What is Quicksilver Magnesium Hydroxide and who is it for?
Magnesium Hydroxide is a capsule-form magnesium supplement from Quicksilver Scientific, formulated specifically for people who experience occasional constipation or need to maintain bowel regularity while using binders like activated charcoal or bentonite clay. Each two-capsule serving delivers 700 mg of magnesium hydroxide, providing 266 mg of elemental magnesium.
This is particularly relevant for anyone following a gut or elimination protocol that includes binders, which are well known for slowing motility as a side effect of their intended action. Rather than adding a stimulant laxative, magnesium hydroxide works osmotically, drawing water into the intestinal lumen to increase stool volume and encourage movement. It’s a practical, well-tolerated tool for keeping things moving without disrupting the protocol itself.
Fairfield Nutrition Thoughts
Magnesium hydroxide is one of the most overlooked tools in gut and elimination protocols. It comes up most often in the context of binder use, where charcoal, bentonite, or zeolite are doing their job of binding compounds in the gut but simultaneously slowing motility as an unwanted side effect. Having a reliable, clean-formulated osmotic magnesium on hand makes these protocols significantly more manageable.
The evidence for magnesium hydroxide as an osmotic agent is well established and long-standing. It’s not a novel mechanism or emerging compound.
Why This Formulation / How It Works
Most magnesium forms used for bowel regularity are interchangeable at sufficient doses, but magnesium hydroxide has a particularly reliable osmotic action that makes it well suited to this specific application. Unlike stimulant laxatives that trigger muscle contractions, magnesium hydroxide works by drawing water into the intestinal lumen through osmosis. This increases the water content and volume of stool, which encourages movement through the colon via the body’s normal motility mechanisms.
Quicksilver’s formulation is straightforward: 700 mg of magnesium hydroxide per two-capsule serving, delivering 266 mg of elemental magnesium. The capsule uses plant-derived cellulose, and the formula is tested allergen-free, gluten-free, soy protein-free, and non-GMO. For a product used regularly within protocols that already place demands on the gut, a clean, minimal excipient list is a genuine advantage.
Osmotic Action in the Intestinal Lumen
Magnesium hydroxide is poorly absorbed in the small intestine, which means a significant portion reaches the colon intact. Once there, it draws water across the intestinal wall into the bowel lumen through osmotic pressure. This increased water content softens stool and increases its bulk, stimulating the normal stretch-and-move response of the colon.
Relevance to Binder Protocols
Binders like activated charcoal and bentonite clay bind compounds in the gut as intended, but they also bind water and can slow transit time noticeably. Adding magnesium hydroxide alongside binders helps counteract this effect, maintaining the regular transit that is itself important for gut microbiome composition and the excretion of bound materials.
When to Consider This
This formulation provides support for bowel motility and GI regularity. It makes sense if you’re:
- Using binders such as activated charcoal, bentonite clay, or zeolite as part of a gut or elimination protocol and noticing slower transit as a result.
- Working with a practitioner on a gut microbiome protocol where regular bowel movements are an explicit goal.
- Someone who tends toward sluggish digestion and wants a non-stimulant option for maintaining regularity during periods of dietary change or supplementation.
Supplement strategy: Magnesium hydroxide is typically introduced alongside or shortly after starting binders, rather than as a standalone first step. Many people find it useful for the duration of any protocol that includes binders, then reassess once that phase is complete. It can also be used independently of binder protocols for general bowel regularity support.
⚠️ Not suitable for: Pregnant or breastfeeding individuals without healthcare practitioner guidance, children (keep out of reach)
How to Use
The manufacturer recommends two capsules daily, or as directed by a healthcare professional. Each two-capsule serving provides 700 mg of magnesium hydroxide, which delivers 266 mg of elemental magnesium.
When using alongside binders, timing the magnesium hydroxide dose separately from the binder by an hour or two is reasonable practice, as magnesium could theoretically be bound alongside other compounds if taken simultaneously. Your practitioner may advise on specific timing within your protocol.
Quicksilver Scientific notes that one to two capsules taken when using binders may help maintain bowel regularity during those protocols, so dose can be adjusted within the two-capsule daily ceiling based on individual response and practitioner guidance.
Ingredients
Per 2 capsules (serving size):
Magnesium (from 700 mg of Magnesium Hydroxide): 266 mg (63% Daily Value)
Other ingredients: Plant-derived cellulose capsule, microcrystalline cellulose, organic carnauba wax
Allergen information: Tested allergen-free, gluten-free, soy protein-free, and non-GMO.
Common Questions
How is this different from other magnesium supplements I might already be taking?
Most magnesium supplements people take daily, such as magnesium glycinate or malate, are chosen for their high absorption into the bloodstream. Magnesium hydroxide works differently: it’s poorly absorbed, which means it stays in the gut and draws water into the intestinal lumen osmotically. These are genuinely different applications, and many people use both a well-absorbed form for systemic magnesium needs and magnesium hydroxide specifically for bowel regularity.
Can I take this at the same time as my binders?
It’s generally worth spacing them by an hour or two. Binders work by binding compounds in the gut, and taking magnesium hydroxide simultaneously could result in some of the magnesium being bound before it has a chance to act. Your practitioner can advise on timing within your specific protocol.
How quickly does it work?
Osmotic magnesium typically produces a response within six to twelve hours, though individual response varies. Starting with one capsule and adjusting based on response is a sensible approach if you’re new to this form.
Is this suitable for long-term daily use?
Magnesium hydroxide is generally well tolerated for ongoing use at the recommended dose. That said, if you find you need it consistently for regularity outside of a binder protocol, it’s worth discussing the underlying cause with your healthcare practitioner rather than relying on it indefinitely.
Warnings & Storage
Do not use if: Pregnant or breastfeeding without first consulting your healthcare practitioner.
Cautions: Keep out of reach of children. If you have any pre-existing digestive conditions or are taking medications, consult your healthcare professional before use.
Storage: Store at room temperature in a cool, dry place away from direct sunlight.
Always consult your healthcare professional before use if you have any pre-existing conditions or are taking medications.







