TrustMD

Yourbiology

Yourbiology is a direct-to-consumer, online-only supplement brand focused on gut-health and probiotic formulas. Its flagship line, “Gut+,” is sold in 30- and 60-capsule SKUs priced at mid-range levels—roughly $45–$70 per bottle—with subscription discounts of 15–25 %. The site also bundles complementary products such as prebiotic fiber and digestive enzymes, but all sales flow through the brand’s own storefront; no retail or third-party e-commerce listings are maintained. The company differentiates by pairing clinically documented probiotic strains (10–20 billion CFU counts) with a patented brown-seaweed “MAKTrek” delivery capsule that claims 250 % better survival through stomach acid. All formulas are non-GMO, allergen-free, manufactured in U.S. GMP-certified facilities, and supported by third-party lab certificates posted online. A 60-day money-back guarantee and free U.S. shipping reinforce the science-first positioning. Core buyers are health-conscious women aged 25–45 who track wellness metrics, follow gut-health influencers, and prefer “clean-label” solutions over pharmaceuticals. They value transparent ingredient lists, hormone-friendly strain profiles, and the convenience of monthly auto-ship. Marketing leans on educational email courses, TikTok micro-influencers, and before-and-after bloat-reduction testimonials. Yourbiology competes in the crowded mid-priced probiotic space against mass-market capsules and premium “personalized” microbiome programs. It stakes out middle ground: higher strain diversity than drugstore brands without the $80–$100 price tags or complex microbiome testing kits of boutique startups. The focus on female-specific digestive and vaginal strains, coupled with visibly posted lab assays, lets it claim both credibility and approachability.

Your gut deserves science, not just hype

Dr Stanfield

Dr Stanfield sells physician-formulated dietary supplements that focus on gut health, immune support and healthy aging. Single bottles run $35-$55 and 3-pack bundles drop the per-unit cost to the low-$30s, placing the line in the mid-range tier. All inventory is sold direct-to-consumer through drstanfield.com; no retail or third-party e-commerce listings are used. The brand’s point of difference is that every capsule, powder or soft-gel is designed by Dr. James Stanfield, a board-certified M.D. who publishes ingredient rationale and third-party lab certificates on each product page. Flagship SKUs include “Gut Restore” (a spore-based probiotic plus post-biotic blend) and “NMN + Resveratrol,” a two-capsule longevity combo that has driven most of the site’s five-star reviews. Core buyers are health-conscious adults aged 35-60 with discretionary income who research PubMed links before purchasing and value transparency over celebrity endorsements. They typically follow intermittent-fasting or bio-hacking routines and want small-batch, USA-made formulas from a single clinician rather than a conglomerate catalog. Competitors range from low-cost Amazon probiotics to premium longevity brands sold through subscription wellness platforms. Dr Stanfield differentiates by limiting the catalog to six SKUs, offering one-time purchases with no auto-ship default, and backing every batch with publicly viewable COAs linked to the exact lot number on the bottle.

One doctor's formulas, one batch at a time, complete transparency

1md

1md sells physician-formulated dietary supplements that fall into four core categories: gut & digestive health, joint & bone support, cardio & metabolic wellness, and immunity & organ-specific formulas. Single-bottle prices sit in the $40-$60 range, placing the line squarely in the premium tier; 3- and 6-bottle bundles cut the per-unit cost 15-30%. Distribution is online-only through 1md.org and Amazon, with no brick-and-mortar retail presence. The brand’s hook is “MD-developed, clinically dosed” positioning: every SKU lists its board-certified physician formulator, patented or trademarked ingredients (e.g., NovoSorb® curcumin, L. rhamnosus GG), and links to peer-reviewed studies. Flagship SKUs—BalanceMD probiotic, OsteoMD bone complex, and CurcuminMD Plus—regularly top Amazon’s best-seller lists in their sub-categories and carry 4.5-star-plus ratings from 10k-plus reviews. Core buyers are 35-65-year-old health-motivated adults with discretionary income who want evidence-based alternatives to OTC drugs and are willing to pay for transparent labeling and third-party testing. The brand voice emphasizes long-term vitality over quick fixes, appealing to consumers who track biometrics, follow functional-medicine podcasts, and prefer subscription convenience. 1md competes with both mass-market vitamin labels and upscale “doctor-branded” supplement houses; it differentiates by combining physician authorship, patented ingredients, and direct-to-consumer pricing that undercuts premium clinic-only lines while maintaining pharmaceutical-grade manufacturing (NSF/cGMP-certified Utah facility).

Doctor-formulated supplements that actually prove what they promise

Phylabiotics

Phylabiotics sells probiotic supplements and gut-health powders aimed at digestive, immune and metabolic support. Single-unit SKUs run $39–$59 (30-day supply) and bundled 3-month kits drop the per-unit cost to the low-$30s, placing the line squarely in the mid-range. Distribution is DTC only through phylabiotics.com; no Amazon, pharmacy or brick-and-mortar listings are operated. The brand formulates with 15–18 clinically referenced strains per capsule, quantified by qPCR to guarantee 60 billion CFU through expiry, and pairs the blend with organic prebiotic fiber. All lots are third-party tested for purity, allergens and glyphosate residue, and certificates of analysis are posted by batch number. Its best-known SKU, “Gut-Brain Symbiotic,” targets the microbiome–mood axis and accounts for roughly half of repeat orders. Core buyers are 25-45-year-old professionals who track macros, use wearable health tech and prefer subscription replenishment over store aisles. They value transparent labeling, science citations and eco-packaging (glass jars, carbon-neutral shipping) more than celebrity endorsements or flavor variety. Phylabiotics competes in the fast-growing direct-to-consumer microbiome space against other data-centric, subscription probiotic brands. It differentiates by publishing full lab data per lot, avoiding marketplace dilution, and keeping price points below premium-clinical competitors while staying above low-CFU grocery brands.

Gut science you can actually verify, delivered monthly to your door

• Organic

ResBiotic

ResBiotic sells microbiome-targeted nutraceuticals anchored by its flagship powdered synbiotic, resB®; a one-month supply is $79 ($2.63/day), placing the brand in the premium tier. Capsule SKUs for lung and gut support sit at $89–$99, while a 3-in-1 probiotic spray for kids retails for $39. All products are sold direct-to-consumer through resbiotic.com and Amazon; no brick-and-mortar retail. The company positions itself as the first line to combine clinically dosed probiotic strains with resveratrol and botanicals specifically chosen for respiratory–gut axis support. Every formulation is NSF-certified, dual-listed as both a dietary supplement and medical food, and supported by two peer-reviewed human studies conducted at major U.S. universities. This science-first stance is reinforced by transparent Certificates of Analysis and a medical advisory board of pulmonologists. Core buyers are 30-55-year-old health-optimizing professionals who track HRV, use wearables, and want drug-free ways to manage exercise-induced breathing issues or post-antibiotic recovery. The brand resonates with values of data-driven wellness, clean labels (vegan, non-GMO, allergen-free), and environmental responsibility via carbon-neutral shipping. ResBiotic competes in the fast-growing “precision probiotic” space against generic gut-only blends and mainstream respiratory supplements. It differentiates by coupling airway-specific strains with polyphenol science, publishing human data, and offering MD-staffed telehealth onboarding—moving the category from broad-spectrum gut support to targeted respiratory outcomes.

Breathe better, recover faster, backed by real science

• Vegan

Completewellness

Completewellness sells practitioner-grade vitamins, minerals, herbals, probiotics, and condition-specific blends, plus functional powders, omega-3s, and home-testing kits. Price points sit in the mid-to-premium tier—most SKUs fall between $25 and $75—with deeper discounts on 90-day supply bundles. Distribution is DTC e-commerce only; U.S. shipping is free above $50 and auto-ship subscriptions account for roughly half of volume. The company formulates exclusively with raw materials that hold USP or NSF verification, publishes COAs for every lot, and keeps a practicing ND advisory board on staff. Flagship lines include “Complete-Methyl B-Complex” and “Therbiotic 100B” probiotic, both repeatedly featured in practitioner protocols for methylation and microbiome support. A dynamic quiz engine maps symptoms to a personalized 3-product stack, driving average order values above $85. Core buyers are 30-55-year-old health-seekers who already use functional labs, track biomarkers, and want evidence-backed supplements without retail mark-ups. They value label transparency, third-party testing, and the convenience of consolidated dosing—90 % of customers report two or fewer daily packs after taking the quiz. Completewellness competes with both boutique “clean” e-commerce brands and large catalog vitamin houses by doubling down on practitioner credibility: ND-formulated SKUs, transparent certificates, and subscription savings that undercut clinic dispensing fees while still offering higher potencies than mass-market equivalents.

Practitioner-strength supplements without the clinic markup or guesswork

Acada Health

Acada Health sells physician-formulated dietary supplements that focus on metabolic, cognitive and gut health. The line is priced in the mid-to-premium tier—most SKUs run $40-$90 for a 30-day supply—and is available only through the brand’s own website, acadahealth.com, with subscription discounts of 15%. The brand’s point of difference is its “clinician-first” development model: every formula is designed by a US-licensed MD, third-party tested for purity, and released in limited micro-batches that carry lot-specific COAs. Flagship SKUs include GlucoAdapt (glucose-support blend), NeuroLift (nootropic complex) and ProbioSync (spore-based probiotic), each positioned as a targeted alternative to mass-market multis. Core buyers are 30-55-year-old professionals who track biomarkers with wearables or quarterly labs and want research-backed inputs without having to book a concierge doctor. They value transparency, clean labels and the ability to verify ingredient sourcing online before purchase. Acada Health competes in the direct-to-consumer, condition-specific supplement space populated by VC-backed wellness brands and influencer lines. It differentiates by anchaling product creation in practicing physicians rather than marketing personalities, publishing full lab panels and restricting distribution to its own site to maintain medical-grade handling.

The supplement your doctor would actually recommend

Huxhealth

Huxhealth sells science-backed daily supplements in capsule, powder and sachet formats covering gut health, immunity, sleep, stress, skin and women’s health. Price points sit in the mid-range tier: £20–£45 for a 30-day supply, with bundle discounts and monthly subscriptions. The brand is digital-first, trading only through its own UK site and Amazon storefront; no bricks-and-mortar stockists are listed. Formulas are built around clinically studied probiotic strains, bio-available vitamins and patented botanicals, all third-party tested and free from synthetic fillers. The line is vegan, allergen-free and shipped in recyclable aluminium and glass. Flagship SKUs include “Gut+” multi-strain probiotic/prebiotic blend and “Sleep+” magnesium-glycinate complex, both highlighted in editorial gift guides. Core buyers are 25-45-year-old professionals who track wellness metrics via apps and want convenient, evidence-based support for busy urban lifestyles. They value transparency—every batch certificate is QR-linked—and prefer subscription delivery to lock in 20 % savings and cancel anytime. Huxhealth competes in the crowded direct-to-consumer supplement space against other clean-label, subscription-based challengers. It differentiates by combining UK-manufactured, clinically dosed formulas with minimalist branding, lower price-per-gram than premium niche labels, and flexible subscription management that skips or cancels instantly without customer-service hurdles.

Science-backed supplements that actually fit your life and budget

• Recycled
• Vegan