Seima
Health & Wellness Brand
About Seima
Seima is a Mexican supplement brand that starts where a lot of others stop: with the evidence. It was founded in 2020 by Regina, a nutritionist, and her husband Bernardo, and the name says most of it, because Seima means family. The idea from day one was to be there for the different stages of a household, with a formula for each moment and each person in it, and to do it in a way where nobody has to guess what they’re taking.
The brand grew out of a question Regina asked herself every day in her practice. She started her career in high performance, managing supplementation for young athletes, and later opened a private practice, where she kept running into the same thing: she couldn’t find supplements she felt confident recommending, because the labels were vague, the doses didn’t match what the evidence said and the information only ever told half the story.
Over time she stopped seeing it as a frustration and started seeing it as something someone needed to fix. For its first few years Seima was a part-time project while she ran another company, until she decided to close it and give Seima her full attention. That same year the Magnesium Blend came out, and it’s still the brand’s best seller.
The thing about Seima is that the science isn’t the sales pitch, it’s the starting point. Every formula begins with a look at what’s actually backed up, which ingredients have shown a real benefit and at what dose, and only then come the raw materials: where they come from, how good they are and whether their origin can be traced. The Omega 3, for example, uses anchoveta oil from the South Pacific, and on top of that an independent third party verifies the species, the origin and the authenticity of the oil. In other words, what the label says is what’s in the bottle, and it isn’t only the brand saying so.
Working this way means saying no a lot. Seima won’t cut the concentration of an ingredient to bring the price down or add ingredients in token amounts just so a formula looks more complete, and it doesn’t chase trendy ingredients that can’t back themselves up. In Mexico, independent lab testing is still uncommon because it makes the product more expensive, and Seima would rather absorb that cost. It’s a category full of noise, where nobody explains the price differences and people end up choosing based on what they saw online, and Seima goes the other way: being able to explain why every ingredient is there and why at that dose, and answering with evidence whenever someone asks.
Fernanda Quiroga is central to that work. She and Regina met at a wedding and over the years built a friendship around everything they have in common, since both are nutritionists, mothers and business owners. Fernanda specializes in functional nutrition, hormones and pregnancy, and at Seima her job is to research and study the evidence behind every formula.
You can feel all of this before you even open the product. The packaging is clean and easy to understand, with nothing there just to grab your attention, and the same rigor that goes into the formula shows up in the label, the design and the way the brand talks. The powders, like the Magnesium Blend or Seimalytes, their electrolytes, taste good and have a nice texture, which matters more than it sounds, because with supplements what counts is consistency. Nobody feels anything after the first scoop; what Seima is after is making them an easy habit to keep, every single day.
Seima is for people who read labels: the person who does the research, questions ingredients and wants to understand what they’re taking and why, and also for the nutritionists, doctors and other specialists who go over a formula closely before recommending it. A lot of the time, trust in the brand starts right there, with a recommendation from someone who knows, and the idea is to keep it that way: supplements that go hand in hand with a health professional, never in place of one. It isn’t a brand for anyone looking for a shortcut, but for people who would rather understand before they choose.
What drives that person goes beyond themselves, too. Taking care of yourself today is also a way of showing up for the people you love, being there for your kids, looking after your parents and arriving well at whatever comes next. That’s why Seima makes sense at very specific moments, like becoming a parent, starting to notice the changes that come with age or simply deciding to take ownership of your long-term health. Regina knows this firsthand: she and Bernardo have three children, all born during the same years the brand was being built, and she calls Seima her fourth baby.
In the end, what Seima wants is pretty simple: for a family to trust what they’re taking, and to know exactly why.