At what age did your metabolism start to slow down

It really doesn’t. You probably eat a shitty diet.

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At what age did your metabolism start to slow down

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This doesn’t happen.

you mean at what age do you slow down?

Yes, I'm 30 and can eat like a horse

Around 30, but then another noticible hit at 40.

Now I have to exercise, cardio almost everyday and eat well to keep from gaining weight. It sucks.

About 35ish.

28

Around 30. I have never had big fluctuations in my weight, but after 30 I can definitely see a difference this time a year when I eat and drink whatever I please. It goes straight to my gut.

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Around 30, but then another noticible hit at 40.

Now I have to exercise, cardio almost everyday and eat well to keep from gaining weight. It sucks.

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This.

Metabolism certainly slows down in a linear fashion with age. However, the deterioration can be lessened with healthy habits such as diet and exercise.

This is what most people mean when they talk about longevity. It isn’t just about living for as long as possible; it’s about maintaining a healthy body into old age.

No 30 or 40 year old man should be lamenting their slow metabolism, low energy, and weight gain. If that’s really a problem, it’s more indicative of spending years with unhealthy habits that have led to an unhealthy body.