All guides
Every guide on Alinekart, newest first. Each one works from published standards and manufacturer documentation, and ends with its sources.
Imported Aluminum and Brass Cookware: FDA’s Lead Warning and What to Check
In August 2025 the FDA warned that certain imported aluminum, brass and Hindalium or Indalium alloy cookware may leach significant lead into food, and told consumers to throw it away rather than donate it.
Cookware Materials Explained: Choosing Pans by How They Move Heat
Two properties decide how a pan behaves: how fast it conducts heat sideways, and how much heat it stores. Copper conducts 25 times better than stainless steel. That single ratio explains most of the market.
Reverse Osmosis: What NSF/ANSI 58 Covers and What It Costs You
RO is the only domestic technology that removes dissolved inorganics — nitrate, arsenic, fluoride, TDS. It also produces wastewater, works slowly, and is more system than most municipal supplies need.
Pitcher, Faucet, Under-Sink or Reverse Osmosis: Choosing by Contaminant
The form factor sets a ceiling on what a filter can achieve, because contact time with the medium is what removes contaminants — and a pitcher cartridge has very little of it.
How to Choose a Water Filter: Start With Your Own Water, Not the Filter
Filters are certified for named contaminants, so the first step is finding out what is in your water. Your utility publishes it annually, free, and it makes most of the decision for you.
NSF/ANSI 42 vs 53 vs 401: Which Water Filter Certification Covers What
A filter certified to NSF/ANSI 42 is certified for taste and odor — not for lead, not for anything with a health effect. The standard number tells you which claims were actually tested.