Daily How Much

The amount of calcium carbonate in a Tums tablet varies by product: Regular Strength contains 500 mg, Extra Strength 750 mg, and Ultra Strength 1000 mg per chew

Decaf coffee still contains trace amounts of caffeine — roughly 2 to 7 mg per 8-ounce cup, compared to 70–140 mg in regular coffee.

Your body absorbs calcium most efficiently when you take 500 mg or less at one time. Taking more than that lowers the overall absorption rate.

For most adults with osteoporosis, total calcium intake of about 1,200 mg per day and 800 to 1,000 IU of vitamin D is the typical target.

An 8-ounce cup of brewed coffee averages about 95 mg of caffeine, but total caffeine content can range from as low as 30 mg in instant coffee.

Adults 19–50 typically need 1,000 mg of calcium and 600 IU of vitamin D daily, with requirements rising after age 50 for women and after 70.

Daily calcium needs vary: most adults 19–50 require 1,000 mg, women over 50 and men over 70 need 1,200 mg. The NHS recommends 700 mg for adults 19–64.

Even a 100 mg dose of caffeine can disrupt sleep if consumed within six hours of bedtime, though individual sensitivity varies widely.

Caffeine affects people differently, but research shows consuming as little as 100 mg within 6 hours of bedtime can disrupt sleep for most people.

A 12-ounce can of Prime Energy packs 200 milligrams of caffeine, roughly the same as six cans of Coca-Cola or about two and a half cans of Red Bull.