American ginseng (Panax quinquefolius)

Tier 2 — promising · Immunity · Blood sugar · Cognition

Distinct from Asian ginseng with a different ginsenoside profile and milder stimulating effects. Clinically shown to reduce post-meal blood sugar spikes by up to 20 percent when taken 40 minutes before eating. Also reduces cold frequency and duration in older adults. The Cereboost extract improved working memory in healthy adults within hours. Generally well tolerated.

Dose: 200–400 mg/day standardised extract; 3 g before meals for blood sugar management