THAT toxic feeling you get after a greasy burger and chips or a few too many bourbons isn't imaginary.
You're filling your body with food that makes your body acidic.
Nutritionist Jennifer Jeffries fronted a Business Excellence breakfast at Tweed Heads Bowls Club this week with tips to bring your body back into the "alkaline corridor."
She said the Western world had created grocery stores full of foods that had little nutritional benefits and clogged our bodies with toxins.
She said low-fat or diet options are often big culprits.
"Back in the 1950s a bowl of spinach gave you all the nutrients you needed for one day, now you'd need 42 bowls," Ms Jeffries said.
"We have leeched all the nutrients out of the soil.
"So even if you are eating plenty of vegies, you have to be eating organic or you're not getting the benefits."
She said white pasta, white rice and white bread were terrible for your bowels whereas whole grains moved through the system easier.
It's important to get plenty of fats too - omega 3, 6, and 9 and a lot less saturated fats.
Her number one tip is a super shake first thing when you wake up full of things like flaxseeds, coconut oil, and lemon to get your body working first thing.
And for the brave, take a garlic clove before you go to bed, like you would a tablet.
"It's great at bringing your body back into the alkaline corridor, it works while you sleep moving around the body finding all the nasties," she said.
Apparently if you take it whole you don't smell the next day.
She said business owners feeling tired, miserable or cranky needed to have a close look at their diet to improve productivity.
"I burnt out when I was 27, so I started to study nutrition and now I'm 51 and I'm fitter than ever," she said.
For more information visit her website.