Coffee and caffeine after a gastric sleeve

For many people, the morning coffee is a ritual, not just a drink. So a common question before surgery is whether you can still have coffee after a gastric sleeve. The answer depends on where you are in your recovery and on what your care team advises. Here is what the guidelines say, and why.

Why caffeine is paused after surgery

Right after surgery, your new stomach is healing, and your main jobs are to sip enough fluid and get your protein in. Canadian guidelines for care after bariatric surgery advise avoiding caffeinated drinks, because caffeine can increase the risk of ulcers. The 2019 American guidelines summarize advice from several expert groups: the first clear fluids after surgery are free of caffeine, carbonation and alcohol, and caffeine is on the list of things to avoid or delay.

Caffeine can also have side effects. Health Canada lists trouble sleeping, irritability, headaches and nervousness. And a large coffee can take up room that your water and protein need.

When can coffee come back?

There is no single date for everyone. Your team looks at your healing, how well you keep up with fluids, symptoms such as heartburn, and your other health conditions. Some people are advised to keep caffeine out for longer, or for good.

Until your team says otherwise, decaf coffee and herbal tea let you keep the ritual. Decaf is not completely free of caffeine, but Health Canada lists about 3 mg in a cup of decaf coffee, compared with about 135 mg in a cup of brewed coffee.

How much caffeine is in common drinks

Health Canada's average values for an 8 oz (237 mL) cup:

• Brewed coffee: about 135 mg. Filter drip coffee: about 179 mg.
• Instant coffee: about 76 to 106 mg.
• Black or green tea, brewed: about 30 to 50 mg.
• Decaf coffee: about 3 mg. Decaf tea: about 0 mg.

Café cups are often larger than 8 oz, so one cup can hold much more. Health Canada's limit for healthy adults is 400 mg a day, and 300 mg for people who are pregnant, breastfeeding or planning a pregnancy. These are upper limits for the general population, not a target. After a sleeve, follow what your team advises for you.

Coffee, meals and iron

Keeping your iron up is part of long-term care after a sleeve. In a classic study in adults who had not had surgery, a cup of coffee with a meal lowered the iron absorbed from that meal by 39%, and tea lowered it by 64%. Coffee taken an hour before the meal had no effect, but coffee an hour after the meal still lowered it.

If coffee or tea becomes part of your day again, ask your dietitian how to time it around your meals, your multivitamin and any iron you take.

If your team says yes

• Start with one small cup and notice how your stomach feels.
• Keep it plain, or add a little milk. Large sweetened café drinks, syrups and whipped cream add sugar and calories, and in some people sugar can cause dumping.
• Skip energy drinks. Many are fizzy and sweet as well as high in caffeine.
• Sip slowly, between meals, and keep water your main drink.
• Stop and call your team if coffee brings on heartburn or stomach pain.

What to ask your care team

• When can I try caffeine again, if at all?
• How much is okay for me, with my health and my medicines?
• How should I time coffee or tea around my vitamins and iron?