Are Magnesium and B6 Better Together Than Alone?

The information in this article and throughout Trio Nutrition’s blog is for informational purposes only and should not replace professional medical advice. For questions about our products or orders, please contact Trio Nutrition. Written, read and reviewed by the Trio Nutrition team.

Magnesium and B6 are two nutrients that show up together on many supplement labels. The pairing raises a fair question: does vitamin B6 make magnesium work better, or is the combination simply convenient? The NIH Office of Dietary Supplements (ODS) describes magnesium as a cofactor in more than 300 enzyme systems. Adult Recommended Dietary Allowances (RDAs) for magnesium are 310 to 420 mg a day. The adult RDA for vitamin B6 is 1.3 mg a day for ages 19 to 50 (NIH ODS, 2026; 2023). Below: each nutrient’s role, the trial evidence, label reading and who may benefit most.

What do magnesium and vitamin B6 each do in the body?

Magnesium and vitamin B6 support many of the same everyday functions, but by different routes. The NIH ODS fact sheet (updated January 6, 2026) lists magnesium as a cofactor in more than 300 enzyme systems. These systems regulate reactions including protein synthesis, muscle and nerve function, and energy production. Bones hold 50% to 60% of the body’s magnesium, linking magnesium to calcium absorption and skeletal health.*

Vitamin B6 is a water-soluble vitamin. The NIH ODS Vitamin B6 fact sheet names two active coenzyme forms: pyridoxal 5’-phosphate (PLP) and pyridoxamine 5’-phosphate. These forms take part in more than 100 enzyme reactions, mostly concerned with protein metabolism. The body does not hold large stores of vitamin B6, so steady intake from food matters.*

Picture the body as a restaurant kitchen. Magnesium staffs more than 300 stations and vitamin B6 more than 100 different ones. Both serve many of the same dishes, yet neither can cover the other’s stations. Doubling one worker does not replace the missing one.*

How much magnesium and vitamin B6 do adults need?

The table summarizes NIH ODS reference values and food sources.

Source: NIH Office of Dietary Supplements Magnesium (2026) and Vitamin B6 (2023) Health Professional Fact Sheets. Structure/function information only; not intended to diagnose, treat, cure, or prevent any disease.

The NIH ODS notes that many people in the United States consume less magnesium than recommended. Men age 71 and older and adolescents are at the highest risk of low intakes. Symptomatic magnesium deficiency is uncommon in healthy people. ODS also reports that forms which dissolve well in liquid tend to be absorbed better than magnesium oxide. The guide to high absorption magnesium compares the forms.

Does vitamin B6 help magnesium work better?

The evidence is limited and mixed. The largest randomized trial of the pair was published in PLOS One on December 18, 2018. It enrolled 264 healthy adults with low blood magnesium and elevated stress scores. For eight weeks, one group took 300 mg of magnesium plus 30 mg of vitamin B6 a day. The other group took 300 mg of magnesium alone.

• Main result: stress scores fell by 44.9% with magnesium plus B6 and by 42.4% with magnesium alone. There was no statistical difference between the groups. Adding vitamin B6 was not superior overall.
• Subgroup result: 162 adults had severe or extremely severe stress scores. In this subgroup, the combination produced a 24% greater improvement than magnesium alone at week 8.
• Context: the study was funded by Sanofi, the maker of the combination product tested. It used 30 mg of vitamin B6 a day, roughly 23 times the 1.3 mg adult RDA.

The paper’s proposed mechanism is that vitamin B6 helps cells take up magnesium. The idea rests on small studies at doses above the 100 mg upper limit. The data support magnesium and B6 as a reasonable pairing for nutrient coverage, not as a proven absorption booster. For everyday calm, see magnesium for stress.*

Magnesium and B6 vs magnesium alone: which fits a routine?

Based on the 2018 trial, most adults should not expect more from magnesium and B6 than from magnesium alone. The practical difference is coverage and convenience. One label replaces two, with a B6 amount near the RDA rather than a megadose. Diets rich in fish, potatoes and fruit may already supply enough vitamin B6. For those diets, a plain magnesium glycinate product is a reasonable choice.*

Who may benefit most from magnesium and B6?

Groups that may benefit from magnesium and B6 include:

• Adults whose diets run low in whole foods such as greens, legumes, nuts, fish and potatoes.
• Adults over 50. The vitamin B6 RDA rises from 1.3 mg to 1.7 mg for men and 1.5 mg for women at 51. NIH ODS also identifies men 71 and older among those most likely to have low magnesium intakes.
• Active adults. Magnesium supports normal muscle function; see magnesium for muscle soreness and muscle recovery.*
• Adults building an evening routine with magnesium for sleep.*

How to read a magnesium and B6 label

Check three lines on the label. First, elemental magnesium in mg with its % Daily Value. Second, the magnesium form; magnesium bisglycinate and magnesium glycinate are the same form. Third, the vitamin B6 amount, well under the 100 mg upper limit. To compare formulas, read Magximum vs Magnesium Complex or browse magnesium glycinate supplements.

The easy pick: Trio Nutrition Magnesium Complex

Magnesium Glycinate Complex pairs magnesium and B6. Per its Supplement Facts panel:

• 2 capsules per serving, 90 servings, 180 capsules (90-day supply)
• Magnesium 420 mg (100% DV) from magnesium glycinate + magnesium oxide
• Vitamin B6 (as pyridoxal-5-phosphate) 2 mg (118% DV)
• Made without milk, eggs, peanuts, tree nuts, wheat, soy, fish, shellfish and sesame
• Manufactured in the USA in an FDA-registered facility · GMP-certified · lab tested
• 60-day full-refund guarantee — no return required^*

Why customers choose Trio Nutrition

• Manufactured in the USA in an FDA-registered facility, GMP-certified and lab tested
• Vegetarian capsules made without the nine major food allergens
• 60-day full-refund guarantee — no return required*

The bottom line on magnesium and B6

Magnesium and B6 are essential nutrients with distinct jobs. The largest randomized trial (2018, 264 adults) found the pair performed about the same as magnesium alone. The added effect appeared only in people with severe stress scores and at a high B6 dose. Choose magnesium and B6 together for nutrient coverage and convenience, and start with food. Keep vitamin B6 well below the 100 mg upper limit, and check with a clinician about medication interactions.*

Frequently asked questions

Does vitamin B6 help magnesium absorption?

Vitamin B6 has not been proven to raise magnesium absorption in healthy adults at normal intakes. A 2018 PLOS One trial describes cellular uptake of magnesium as a proposed mechanism. The proposed mechanism rests partly on a study of 9 women who took 200 mg of vitamin B6 a day. The 200 mg dose is double the NIH adult upper limit of 100 mg. The finding therefore cannot be applied to everyday supplement amounts.*

Can magnesium and vitamin B6 be taken at the same time?

Magnesium and vitamin B6 can be taken at the same time. The largest trial of the pair gave 300 mg magnesium and 30 mg vitamin B6 in one daily regimen. In that 2018 trial of 264 adults, 12.1% of the magnesium plus B6 group reported possibly related side effects. The rate in the magnesium-only group was 17.4%. Magnesium can interact with oral bisphosphonates, tetracyclines and quinolone antibiotics, according to the NIH Office of Dietary Supplements. Medication users should ask a pharmacist about spacing.*

Does magnesium glycinate contain vitamin B6?

Magnesium glycinate does not contain vitamin B6 on its own. Magnesium glycinate is simply magnesium bound to the amino acid glycine. Vitamin B6 appears only when a manufacturer adds a separate ingredient such as pyridoxine hydrochloride or pyridoxal-5-phosphate. The Supplement Facts panel is the reliable way to confirm a combination formula. A combination formula shows a vitamin B6 line in mg and % Daily Value.*

Which foods provide both magnesium and vitamin B6?

Legumes, nuts, seeds, whole grains and leafy greens supply magnesium, according to NIH Office of Dietary Supplements fact sheets. Fish, beef liver, potatoes and non-citrus fruit supply vitamin B6. Fish or beans with potatoes and greens covers both nutrients in one meal. The NIH reports that about 30% to 40% of the magnesium in food is absorbed. Partial absorption is one reason varied whole-food meals matter.*

How much vitamin B6 do adults need each day?

Adults ages 19 to 50 need 1.3 mg of vitamin B6 daily, according to the NIH Office of Dietary Supplements. At age 51, the RDA rises to 1.7 mg for men and 1.5 mg for women. The tolerable upper intake level for adults is 100 mg a day. Long-term vitamin B6 intake of 1 to 6 g a day has been linked to severe sensory nerve problems. The reported cases involved 12 to 40 months of use, so higher vitamin B6 amounts are not better.*

*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.

All Trio Nutrition products are Manufactured in the USA and lab tested in FDA-registered facilities.

Important Notice: Trio Nutrition products are dietary supplements, not medicines, and are intended to support normal bodily structure and function. Magnesium and vitamin B6 supplements are not intended to diagnose, treat, cure, or prevent any disease.

Disclaimer: Always consult your physician or a qualified healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition.

Sources & Further Reading

• National Institutes of Health, Office of Dietary Supplements. “Magnesium — Health Professional Fact Sheet.” Updated January 6, 2026.
• National Institutes of Health, Office of Dietary Supplements. “Vitamin B6 — Health Professional Fact Sheet.” Updated June 16, 2023.
• Pouteau E, et al. “Superiority of magnesium and vitamin B6 over magnesium alone on severe stress in healthy adults with low magnesemia: A randomized, single-blind clinical trial.” PLOS One, December 18, 2018.

— The Trio Nutrition Team