Tools

Plain curcumin has ~1% oral bioavailability — most of what you take is excreted. Branded formulations (Meriva, BCM-95, Theracurmin, Longvida, NovaSOL) claim 5-30× better absorption. Calculator shows which claims hold up vs which are marketing. Math, not medical advice. Why turmeric ≠ curcumin: dried turmeric root is only 2-5% curcuminoids. A 1,000 mg “turmeric extract” […]

Calculate your creatine dose by body weight for loading or daily maintenance. Most adults can skip loading and just take 3-5 g/day — saturation just takes 3-4 weeks instead of 5-7 days. Math from ISSN guidelines, not medical advice. Creatine monohydrate is the gold standard. 700+ studies, decades of safety data, ~$0.10/serving. The “advanced” forms

Choose between CoQ10 (ubiquinone) and Ubiquinol by age, statin use, and heart goal. After ~40, the body’s ability to convert ubiquinone to active ubiquinol declines — that’s where Ubiquinol justifies its 3× price. Under 40, ubiquinone works fine. Math, not medical advice. The 40+ rule: ubiquinone (cheaper CoQ10) converts to ubiquinol in the body, but

📚 Researched & cited by UV Editorial Team Independently reviewed · Last updated: May 29, 2026 · Our research methodology → Jump to section ▼ What we DO What we DON’T Where this leaves us Editorial independence Updates and corrections Contact Editorial standards The standards behind every supplement review on this site: what we verify,

DTC Greens Powder Cost & Ingredient Comparator | UsefulVitamins DTC Greens Powder Cost & Ingredient Comparator Not all greens powders are created equal — or priced the same. This tool filters 10 products (4 DTC brands, 6 Amazon picks) by your monthly budget, dietary needs, and health goal, then surfaces the top 3 by value

📚 Researched & cited by UV Editorial Team Independently reviewed · Last updated: May 29, 2026 · Our research methodology → Calculate the latest time you should drink your last caffeinated beverage based on your target bedtime, your caffeine sensitivity, and the dose. Built on a pharmacokinetic decay model with Drake 2013 sleep-disruption evidence as

📚 Researched & cited by UV Editorial Team Independently reviewed · Last updated: May 30, 2026 · Our research methodology → Estimate the daily vitamin D3 dose needed to raise your serum 25(OH)D from a known baseline to a target level. Based on Heaney 2003 dose-response (~100 IU/day per 1 ng/mL increase, weight-adjusted). Math, not

Convert vitamin D between micrograms (mcg) and International Units (IU). Works for both D3 (cholecalciferol) and D2 (ergocalciferol) — they share the same conversion factor. Math, not medical advice. 1 mcg vitamin D = 40 IU. The conversion factor is fixed by FDA / IOM definition and applies equally to D3 (cholecalciferol) and D2 (ergocalciferol).

Compare 2 or 3 peptides head-to-head: FDA status, primary indication, typical dose, evidence level, monthly cost, side effects, and the deep-dive article on each one. Comparison rows are based on FDA prescribing information, manufacturer-published prices, and the published RCT literature as of 2026-04-27. Not medical advice — verify with your prescriber before starting any peptide.