You’re in a great position now—50 ng/ml is far from insufficiency and certainly high enough for you to reap the full spectrum of vitamin D whole-body health benefits.* You can also raise your 25(OH)D status by quite a lot before reaching truly toxic levels of vitamin D.* (But we’ll let the science do the talking, here.)

It was reported in a 2018 review published in Frontiers in Endocrinology that both the Institute of Medicine and the Endocrine Society have concluded serum 25(OH)D concentrations must exceed 150 ng/ml for vitamin D toxicity to be of concern. If you haven’t done the mental math already, that’s three times the recommended 25(OH)D level of 50 ng/ml.

Now that we’ve addressed any apprehension you may have about climbing above 50 ng/ml, let’s talk about next steps for maintaining sufficient vitamin D levels. After taking a high-potency D3 supplement for the past three months, what you don’t want to do is stop cold turkey after reaching 50 ng/ml. This will surely lead to yo-yo-ing between sufficient and insufficient D status, and we’re exclusively aiming for steady levels of vitamin D sufficiency. 

Some nutrition experts and clinicians recommend their patients hover around 50 ng/ml, while others encourage their patients to aim higher (we’re talking 60 to 80 ng/ml). We encourage you to find an endocrinologist, registered dietitian, or other health care practitioner well-versed in the current vitamin D research and best practices to care for you and your specific health needs.

Whether you and your trusted care provider decide you should continue taking 5,000 IU of vitamin D each day, more than 5,000 IU, or cut back to a lower dosage (e.g., 2,000 to 3,000 IU), it’s important to continue testing your 25(OH)D levels periodically to establish a supplementation routine that works for your personal biological makeup.

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