Caffeine is a chemical that remains in the same form no matter what it's actual source is. So yes, the caffeine in tea and the caffeine in coffee is identical, but for it's concentration (the amount of it in the drink).

The caffeine levels in white tea vary by blend. The caffeine content in white tea can be as low as 12 mg and as high as 58 mg.

Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks. Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks.

Most do not. The exceptions are when homemade mocha cookies contain actual coffee, but some caffeine is lost through the baking process.

Retail brands containing caffeine are Get Up and Go's "Smart Cookie" and the Cookie Department's "Awaken" brand.

Minors (under age 16) should not regularly consume highly-caffeinated products.

Milk chocolate has very little caffeine. Generally only dark chocolate has any appreciable amount of caffeine.

Nhs guidelines suggest a 50g bar of milk choc would have approximately 25mg. The amount of actual chocolate in a Mars bar is small so caffeine will be slight. Won't bring you anywhere near the 200mg recommended daily limit. A Mars bar will have almost no caffeine.

A mars bar is 58g total, milk chocolate makes up ~ 40%. So 23g of milk chocolate would be about 5mg of caffeine. To put that in perspective the average cup of coffee has 95mg of caffeine.