Jeremy Ethier

Built With Science is Jeremy Ethier's own fitness brand, operating under the @builtwithscience handle, through which he sells personalized training and nutrition plans. It is his primary business beyond YouTube ad revenue and brand sponsorships. The brand is built around his core philosophy of applying peer-reviewed exercise science to practical, everyday training.

Yes, Jeremy Ethier holds a university degree in Kinesiology, which he completed in Canada where he is based in Vancouver. He regularly references this credential to distinguish his content from typical gym influencers who rely on personal anecdote rather than academic grounding. That educational background is a central pillar of his science-first brand identity.

Jeremy Ethier holds certifications from NASM (National Academy of Sports Medicine) and FMS (Functional Movement Screening), on top of his Kinesiology degree. He cites these credentials throughout his content as evidence that his programming recommendations are rooted in exercise science rather than gym culture or bro-science. This credentials-forward approach is a large part of what separates him in a crowded fitness YouTube space.

In one of his most talked-about videos, Jeremy Ethier trained one side of his body exclusively with heavy weights and the other side with lighter weights for a full 60 days, then measured the differences in muscle and strength gains. Using his own body as a controlled study is a signature content format he returns to repeatedly. He presents results alongside references to sports science literature, keeping the format consistent with his overall science-backed channel approach.

Jeremy Ethier uses the phrase "world's most boring diet" to describe a deliberately simple, repetitive eating structure designed to eliminate decision fatigue and make fat loss more sustainable long-term. The framing is intentionally contrarian — he argues that effective nutrition doesn't need to be complex or trendy, just consistent. It fits neatly into his broader content philosophy of prioritizing what the research supports over what is marketable.

Jeremy Ethier structures many of his most popular videos as controlled personal experiments — comparing training variables, testing diets for set periods, or running head-to-head protocol comparisons on himself — because it translates abstract research findings into concrete, visual before-and-after results. He has described this approach as a way to make exercise science tangible and relatable for a general audience. Experiment-format videos appear consistently among his top-performing content on YouTube.

Prenuvo is a private full-body MRI scanning company that screens for early signs of cancers, aneurysms, and other internal conditions without using radiation. Jeremy Ethier partnered with Prenuvo in a sponsored integration that aligns naturally with his health-optimization and evidence-based brand positioning. The partnership is notable because it skews toward medical health-tech rather than the supplement deals that dominate fitness influencer sponsorships.

Jeremy Ethier's main differentiator is that he grounds every training and nutrition recommendation in published exercise science research, frequently citing studies on-screen rather than relying on personal experience or popular gym wisdom. His Kinesiology degree and NASM and FMS certifications are central to that positioning. The approach has attracted an audience that is specifically looking for research-backed guidance rather than motivation-first or aesthetic-first content.

Jeremy Ethier is Canadian and is based in Vancouver, British Columbia, which he mentions directly in his YouTube channel description. Canada is his second-largest audience country, though the majority of his viewers are based in the United States. His Built With Science business also operates out of Vancouver.

Jeremy Ethier has well over 7 million subscribers on YouTube, placing him firmly in the Mega tier for fitness content creators globally. YouTube is by far his largest platform, with Instagram and TikTok serving as secondary channels. His engagement rate on YouTube runs well above the category average for creators operating at his scale.