CULTURE
FUELS
GROWTH.

We prove it.

INFUSION by Castells is a leading multicultural marketing and advertising agency founded by Stanford MBA Liz Castells-Heard.

For 25+ years, Fortune 500 brands have trusted INFUSION to turn cultural fluency into consistent business growth by infusing it across strategy, analytics, operations, AI, and the marketing 5Ps.

Today, INFUSION continues future-proofing brands with Liz's kinetic visionary leadership alongside Leticia Juarez's steady insightful command, and a strategically creative powerhouse team.

Analytics-first. AI-Powered. Creatively fearless. Designed for growth.

No BS Just Results
About us

THE CULTURAL SHIFT

Welcome to the era of
Culturenomics.

Where cultural relevance is
The new growth engine.

The near-multicultural majority drives 100% of pop growth and an outsized share of consumer influence. For Multicultural audiences, culture isn't a layer or affinity—it's the lens. 90% prioritize culture in their identity and daily lives, shaping values, traits, behaviors, decisions, content and digital ecosystems. Relevance happens within their context, experiences, and what matters most.

And today, most consumers feel unseen in advertising——highest among Multiculturals—signaling a relevance gap. That's why brands that embed cultural fluency outperform. INFUSION fills that cultural intelligence gap which cannot be automated or faked: context, knowledge depth, nuance, judgment, authenticity, and cultivated lived experience.

INFUSION IS YOUR CULTURAL GROWTH PARTNER.