Pharmacist-Reviewed Supplements Designed for People Taking Medications
RYOS Vitamins are developed with medication awareness in mind—helping adults make more informed choices when combining supplements with prescription or over-the-counter medications.
Most Supplements Aren’t Designed for People Taking Medications
Three out of four adults in the U.S. live with a chronic condition. Most rely on medications to manage their health and also use supplements to ease side effects, fill nutritional gaps or boost wellness. Yet few understand drug-nutrient interactions or supplement safety.
A Medication-Aware Approach to Supplements
That’s why we created RYOS. RYOS was created to bridge the gap between traditional supplement brands and medication-aware wellness. Our pharmacist-review process evaluates each formula for common drug-nutrient interactions to support more informed supplement choices. Because we believe supplements shouldn’t work against your medications. With transparency, third-party testing, and clean ingredient sourcing, they should work with them, helping you reclaim your original self.
Who RYOS is Designed For
Adults taking prescription medications
Individuals managing chronic conditions
People seeking supplements with greater transparency
Those concerned about supplement and medication interactions
How it Works
1. Ingredient Review
We assess commonly used supplement ingredients for known interactions with medications.
2. Medication Category Awareness
We consider how ingredients may interact with widely used medications such as blood thinners, antidepressants, and thyroid treatments.
3. Real-World Use Focus
We evaluate how supplements may fit into everyday routines for adults managing medications.
Explore RYOS
Browse our pharmacist-reviewed supplements, designed with medication awareness in mind.
Meet our Founders
Sunny Chow, RPh — Co-Founder, RYOS Vitamins
Sunny Chow is a registered pharmacist (RPh) with over 20 years of experience in medication management, drug–nutrient interactions, and patient education. She is the co-founder of RYOS Vitamins, where she leads supplement review and helps ensure each formulation is evaluated with medication safety and real-world use in mind.
She earned her Bachelor of Science in Pharmacy from St. John’s University and has practiced across hospital settings, retail pharmacies, independent pharmacies, and long-term care environments. Throughout her career, she has focused on patient wellness with her thoughtful and knowledgeable guidance on the use of prescription medications, over-the-counter drugs, and dietary supplements.
Her expertise includes reviewing potential interactions between commonly prescribed medications (such as blood thinners, antidepressants, thyroid medications, and diabetes treatments) and widely used supplement ingredients including magnesium, vitamin K, herbal extracts, and digestive enzymes. She is also certified to administer immunizations and remains actively engaged in patient care.
At RYOS, Sunny applies a medication-first lens to supplement evaluation—bridging pharmacy expertise with everyday wellness decisions. Her approach emphasizes clarity, safety, and practical guidance for adults who want to make informed choices when combining supplements with medications.
Nancy Chan, MBA — Co-Founder, RYOS Vitamins
Nancy Chan is a brand and product strategy leader with over 30 years of experience building consumer brands, including more than six years in the dietary supplement industry. As co-founder of RYOS Vitamins, she leads brand development, product positioning, and consumer experience, helping translate complex health concepts into products that are clear, trustworthy, and accessible.
Prior to RYOS, Nancy served as CEO of a nationally distributed supplement brand, where she led the successful launch of a new brand in a highly competitive category. Her experience spans both new brand launches and scaling established businesses, with a focus on creating products that resonate with consumers.
At RYOS, Nancy works closely with the clinical review process to ensure that pharmacist-reviewed formulations are paired with clear, transparent communication—so customers not only have access to better products, but also understand how to use them confidently.