The follow-ups are the operation working. Absorption changed permanently, and blood tests are how anyone knows whether the supplements are keeping up.
How often
The published nutritional guideline defines routine post-surgical screening as "performing a nutrient assessment every 3–6 months in the first year and annually thereafter, unless otherwise specified" (Parrott J et al., Surgery for Obesity and Related Diseases, 2017 · doi:10.1016/j.soard.2016.12.018).
Loopa turns that into a calendar from the procedure date you enter: a reminder at three months, six months, twelve months, and every year after that. Where your care team has sent in their own schedule, theirs replaces it.
What tends to be checked
The guideline covers thiamin, vitamin B12, folate, iron and ferritin, calcium and vitamin D with parathyroid hormone, the fat-soluble vitamins A, E and K, zinc and copper (Parrott J et al., Surgery for Obesity and Related Diseases, 2017 · doi:10.1016/j.soard.2016.12.018).
Which of these your team checks, and how often, is theirs to decide. A duodenal switch is watched more closely than a band.
Loopa holds no reference ranges
Deliberately. You can record a lab value in Loopa and see how it has moved over time, in the units you entered, unconverted. What the app will never do is tell you a number is high, low or normal. That is an interpretation, it depends on the laboratory and on you, and it belongs to the person who ordered the test.
What long-term management looks like
The 2022 indications statement is explicit that "severe obesity is a chronic disease requiring long-term management after primary MBS" (Eisenberg D et al., Obesity Surgery, 2023 · doi:10.1007/s11695-022-06332-1). In practice:
- Supplements, daily, permanently
- Labs on the schedule above
- Protein first, and a protein target you still hit
- Activity you keep. Exercise after surgery may help prevent bone loss and weight regain (Fernández-Alonso M et al., Surgery for Obesity and Related Diseases, 2025 · doi:10.1016/j.soard.2024.11.005)
- An honest check on alcohol. See Alcohol after weight-loss surgery
- Attending the appointments, including the ones where nothing seems wrong
Related
Where this comes from
Everything on this page is drawn from published clinical guidelines and peer-reviewed research, cited above. The full list, with a link to every original, is at loopahealth.app/sources. Loopa does not give medical advice. It does not decide whether a procedure is right for you, does not recommend one over another, and never sets a dose. Your care team does all three, and where they give you an instruction, theirs is the one to follow.
