Inositol + Magnesium — Supplement Stacking Guide

References

1. Berberine activates AMPK in adipocytes and myotubes, increasing GLUT4 translocation, reducing lipid accumulation, and improving glucose tolerance without altering food intake. PubMed
2. The physiological 40:1 myo-inositol to D-chiro-inositol ratio restored ovulation in PCOS patients more effectively than other ratios. PubMed
3. Myo-inositol supplementation decreased serum testosterone and triglycerides, and 16/23 treated women ovulated vs 4/19 on placebo in a double-blind PCOS trial. PubMed
4. D-chiro-inositol glycans function as insulin second messengers, activating protein phosphatases of the MPP family; their metabolism is associated with insulin sensitivity. PubMed
5. Myo-inositol (3g/day) significantly reduced LH, LH/FSH ratio, and androstenedione while improving insulin response in normal-weight PCOS patients. PubMed
6. A systematic review and meta-analysis of 30 trials (n=2230) informing the 2023 international PCOS guideline concluded that the evidence supporting inositol in the management of PCOS is limited and inconclusive. PubMed
7. Human PK study in healthy volunteers measuring myo-inositol plasma Cmax/Tmax/AUC after oral dosing (form-specific bioavailability). PubMed DOI
8. RCT (n=50); myo-inositol 4 g/day improved insulin sensitivity and menstrual regularity comparably to metformin in PCOS. PubMed DOI
9. RCT (n=53); myo-inositol added to metformin improved menstrual regularity and quality of life vs metformin alone in PCOS. PubMed DOI
10. 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
11. 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
12. 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
13. 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
14. 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
15. 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
16. 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
17. 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
18. 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
19. 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
20. 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
21. 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
22. Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE(TM) Microcapsules) Versus Other Magnesium Sources. PubMed
23. 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
24. 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
25. 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
26. 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
27. 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