisition costs, a structural edge that favours supplement brands with strong Amazon listings and loyal review bases.

Category Landscape: Who Owns the 60%+ and Where the Growth Is

Vitamins, minerals, and herbal supplements together account for more than 60% of total U.S. Amazon VMS sales in 2023. Consumer familiarity with these core ingredient types — multivitamins, standalone vitamin D, vitamin C, and B-complex supplements — underpins the scale of these subcategories. This familiarity translates to high search volume, strong review density, and predictable repeat-purchase behaviour, making these subcategories defensible for established brands and high-volume for category leaders.

The standout growth story within the category is digestive supplements, which generated USD 740 million in 2023. Probiotics, prebiotics, digestive enzymes, and fibre supplements have all benefited from heightened consumer awareness of the gut microbiome's role in immunity, mental health through the gut-brain axis, and metabolic function. Probiotic research has crossed from clinical media into mainstream wellness content and influencer channels, creating sustained inbound consumer demand. This subcategory remains meaningfully underpenetrated relative to the broader VMS market, suggesting significant runway for both established supplement brands extending into digestive health and challenger brands entering around science-backed formulations.

The category also encompasses enzymes, amino acids, and herbal supplements — all with distinct demand profiles. Herbal supplements benefit from growing consumer interest in traditional and botanical health approaches; amino acids are closely linked to the sports nutrition and muscle recovery segment, which carries high intent and high average order values on the Amazon channel.

Brand Landscape: CR10 at ~10% Is the Market's Biggest Signal

Despite USD 9.6 billion in annual sales, the U.S. Amazon VMS brand landscape is highly fragmented. The top 10 brands — including Garden of Life, Pure Encapsulations, and MaryRuth Organics — collectively hold a CR10 market share of approximately 10%. In mature fast-moving consumer goods categories, CR10 ratios typically exceed 30–50%. That gap between VMS and typical category concentration is the market's most commercially significant structural feature.

This fragmentation is not temporary disorder — it reflects the genuine heterogeneity of supplement consumer demand. Health goals vary (immunity, energy, gut health, beauty), preferred dosage forms vary (capsules, gummies, powders), and lifestyle segments vary (sports performance, seniors, general wellness). No single brand can address all of these simultaneously at scale without losing positioning clarity. That diversity prevents winner-take-all dynamics and keeps the door open for focused challengers to build meaningful category share in targeted niches.

For brands considering cross-border expansion from China into U.S. Amazon, this competitive structure is a meaningful signal. Unlike categories with entrenched dominant players requiring massive spend to displace, the VMS market rewards clinical differentiation, formulation specificity, and platform content quality. A well-positioned brand in a defensible subcategory — digestive health, women's wellness, or sports amino acids, for example — can capture disproportionate share relative to investment.

Format Innovation: Gummies at +50% YoY Reshape the Dosage Landscape

Capsules retain the largest single format share at 47% of the U.S. Amazon VMS market. Their dominance reflects decades of manufacturing scale, established efficacy profiles, shelf-stability advantages, and unit economics that favour high-volume supplement production. Tablets, softgels, and powders hold additional share in the traditional format segment.

However, gummy supplements are reshaping the competitive dynamic. Gummy sales on U.S. Amazon reached USD 660 million in 2023 at over +50% YoY growth — the highest rate among all dosage forms. A Harris Poll survey quantifies the behaviour change: 28.0% of U.S. adults tried vitamin gummies in the past year, and of those, 53.0% reported daily use. That conversion rate from trial to sustained daily habit is unusually high for a new dosage format innovation and reflects a genuine behavioural driver: gummies eliminate the psychological friction of supplement-taking as medication, broadening the addressable consumer base to include individuals who resist traditional pill formats.

The format also carries brand identity advantages. Gummy supplements are inherently visible, shareable, and photogenic — attributes that translate directly into social content performance and gifting behaviour, both meaningful demand drivers in the Amazon channel. Brands with incumbent positions in capsule formats now face a clear strategic choice: extend credibly into gummy or liquid formats, or accept incremental category share erosion as consumer preference continues to shift toward accessible, habit-friendly dosage forms.

Liquid supplements and functional food formats represent the next innovation frontier. Manufacturers are beginning to allocate R&D resources to stable, palatable liquid innovations — a development that will put further pressure on traditional format categories over the next three to five years.

Key Takeaways

• The U.S. Amazon VMS market generated USD 9.6 billion in 2023 at +15.5% YoY, cementing Amazon's lead over Walmart and Target in online supplement sales.
• The global dietary supplements market reached USD 176.19 billion in 2023 and is projected to reach USD 346.36 billion by 2032 (CAGR 7.8%); the U.S. alone is forecast to grow at 8.90% CAGR to USD 132.04 billion by 2032.
• Vitamins, minerals, and herbal supplements command 60%+ combined category share; digestive supplements — probiotics, prebiotics, digestive enzymes — are the fastest-gaining subcategory at USD 740 million.
• Gummy supplements reached USD 660 million in 2023 at +50% YoY, converting 53.0% of first-time users to daily habits; capsules retain 47% format share but face mounting competition.
• CR10 of approximately 10% — far below the 30–50% norm in mature FMCG categories — signals structural fragmentation and disproportionate opportunity for focused entrants.

About the Data

This analysis draws on Moojing Market Intelligence data tracking the U.S. Amazon dietary supplements market. Moojing Market Intelligence (魔镜洞察) monitors sales performance, brand rankings, and consumer demand signals across major e-commerce platforms globally. Sales and unit data are sourced from MoAnalysis, Moojing's cross-border e-commerce analytics platform, covering the full 2023 calendar year on amazon.com. Consumer survey data sourced from Harris Poll.