Why do some people have slow metabolisms and others with fast ones?

Question

Also why do people with the fast metabolisms never seem to gain any weight?

Answer 1

it usually depends on a combination of your body chemistry and physical activity. the body chemistry is a combination of your hormone output, insulin output, metabolism, food intake, water intake, and just overall health. those who are more physically active tend to burn everything at a higher rate because they have more muscle mass than someone who is less physically active.

Answer 2

Fast metabolism burns more calories, so they need to eat more food to maintain the same weight. While that seems wonderful in today's overfed society, for a lot of human history, there have been famines, and guess which people died off first ...

I believe that actually a slower metabolism combined with an appropriate diet is the combination that is most likely to result in long life. Slow metabolism but overweight would not be good.

Answer 3

Why are some people tall and some short? Why are some prone to certain health issues and some not? It's just how we are designed...some of it is hereditary and some is how we treat ourselves.

Poor dieting practices and some medications, can slow a person's metabolism...as does age...

People with fast metabolisms don't gain weight easily because their body burns more caloires all the time, even at rest, than someone with a slow metabolism...that's why people work hard to boost their metabolism...exercise can do that...having more muscle in our body can do that too...

Answer 4

Fast metabolism means your body runs at a higher rate so it burns fuel (food) faster and better...less fat stored. people with slower metabolisms have the opposite happen. Often it has to do with your thyroid and other endocrine glands, If someone is to thin or to overweight they may need to see a doctor to have tests done. Their endocrine glands may be out of wack.

Answer 5

the reason is that due to genetics(genes) which decides how your body will be(skinny,regular,voluptuous). people with fast metabolisms never gain weight because sometime after they ate fatty foods their metabolism burns the fat they digested.

Answer 6

Is just the way things are. and they don't gain weight because they burn calories faster than the average person

Answer 7

genetics

Answer 8

i believe its genetics and how your thyroids work.