Most adults use 900–1,500 mg of berberine per day, split into 2–3 doses with meals; avoid in pregnancy and check medicines for interactions.

For ashwagandha dosing, 250–500 mg extract daily is common; many trials use 300 mg twice daily for stress, short term (≤3 months).

Yes, short-term ashwagandha use is generally safe at 120–600 mg of standardized extract daily, with root powder often 3–6 g.

One compact fluorescent bulb typically contains about 3–5 mg of mercury, sealed in the glass and varying by brand and year.

Zero—standard incandescent lamps contain no mercury; CFLs and other fluorescents do, in small milligram amounts.

A standard fluorescent tube holds about 3–15 mg of mercury; newer low-mercury T8/T5 lamps average near 1–3 mg while older T12 lamps run higher.

One typical 5-oz can of white (albacore) tuna contains ~30–40 micrograms of mercury based on FDA averages.

One 6-oz can of salmon averages about 2–3 µg of mercury, based on FDA’s 0.014 ppm data for canned salmon.

One 4-oz (113 g) portion of albacore tuna averages about 40 micrograms of mercury based on FDA data.

One 5-oz can of light tuna has about 14 µg of mercury; a same-size albacore can holds around 40 µg.