A human study found that 72% of healthy adults with low vitamin D and feelings of fatigue reported improvement with vitamin D supplementation.

High cortisol levels increase the risk of death from cardiovascular disease five-fold. Clinical evidence shows that several plant extracts reduce elevated cortisol.

Excess uric acid is associated with gout, kidney stones, and kidney disorders. In clinical trials, a plant extract reduced uric acid levels by 28.4% and improved markers of kidney function.

Resveratrol improves biomarkers of human health, including bone and heart, indicating that it may also promote healthy aging.

With age, arteries lose functional elasticity, which contributes to cardiovascular disorders.

Silymarin improves damage from nonalcoholic fatty liver disease; taurine reduces metabolic syndrome risk, and more.

Cinnamon was shown in clinical trials to help manage blood sugar and weight, particularly in type II diabetics and prediabetics.

Chamomile tea contains 50 flavonoids and shows various benefits including peaceful sleep and a modest reduction of blood sugar.