Merrill Goodman

A normal homocysteine level runs roughly 5 to 15 µmol/L , with moderate, intermediate, and severe elevation climbing from there. A high result is a genuine marker of vascular risk, but lowering the number is not a proven way to prevent a heart attack or stroke on its own. Your best move is checking B12, folate, and B6 status and reviewing the result with a clinician who can hunt for the actual cause. TL;DR: Elevated homocysteine levels primarily result from deficiencies in B12, folate, or B6, with kidney disease and medications also causing increases. Most trials show lowering homocysteine with B vitamins does not significantly reduce cardiovascular events, making it a risk marker rather than a cause. Homocystinuria causes severe elevation and requires specialist treatment, while common variants like MTHFR only modestly impact levels. Accurate diagnosis depends on assessing B12, folate, MMA, kidney, and thyroid function alongside the homocysteine test; supplement based on confirme...

Every vegan needs a reliable source of vitamin B12, and there are only two paths that deliver it: a consistent fortified-food pattern or a simple supplement routine, taken daily or weekly. The best-researched form is cyanocobalamin, and a common approach is a daily moderate-dose tablet or a higher-dose weekly supplement. If you have symptoms, malabsorption risk, or haven’t checked your levels in years, get tested before you assume your current habits are enough. TL;DR: Vegans should rely on consistent fortified foods or a daily or weekly B12 supplement to maintain sufficient levels and prevent deficiency-related health issues. Reliable fortified sources include plant milks, breakfast cereals, nutritional yeast, and fortified tofu, but label reading is essential due to variability in B12 content. Cyanocobalamin is the recommended supplement form, with dosing options of approximately 2.4 mcg daily or 2,000 mcg weekly, depending on absorption capacity and individual needs. High-risk ...

By Derrick Smith Published September 1, 2026 Apple cider vinegar is often discussed as a tool for metabolic health. However, direct clinical evidence in people with polycystic ovary syndrome (PCOS) is limited. One randomized controlled trial tested apple cider vinegar capsules in women with PCOS who were already taking metformin. The results were encouraging, but they apply to a specific group. They do not show that apple cider vinegar can replace standard treatment. Why Metabolic Health Matters in PCOS PCOS is a hormone-related disorder that affects women of reproductive age. It often occurs with insulin resistance, which means the body does not respond normally to insulin. PCOS may also occur with metabolic syndrome, a group of related metabolic risk factors. For more background, readers can explore how metabolic syndrome is understood and the basics of insulin resistance . The available trial focused on women who had PCOS, metabolic syndrome, and insulin resistance. This is importa...

The evidence points to a target range of roughly 30 to 50 ng/mL (75 to 125 nmol/L) of serum 25(OH)D for most adults, with anything below 20 ng/mL (50 nmol/L) considered inadequate for bone health. Don’t chase the highest number you can find. Levels above 50 ng/mL bring no proven extra benefit, and pushing past 125 nmol/L without your clinician watching your labs raises real safety concerns. TL;DR: Most adults should aim for serum vitamin D levels between 20 and 50 ng/mL, with levels below 12 ng/mL indicating deficiency that needs correction. Vitamin D measurements vary depending on assay methods and seasonality, so consistent testing and interpretation based on verified thresholds are essential. Testing is most recommended for older adults, those with limited sun exposure, fat absorption issues, obesity, darker skin, or chronic kidney conditions. Supplementation with vitamin D3 is more effective and sustainable than D2, especially at doses around 1,000 to 2,000 IU daily, tailored ...