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Our experienced healthcare professionals evaluate the underlying cause of your deficiency, discuss available options, and consider your preferences

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doi: 10.5665/sleep.4914

Durvets highest level of vitamin B12 available

To keep yourself safe from any adverse effects, take your B12 supplement in the morning or early afternoon to prevent any potential disruption to sleep

The RDA limits are set very low and many studies (see below) have shown that significantly higher levels are more beneficial
