CBD Shows Therapeutic Benefits Starting at 300 mg, With Strongest Evidence for Anxiety and Addiction

Therapeutic benefits became clearly evident at doses of 300 mg or higher. At 300-400 mg, there is evidence for reduced anxiety and anti-addiction effects. More marginal benefits were found for insomnia, neurological disorders, and chronic pain. Increasing doses from 60 to 400 mg/day was not associated with more frequent adverse effects. Low-dose CBD products widely available as nutraceuticals lack strong evidence of efficacy.

Review of interventional studies measuring clinical efficacy and/or safety of oral CBD at doses up to 400 mg/day in adults. Excluded studies with THC content above 2.0%. Covered multiple health conditions including anxiety, addiction, sleep, pain, and neurological disorders.

Millions of people buy low-dose CBD products hoping for health benefits. This review suggests that most over-the-counter CBD products at typical doses (10-50 mg) may be below the therapeutic threshold, while higher doses show real promise for specific conditions.

The gap between what is available over the counter (typically 10-50 mg CBD) and what appears therapeutically effective (300+ mg) raises consumer protection questions. Many people may be spending money on doses too low to produce the benefits they seek.

Narrative review rather than systematic review. Many included studies had small sample sizes. CBD products varied in formulation and bioavailability across studies. Long-term safety data at higher doses remains limited.