Coenzyme Q10 + Magnesium — Supplement Stacking Guide

References

1. A 2025 review of human and animal studies on coenzyme Q10 (CoQ10) and cognition found mixed results -- of 8 human clinical trials reviewed, 4 showed a beneficial effect on cognition while others found none -- and noted that differing CoQ10 formulation bioavailability may partly explain the disparity. PubMed
2. A 2014 review found that newer coenzyme Q10 (CoQ10) formulations have been developed to increase CoQ10 absorption and tissue distribution compared with earlier formulations, and that oral CoQ10 supplementation does not cause serious adverse effects in humans. PubMed
3. A 2014 review found that coenzyme Q10 (CoQ10) formulation advances have improved CoQ10 absorption and tissue distribution, and reported that oral CoQ10 supplementation is not associated with serious adverse effects in humans. PubMed
4. A 2006 review of coenzyme Q10 (CoQ10) pharmacokinetics found that absorption of dietary CoQ10 is slow and limited due to its hydrophobicity and molecular size, and that solubilized supplement formulations show enhanced bioavailability compared with standard formulations. PubMed
5. A 1994 human study (n=21) found that daily oral coenzyme Q10 supplementation (30 mg three times daily) for up to 9 months roughly doubled average blood CoQ10 concentration, which returned to baseline levels after a 3-month withdrawal period. PubMed
6. Magnesium oxide showed relatively poor bioavailability (fractional absorption ~4%) in normal volunteers, while magnesium chloride, lactate, and aspartate showed significantly higher and equivalent absorption. PubMed
7. Increasing brain magnesium with magnesium-L-threonate enhanced learning, working memory, and short- and long-term memory in rats, accompanied by increased hippocampal synaptic density and enhanced synaptic plasticity. PubMed
8. In a double-blind, placebo-controlled study of 109 healthy Chinese adults, a magnesium L-threonate (Magtein PS) based formula at 2 g/day for 30 days significantly improved memory and overall memory quotient scores versus placebo, with greater improvement in older participants. PubMed
9. In sleep-restricted healthy subjects, 3 g of glycine taken before bedtime reduced subjective daytime sleepiness and fatigue, supporting glycine's independent sleep-related effects (relevant to magnesium glycinate's glycine co-molecule). PubMed
10. This review establishes magnesium as an essential intracellular cation involved in over 600 enzymatic reactions including energy metabolism and protein synthesis, with important physiological roles in the brain, heart, and skeletal systems. PubMed
11. A randomized, double-blind, placebo-controlled trial evaluated MMFS-01 (magnesium L-threonate) in older adults (age 50-70) with cognitive impairment for its ability to reverse cognitive impairment and improve sleep. PubMed
12. This review of the evidence concludes that the propagation of transdermal (topical) magnesium absorption is scientifically unsupported, in contrast to the well-documented effectiveness of oral magnesium supplementation. PubMed
13. An ex-vivo and double-blind crossover study in healthy subjects compared magnesium bioavailability of Sucrosomial® magnesium against magnesium citrate, oxide, and bisglycinate preparations. PubMed
14. This hypothesis paper argues that magnesium and taurine exert complementary actions to lower intracellular free calcium, providing a mechanistic rationale for magnesium taurate's proposed vascular-protective effects. PubMed
15. In a randomized, double-blind, placebo-controlled trial, adults with poor sleep who took magnesium (as bisglycinate) showed a modestly greater improvement in sleep quality than those taking a placebo, an effect that appeared greater in people with lower dietary magnesium intake. PubMed
16. A 2026 randomized, double-blind, placebo-controlled trial found that six weeks of magnesium L-threonate supplementation improved overall cognitive performance and reaction time in adults with self-reported sleep dissatisfaction, compared to placebo. PubMed
17. A 2024 randomized, double-blind, placebo-controlled trial found that adults with self-reported sleep problems who took magnesium L-threonate showed improved deep and REM sleep measures, along with better daytime mood, energy, and alertness, compared to placebo. PubMed
18. Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE(TM) Microcapsules) Versus Other Magnesium Sources. PubMed
19. A meta-analysis of small trials found older adults taking magnesium fell asleep roughly 17 minutes faster than those on placebo, though the authors rated the evidence as low quality and called for better-designed studies. PubMed
20. In adults with low magnesium levels and high stress, oral magnesium was associated with a substantial reduction in perceived stress over eight weeks, though the trial had no placebo group. PubMed
21. A 2003 randomized, double-blind, placebo-controlled parallel trial in 46 healthy individuals (300 mg elemental magnesium daily for 60 days) found that magnesium citrate and a magnesium amino-acid chelate, analysed together, showed greater absorption than magnesium oxide by 24-hour urinary magnesium; magnesium citrate alone produced the highest serum magnesium, and magnesium oxide did not differ from placebo. PubMed
22. A 1994 randomized crossover trial in patients with ileal resection (n=12) -- a population at elevated risk for magnesium malabsorption -- found no significant overall difference in magnesium absorption between magnesium diglycinate (chelate) and magnesium oxide, but found diglycinate was significantly better absorbed in the subset of patients with the most severe absorption impairment. PubMed
23. A 1990 controlled study found that magnesium citrate was substantially more soluble than magnesium oxide across a range of simulated gastric-acid conditions, and that magnesium absorption (measured by urinary magnesium rise after an oral dose) was significantly higher with magnesium citrate than with magnesium oxide. PubMed