Will antibiotics stall my weight loss?
November 2, 2010 6:00 PM   Subscribe

I'm currently on a low carbohydrate weight loss diet, I am in a mild state of ketosis. I have been losing weight at a moderate pace and doing well. I just started taking antibiotics (500 mg of amoxicillin 3 times daily for one week) in preparation for a root canal I'm having next tuesday. Multiple sources on the internet are telling me that taking antibiotics can stall weight loss. Is this true? I really don't understand how this would work. I really hope it's not!
posted by skjønn to Health & Fitness (4 answers total) 1 user marked this as a favorite
 
What did your doctor say?
posted by andoatnp at 6:16 PM on November 2, 2010


Antibiotics -can- stall weight loss, but it's not a sure thing. It varies depending on your body chemistry. I have taken antibiotics while eating low carb and haven't noticed any difference. My mother stalled. Basically, for some people, antibiotics upset their blood sugar levels, which knocks them out of ketosis and thus out of a weight loss state.

I've known people who stall when they take Tylenol, some when they eat dairy, some when they eat sugar alcohols.

It's more important to stall/stop any sort of infections right now rather than concentrate on losing weight... if you're anything like me, you're not gonna feel like eating after your root canal, so it all evens out!
posted by aristan at 6:35 PM on November 2, 2010


One week isn't going to make any difference over the long haul. I know it feels hard to give up momentum, but it really isn't significant, and it's much more important for you to take the antibx as prescribed.

That said, I have known people who did the "fat fast" thing while they were taking antibx just to offset the potential rise in blood sugar. I do not recommend this or any other kind of dieting, but it is a hack I have heard of from low-carb dieters.
posted by Sidhedevil at 7:19 PM on November 2, 2010


Like andoatnp said, IANYD - this is a completely reasonable thing to call you PCP's office and ask. Your doctor may not be available when you call, but let the receptionist know that the doctor can call you back and/or leave a message.
posted by maryr at 10:09 PM on November 2, 2010


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