Oxide, sulfate, glycinate, citrate — how to pick the right one.
Magnesium is one of the most-deficient minerals in modern diets and one of the most-confusing supplements to buy. "Magnesium" alone tells you almost nothing — what matters is what it's bonded to. The counter-ion changes the absorption, the side effects, and what the supplement is actually good for.
Magnesium oxide — the colon-flush form
Magnesium oxide is poorly absorbed in the gut. Counter-intuitively, that's a feature, not a bug, if your goal is osmotic laxation. The unabsorbed magnesium pulls water into the colon, producing a gentle bowel movement. That's why Vivid's Colon Flush uses magnesium oxide — it's the right tool for that specific job.
It's the wrong tool if you want to raise your serum magnesium levels for muscle, sleep, or anxiety reasons. Most of what you swallow doesn't make it into the bloodstream.
Magnesium sulfate (epsom salt) — the bath form
Epsom salt is magnesium sulfate. Whether magnesium absorbs meaningfully through skin is debated — the body of evidence is mixed. But warm-water immersion plus the muscle-relaxation ritual produces real benefits regardless of how much magnesium technically crosses the skin barrier.
Don't ingest epsom salt orally without medical guidance — at oral dose it's a powerful osmotic laxative that's hard to titrate.
Magnesium citrate and glycinate — the systemic forms
For raising serum magnesium — for sleep, muscle tension, blood pressure, anxiety, restless legs — you want citrate or glycinate. Citrate is well-absorbed and slightly laxative at high doses. Glycinate (bisglycinate) is the gentlest on the gut and the form most associated with sleep benefit, because glycine itself is a calming amino acid.
Vivid's Bone Supreme uses magnesium citrate and magnesium phosphate as part of its bone-support stack. The citrate gives you systemic magnesium for bone mineralisation; the phosphate is paired with calcium for the bone matrix itself.
So what should you actually take?
- Constipation, occasional gut reset: Colon Flush (magnesium oxide)
- Muscle recovery, sleep ritual, post-workout soak: Epsom Salt (sulfate, bath only)
- Bone matrix, osteoporosis support: Bone Supreme (citrate + phosphate, alongside calcium and cofactors)
- Daily systemic magnesium for sleep or muscle tension: Magnesium glycinate (not in the Vivid range — yet)
The label matters. "Magnesium 400 mg" without specifying the form is a marketing trap — the same number can mean radically different things depending on what's actually in the capsule.
