Here is a closer look at the strongest studies behind CitrusBurn's ingredients, including where the evidence is solid and where it's still mixed.
Bitter orange and p-synephrine
A 2004 review in the Journal of the Society for Experimental Biology and Medicine examined synephrine's lipolytic activity and cardiovascular safety profile, concluding that effects on human fat cells occur mainly at higher doses and that cardiovascular caution is warranted given synephrine's structural similarity to epinephrine.
Apple cider vinegar and appetite
A 2018 randomized clinical trial in the Journal of Functional Foods (Khezri et al.) found that 30 mL of apple cider vinegar per day, combined with a calorie-restricted diet, significantly reduced body weight, BMI, hip circumference, and appetite scores compared to diet alone over 12 weeks.
Capsaicinoids and resting metabolic rate
A systematic review and meta-analysis of 13 placebo-controlled trials found capsaicinoid supplementation significantly raised resting metabolic rate by about 34 kcal per day and improved fat oxidation, though the researchers described the clinical impact as moderate rather than dramatic.
Ginger and blood sugar
A 2016 systematic review and meta-analysis in a peer-reviewed nutrition journal found ginger supplementation significantly reduced fasting blood glucose and HbA1c; however, a more recent 2024 meta-analysis found no significant effect on fasting blood sugar, underscoring that the evidence for this specific benefit remains mixed.
Green tea catechins and body weight
A widely cited 2012 Cochrane systematic review of 14 randomized trials found green tea preparations produced a small but statistically significant weight reduction of roughly 0.95 kg compared to placebo, with larger effects generally seen in trials combining catechins with caffeine.
Berberine and glycemic control
A 2021 systematic review and meta-analysis of 46 randomized controlled trials found berberine significantly reduced HbA1c, fasting plasma glucose, and insulin resistance markers in people with type 2 diabetes, with effect sizes the authors described as clinically meaningful.
Korean red ginseng and fatigue
An 8-week randomized, double-blind, placebo-controlled trial published in the Journal of Ginseng Research found Korean red ginseng supplementation significantly reduced subjective physical fatigue and post-exercise blood lactate compared to placebo, with no adverse safety findings reported.