Effects of vitamin D on mood and sleep in the healthy population: Interpretations from the serotonergic pathway
What has been reported in the available human pilot research is that no significant adverse effects were observed - which is a meaningful data point for safety consideration, even if it does not establish efficacy by clinical standards
However, serious side effects such as allergic reactions or heart failure in individuals with heart disease are rare but possible
For best results, follow with a moisturizer and use consistently for 4-8 weeks to achieve softer, smoother, and more radiant skin
A beginner's guide to how it works, benefits, dosage, and safety
Directions for Use: Dosage and Administration: Use as directed by a healthcare provider