Creatine and Vitamin D: Can You Take Them Together?

Yes, you can take creatine and vitamin D together. We found no known interaction between them, and they can go in the same meal. They do different jobs, though, and no randomized trial has tested the combination (PubMed search, November 2026). Creatine helps build muscle when you also do resistance training. Vitamin D mainly matters if your blood level is low, and taking extra does little for muscle or fractures if you already have enough.

Evidence grade: B for creatine with resistance training in older adults. Grade C for vitamin D and muscle strength (small effect, mainly in people who are deficient). No direct evidence for the combination.

Key takeaways

• Creatine plus resistance training added about 1.4 kg more lean mass than training alone in adults averaging 57–70 years (22 trials).
• Vitamin D supplements gave a small boost to muscle strength, but not muscle mass or power (30 trials). The effect was larger in people with very low levels and in people over 65.
• In VITAL, a large trial in 25,871 people, 2,000 IU of vitamin D a day did not reduce fractures in adults not selected for deficiency.
• Typical amounts: creatine 3–5 g a day. Vitamin D 600 IU a day (800 IU after 70), with an upper limit of 4,000 IU unless a clinician advises more.
• Take vitamin D with a meal that has some fat. Timing does not matter much for creatine.

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Why people pair them

Both are popular for staying strong with age. Creatine increases the energy reserve in muscle, so you can do a little more work in each training session. Vitamin D helps the body absorb calcium, and muscles and nerves need it to work normally (NIH Office of Dietary Supplements). They act in different ways, so there is no reason to expect one to strengthen or block the other. That also means the combination is not proven to work better than each one alone.

What creatine does after 50

Chilibeck and colleagues pooled 22 randomized trials with 721 older adults who did resistance training. Creatine added about 1.37 kg of lean tissue compared with training alone, plus small-to-moderate strength gains (Chilibeck et al., 2017). An earlier meta-analysis found similar results for strength and the chair-stand test (Devries and Phillips, 2014). The benefit depends on the training: creatine without exercise has little evidence. For men, see creatine for men over 60. For muscle loss, see creatine for sarcopenia.

What vitamin D does, and does not do

• Muscle: in a meta-analysis of 30 randomized trials (5,615 people, mean age 61), vitamin D slightly improved overall strength. It did not change muscle mass or power. The benefit was larger in people starting below 30 nmol/L and in people 65 or older (Beaudart et al., 2014).
• Fractures: in VITAL, 2,000 IU of vitamin D3 a day for a median of 5.3 years did not lower total, non-spine or hip fractures compared with placebo. Participants were healthy midlife and older adults who were not selected for deficiency or osteoporosis (LeBoff et al., 2022).

In practice, vitamin D is worth fixing if you are low. A blood test (25-hydroxyvitamin D) tells you. NIH ODS considers 50 nmol/L (20 ng/mL) or above adequate for most people, and above 125 nmol/L (50 ng/mL) potentially too high (NIH ODS).

How to take them together

Sources: ISSN position stand on creatine (Kreider et al., 2017) and NIH ODS vitamin D fact sheet.

• Kidney test: creatine raises serum creatinine, which can make a calculated eGFR look worse even when the kidneys are fine. Tell your doctor before blood work (case report, PMID 25239988).
• Calcium: NIH ODS notes that vitamin D with thiazide diuretics could push blood calcium too high, and that high-dose vitamin D may make some statins work less well.

Choosing a product

A plain creatine monohydrate with third-party testing is enough. Combined "creatine plus vitamin D" products have no proven advantage, and separate products let you set each dose. The options below are listed for testing and value, not ranked:

• Thorne Creatine: NSF Certified for Sport, 5 g monohydrate per scoop.
• Optimum Nutrition Micronized Creatine: low cost per gram.

For forms, Creapure and dosing, see the creatine guide.

Sources

• Chilibeck PD et al. Creatine during resistance training in older adults: meta-analysis. 2017 (PMID 29138605)
• Devries MC, Phillips SM. Creatine supplementation during resistance training in older adults: meta-analysis. 2014 (PMID 24576864)
• Beaudart C et al. Vitamin D and muscle strength, mass and power: meta-analysis of RCTs. 2014 (PMID 25033068)
• LeBoff MS et al. Supplemental vitamin D and incident fractures (VITAL). N Engl J Med, 2022 (PMID 35939577)
• Kreider RB et al. ISSN position stand on creatine. 2017 (PMID 28615996)
• NIH Office of Dietary Supplements: Vitamin D fact sheet