# Manganese Bisglycinate

> Manganese is an essential trace mineral and the cofactor for SOD2 (mitochondrial antioxidant), glycosyltransferases (the enzymes that build glycosaminoglycans for connective tissue), and prolidase (the enzyme that recycles proline for new collagen), all directly relevant for hEDS. ZebraThrive uses 4 mg elemental daily, paired with copper in the AM stack to support balanced trace mineral status.

**Page:** https://www.wellnessforzebras.com/ingredients/manganese-bisglycinate
**Brand:** ZebraThrive
**Author:** Ken Chapman, Founder of ZebraThrive
**Last reviewed:** 2026-05-11
**Daily dose:** 4mg elemental manganese daily (AM capsules)
**Form used:** Manganese Bisglycinate
**Target population:** Adults 18+ with hypermobile Ehlers-Danlos Syndrome (hEDS), Postural Orthostatic Tachycardia Syndrome (POTS), or Mast Cell Activation Syndrome (MCAS).
**Regulatory framing:** US DSHEA dietary supplement. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

## Key benefits

- Essential cofactor for MnSOD (SOD2) mitochondrial protection
- Limits upregulation of collagen-degrading enzymes (MMPs)
- Required for building glycosaminoglycans (GAGs) like Hyaluronic Acid
- Blocks calcium influx into mast cells to inhibit degranulation

## What it is

An essential trace mineral that serves as the cofactor for enzymes in connective tissue synthesis and mitochondrial protection

## Why we include it

Required for SOD2 (mitochondrial antioxidant), glycosyltransferases (GAG synthesis), and prolidase (collagen recycling)

## Plain-language summary

Manganese is an essential trace mineral that serves as the cofactor for several enzymes critical for connective tissue: prolidase (recycles proline for collagen synthesis), glycosyltransferases (collagen post-translational modification), and chondroitin sulfate-producing enzymes. It's also the cofactor for MnSOD (mitochondrial superoxide dismutase), the primary antioxidant defense inside your mitochondria. Manganese deficiency upregulates MMP-1, MMP-9, and MMP-13 - exactly the matrix-degrading enzymes elevated in hEDS - so adequate manganese is part of keeping that pathway quiet. We dose 4 mg elemental manganese as manganese bisglycinate in the AM capsule.

## Mechanism

Manganese powers SOD2, the primary antioxidant protecting mitochondria (cellular powerhouses). Deficiency has been shown to upregulate MMP-1, MMP-9, and MMP-13-the exact enzymes overactive in hEDS. It also competes with calcium at mast cell influx channels, inhibiting the release of histamine.

## Condition-specific notes

### MCAS (Mast Cell Activation Syndrome)

Blocks calcium influx needed for degranulation. Enhanced SOD2 activity reduces oxidative triggers. The bisglycinate form is clean-label.

### hEDS (hypermobile Ehlers-Danlos Syndrome)

Deficiency upregulates the exact MMPs that thin collagen in hEDS patients. Supports GAG synthesis (Chondroitin, Hyaluronic Acid).

### POTS (Postural Orthostatic Tachycardia Syndrome)

Supports mitochondrial health in ME/CFS/POTS populations where 100% of patients show measurable dysfunction.

## Why this form

**Selected form:** Manganese Bisglycinate

Chelated delivery through amino acid transporters. EFSA confirms bisglycinate offers better GI tolerance than inorganic salts.

**Form comparison:**

| Form | Notes | Selected |
|---|---|---|
| Manganese Bisglycinate | Chelated; amino acid transport; superior GI tolerance | Yes |
| Manganese Sulfate | Standard reference form; higher rates of GI upset | No |

## Dose protocol

| Step | Dosage | Notes |
|---|---|---|
| Weeks 1-2 | 1-2 mg daily | Assess tolerance |
| Week 3+ | 4 mg daily | Target maintenance (AM) |

**Timeline to effect:** SOD2 activity enhancement requires ~3 months for full cellular effect.

## Evidence summary

### Connective Tissue Protection

Deficiency creates a catabolic state by increasing collagen-degrading enzymes.

- [2] **Dong et al., 2021.** Finding: Manganese deficiency upregulates MMP-1, MMP-9, and MMP-13.. PMID: 34546491.

### Mitochondrial & Mast Cell Support

Enhances cellular protection and stabilizes mast cell membranes.

- [1] **Davis & Greger, 1992.** Finding: Sustained supplementation at 15mg/90 days meaningfully increased SOD2 activity.. PMID: 1550052.
- [3] **Hide M, Beaven MA, "Suppression of IgE-mediated mast cell activation by Mn2+".** Design: In vitro mast cell study. Finding: Mn2+ blocks calcium influx by competition, inhibiting IgE-mediated degranulation. PMID: 1869551.

### Essential Cofactor Role and Dosing Context

Manganese is the cofactor for arginase, glutamine synthetase, pyruvate carboxylase, and Mn-SOD. These metalloproteins underpin antioxidant defense (Mn-SOD), urea-cycle handling (arginase), glutamine metabolism (GS), and TCA-cycle anaplerosis (pyruvate carboxylase). Daily dietary intake is the primary determinant of status; the 2 mg supplement dose sits well below the UL (11 mg/day).

- [4] **Chen P, Bornhorst J, Aschner M, "Manganese metabolism in humans".** Design: Comprehensive metabolic review. Finding: Manganese is essential for development, digestion, reproduction, antioxidant defense, energy production, and immune response via cofactor function for arginase, GS, pyruvate carboxylase, and Mn-SOD; deficiency is rare but supplementation is appropriate at the 2 mg dose range. PMID: 29293455.
- [5] **Martins AC et al., "Manganese in the Diet: Bioaccessibility, Adequate Intake, and Neurotoxicological Effects".** Design: Authoritative dietary intake review. Finding: Reviews Mn occurrence in food, bioaccessibility, and adequate-intake levels by age; establishes safe-dose framework for supplementation up to the UL. PMID: 32298096.

## Evidence gaps

No direct trials in EDS/POTS cohorts. The 'MMP paradox' requires selenium co-supplementation (included) to be safe.

## Safety

**Side effects:** Well-tolerated at 4mg (dose is below IOM upper limit of 11mg). Neurotoxicity risk is only for chronic high-dose inhalation.

**Interactions:** No clinically relevant interactions with medications. Separate from tetracyclines by 2+ hours.

**Cautions:** Iron status affects absorption (low ferritin increases manganese uptake).

**Excipients to avoid:** Citric acid, Soy-based fillers

**Excipients that are safe:** Rice flour, HPMC capsules

## Frequently asked questions

### Why is manganese in the formulation?

Manganese is essential for several connective tissue enzymes (prolidase for proline recycling, glycosyltransferases for collagen modification) and for MnSOD, the mitochondrial antioxidant. A 2021 Dong study showed manganese deficiency upregulates MMP-1, MMP-9, and MMP-13, the same matrix-degrading enzymes elevated in hEDS, so adequate manganese keeps that degradation pathway quieter. See Addressing the Triad above for the full mechanism walk.

### Is 4 mg of manganese safe?

Yes. The Tolerable Upper Intake Level for manganese in adults is 11 mg/day, and the standard dietary intake from food is around 1-3 mg. Our 4 mg dose sits comfortably between dietary baseline and the UL - well-studied range with strong safety margin. Manganese toxicity concerns are mostly relevant to inhaled manganese (welders, mining exposure) which bypasses the liver's regulatory capacity. Oral manganese at 4 mg/day has decades of supplement use without clinical safety issues in non-cholestatic individuals.

### Does manganese trigger mast cells?

No, actually the opposite. Manganese competes with calcium at the channels that trigger mast cell degranulation, and MnSOD activity reduces the oxidative stress background that amplifies mast cell reactivity. No evidence supports manganese as a mast cell trigger at supplement doses. The specific study references are in the MCAS card above.

### Are there interactions with other minerals?

Manganese competes with iron and calcium at intestinal transporters, so very high doses of those minerals can reduce manganese absorption. At our 4 mg dose, this isn't typically a problem - most people's diet provides plenty of headroom. Take the AM capsule away from high-iron meals if you want maximum absorption, but it's not critical. Manganese has no documented direct interactions with the standard POTS, MCAS, or hEDS medication stacks. Clean trace mineral profile.

## References

[1] Davis CD, Greger JL. (1992). Changes of manganese-dependent superoxide dismutase activities and expression with sustained manganese supplementation. PMID: 1550052. https://pubmed.ncbi.nlm.nih.gov/1550052/
[2] Dong et al.. (2021). Manganese deficiency increases MMP expression. PMID: 34546491. https://pubmed.ncbi.nlm.nih.gov/34546491/
[3] Hide M, Beaven MA. (1991). Suppression of IgE-mediated mast cell activation by Mn2+. PMID: 1869551. https://pubmed.ncbi.nlm.nih.gov/1869551/
[4] Chen P, Bornhorst J, Aschner M. (2018). Manganese metabolism in humans. PMID: 29293455. https://pubmed.ncbi.nlm.nih.gov/29293455/
[5] Martins AC et al.. (2020). Manganese in the Diet: Bioaccessibility, Adequate Intake, and Neurotoxicological Effects. PMID: 32298096. https://pubmed.ncbi.nlm.nih.gov/32298096/