Merrill Goodman

For most people, NAC is the smarter place to start because it reliably raises intracellular glutathione and carries a much larger body of clinical evidence than standalone glutathione products. Direct glutathione formulations, especially sublingual or liposomal versions, deserve a closer look when synthesis is impaired or when faster repletion matters. If you take blood thinners or nitrate medications, talk with your clinician before adding either one. TL;DR: Standard oral glutathione breaks down during digestion; a trial lasting three weeks favored sublingual delivery, while micellar forms yielded 2.4 to 2.5 times greater exposure. A pilot lasting 24 weeks found GlyNAC corrected glutathione deficiency in older adults and improved oxidative stress, mitochondrial function, cognition, and strength. Published oral NAC trials commonly use 600 to 1,800 milligrams daily, while liposomal glutathione trials use 250 to 500 milligrams; IV treatment requires clinical supervision. NAC’s stron...

Fish oil is generally the better pick when your goal is higher EPA and DHA, the omega-3s tied to heart and brain health. Cod liver oil brings vitamins A and D along with its omega-3s, but usually in smaller amounts, and that vitamin A load means pregnant people and daily users need to watch their totals. Check the label for milligrams of EPA/DHA per serving, not just “fish oil” on the front, and we will walk through exactly what to look for below. TL;DR: Compare EPA and DHA amounts, add them per serving, then multiply by capsule count; a “1,000 mg fish oil” label alone doesn’t reveal your omega three dose. Maintenance often uses 250 to 500 mg of combined EPA and DHA daily, while higher doses for triglyceride management require clinician supervision. Track vitamin A from cod liver oil alongside food and other supplements, and seek clinician guidance before use during pregnancy or breastfeeding. High dose fish oil may raise bleeding risk with blood thinners s...

Ferritin measures your body’s stored iron. A low result generally means your iron stores are depleted, while a high result points to either excess iron or inflammation that needs follow-up. Context matters here: your clinician may also check transferrin saturation (TSAT) or CRP to interpret your number accurately, since ferritin alone does not always tell the whole story. TL;DR: Ferritin results can be distorted by inflammation, liver disease, and cancer, which may require additional tests like CRP and TSAT for accurate interpretation. A ferritin level below 15 or 30 µg/L indicates iron deficiency, especially when paired with TSAT below 20%, regardless of inflammation markers. Elevated ferritin over 500 µg/L often signals inflammation, liver issues, or hereditary overload, prompting further genetic or imaging assessments. Inflammation can cause ferritin to rise independently of iron stores, making TSAT and CRP essential adjunct tests during such conditions. Rechecking ...

For healthy adults, the Recommended Dietary Allowance for zinc is 11 mg a day for men and 8 mg a day for women , with a safe upper limit of 40 mg a day from all sources combined. When a cold hits, research-backed zinc lozenges delivering at least 75 mg of elemental zinc daily, started within 24 hours of your first symptom, can shorten the illness modestly. These are two different jobs with two different doses, and mixing them up is where most people go wrong. TL;DR: The safe upper limit for daily zinc intake is 40 mg for adults, and exceeding this over weeks can impair copper absorption and immune function. Zinc lozenges with at least 75 mg of elemental zinc, started within 24 hours of cold symptoms, can reduce cold duration by about one to two days. Formulation matters: zinc acetate or gluconate lozenges are most effective, while nasal sprays are linked to permanent smell loss and should be avoided. Taking zinc on an empty stomach may cause nausea and metallic tastes, so consuming loz...