OERsterk

What OERsterk does

OERsterk B.V. is a Dutch lifestyle platform for vitality and chronic-disease prevention, founded and operated by Dr. Richard de Leth, who obtained his doctorate in medicine in 2007 and ran a Praktijk voor Integrale Geneeskunde for more than ten years, guiding 4,000 patients. The platform packages his integrative methodology — built on evolutionary medicine combined with Western science and Eastern traditions — into a multi-product ecosystem that includes digital health programs (De Gouden Gezondheidsgids, Jouw Reddingsplan, Het Gezondheidsvirus, Gezond in 4 weken, De geheime vitaliteitsformule), self-published books (13 bestsellers including Zielsgelukkig), a certification-driven Academy, and a directory of trained OERsterk Coaches.

The core technology layer is the OERsterk Method, a structured and measurable system for daily vitality and self-healing, supported by a large content footprint: a weekly newsletter reaching 100,000+ subscribers, 189+ podcast episodes, blog libraries, and theatrical performances (OERsterk TheatertOER with 25,000+ visitors). The Coach Network, scaled via the Academy between 2019 and 2024 to nearly 1,000 certified practitioners, constitutes the asset that extends the founder's clinical expertise into distributed service delivery across the Netherlands.

The business model is direct-to-consumer e-commerce plus certification revenue. Customers purchase books and digital programs directly via oersterk.nu, with payment available in 1, 3, or 10 installments and a €99 registration fee plus €195 exam retake fee on the Academy pathway. Free content (blogs, podcasts, newsletter, GezondheidsCheck, supplementation masterclass) functions as top-of-funnel engagement, while an affiliate program provides additional distribution. The company is privately held, bootstrapped, single-jurisdictional (Netherlands), and in 2025 ceased active operations when the founder stepped back and redirected audiences to richarddeleth.com.

Name

OERsterk

Legal name

OERsterk B.V.

Website

https://oersterk.nu

Company type

Private

Founded year

2007

Operating status

Closed

Headcount range

11–50 employees

Short description

OERsterk B.V. is a Dutch direct-to-consumer lifestyle platform that packages founder Dr. Richard de Leth's integrative vitality methodology into digital programs, books, and a coach-certification academy serving health-conscious Dutch consumers.

Ownership category

akta.pro rank

Headquarters

HQ city

Heemskerk

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Marketing or Sales, Operations, Technology or R&D, Others

Revenue model

1. Education and Certification Programs: OERsterk Academy offers multi-level training programs for becoming an OERsterk Coach. Programs include online learning environments, exams (Level 1, 2, 3), and certifications. Payment options include 1, 3, or 10 installments. A €99 registration fee and €195 exam retake fee apply.
2. Books and Digital Products: Sale of health and lifestyle books (bestsellers) including titles like 'Zielsgelukkig = Kerngezond' and digital programs such as De Gouden Gezondheidsgids, Jouw Reddingsplan, and Het Gezondheidsvirus.
3. Affiliate Program: OERsterk operates an affiliate marketing program where partners can promote products and earn commissions.
4. Coaching Network: Nearly 1000 independent OERsterk Coaches trained through the Academy provide coaching services to end consumers, creating a distributed service network.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

OERsterk is a Dutch lifestyle and preventive-health platform selling digital health programs, books, and a multi-level coach certification (OERsterk Academy). It distributes these through its own e-commerce sites and a network of nearly 1,000 certified OERsterk Coaches who deliver the OERsterk Method — a vitality system grounded in evolutionary medicine, Western science, and Eastern traditions — to individual consumers in the Netherlands.

Product overview

OERsterk is a Dutch lifestyle platform for vitality and health founded by Richard de Leth (drs. medicine, 2007). The platform operates as a multi-product ecosystem combining digital health programs, educational content, a coach certification program, and free wellness resources. Core paid offerings include digital products (De Gouden Gezondheidsgids, Inspiratiepakket, Jouw Reddingsplan, Het Gezondheidsvirus, Gezond in 4 weken, De geheime vitaliteitsformule, Zielsgelukkig book), the OERsterk Academy which trained nearly 1000 coaches (2019-2024), and a network of certified OERsterk Coaches. Free offerings include the GezondheidsCheck, masterclasses, blogs, podcasts (189+ episodes), and a newsletter with 100K+ subscribers. The platform ceased active operations in 2025 with Richard de Leth transitioning to new projects via richarddeleth.com.

Differentiator

Problem solved

Functional benefit

Products and services

• De Gouden Gezondheidsgids A comprehensive digital health guide sold through the OERsterk checkout, providing consumers with a structured roadmap to improve vitality and lifestyle based on the OERsterk Method.
• Inspiratiepakket A paid inspiration package focused on healthy eating and dietary guidance, distributed as a digital product to consumers seeking practical nutrition support.
• Jouw Reddingsplan A paid digital "rescue plan" product designed to help consumers get back on track with their health through the OERsterk methodology.
• Het Gezondheidsvirus A paid digital product focused on transmitting healthy lifestyle messages to consumers in an engaging, shareable format.
• Gezond in 4 weken A paid 4-week health program that guides consumers through a structured health improvement journey using the OERsterk Method.
• De geheime vitaliteitsformule A paid online training program teaching the OERsterk "secret vitality formula" for daily energy and long-term wellness.
• Zielsgelukkig A paid bestselling book on seven spiritual laws for health, teaching consumers how body, mind, and soul are connected, sold through oersterk.nu and external retailers.
• OERsterk Academy A paid multi-level coach training and certification program (Levels 1, 2, 3) offered online with installment payment options (1, 3, or 10 installments), a €99 registration fee, and €195 exam retake fee, certifying participants as OERsterk Coaches.
• OERsterk Coaches Netwerk A network of nearly 1,000 certified OERsterk Coaches delivering vitality coaching services to end consumers using the proprietary OERsterk Method; coaches operate independently under the OERsterk brand.

Quantifiable outcome

• Guided 4,000 patients to better lives over 10+ years
• +2 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• Chateau MarquetteminorOthersChateau Marquette is mentioned as a venue/location for participants of the OERsterk Coach training program, serving as a venue partner for in-person training sessions.

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Holland & Barrett: A major UK/European health-food and wellness retailer with deep Netherlands presence, combining supplements, free in-store health consultations, and a content library. Comparable to OERsterk as a broad incumbent in the Dutch health/wellness category.
• AG1 (Athletic Greens): A global direct-to-consumer nutritional supplement brand built around a flagship daily-health product, a heavy content and podcast presence, and subscription revenue. Comparable to OERsterk in its content-first, founder-narrative-driven D2C health model.
• FoodSpring: A Berlin-based direct-to-consumer sports nutrition and healthy-lifestyle brand combining premium products with editorial content, training guides, and ambassador networks. Comparable to OERsterk in its content-led, founder-anchored European health/lifestyle positioning.
• Thorne: A US-based premium supplement and health-content brand that pairs practitioner-grade products with educational resources, podcasts, and a certified-practitioner affiliate network. Comparable to OERsterk in monetizing a methodology through content, training, and a practitioner ecosystem.

Direct peers

• Practice Better: A practice management and client engagement platform built specifically for health and wellness coaches, nutritionists, and integrative practitioners. Comparable to OERsterk in serving health-coaching professionals with educational content, certification pathways, and consumer programs.
• SimplePractice: A leading practice management platform for health and wellness practitioners that combines scheduling, documentation, telehealth, and educational resources. Comparable to OERsterk in its coach/practitioner enablement model and integrated health-content ecosystem.

Emerging players

• Tony Robbins: A personal-brand-led performance and health coaching empire offering events, books, digital programs, and a partner network of facilitators. Comparable to OERsterk in the founder-anchored model, bestseller-driven brand, and event/theater-led customer acquisition.
• Dr. Mark Hyman: A personal-brand functional-medicine platform built around a physician-founder, with bestselling books, courses, a podcast, and a practitioner community. Comparable to OERsterk in its doctor-anchored, methodology-led health-content and education ecosystem.

Regional players

• Body & Fit: A Netherlands-based supplements, sports nutrition, and healthy-food e-commerce retailer with an active content and community platform. Comparable to OERsterk as a Dutch-headquartered direct-to-consumer wellness platform with a strong content engine.

Others

• Tim Ferriss: A personal brand built around bestselling self-optimization books, a long-running podcast, and curated newsletter audience. Comparable to OERsterk in the founder-led, content-first, audience-monetization playbook.

Market position

Strengths3 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/OERsterk
• YouTubeyoutube.com/channel/UCMiMoSFTl0P4bqK9hUP8UCw
• Facebookfacebook.com/oersterk.nu
• LinkedInlinkedin.com/company/oersterk
• Instagraminstagram.com/richarddeleth

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OERsterk