https://virginiabariatric.com/ weekly 1.0 https://virginiabariatric.com/__l5e/assets-v1/1b4a36e2-a4c1-4d18-8e66-9b1cc1b04b5f/hero-1280.webp Achieve the lifestyle you've always wanted https://virginiabariatric.com/__l5e/assets-v1/140963b9-35ab-4112-ae0d-61af80ddd09a/dr-fitzer-home-900.webp Portrait of Dr. Matthew Fitzer, board-certified bariatric surgeon at Virginia Bariatric Center https://virginiabariatric.com/about monthly 0.8 https://virginiabariatric.com/__l5e/assets-v1/140963b9-35ab-4112-ae0d-61af80ddd09a/dr-fitzer-home-900.webp Portrait of Dr. Matthew Fitzer, board-certified bariatric surgeon at Virginia Bariatric Center https://virginiabariatric.com/team monthly 0.7 https://virginiabariatric.com/our-program monthly 0.8 https://virginiabariatric.com/__l5e/assets-v1/dd1ce9ba-b8e2-4344-9c0f-9ba283f23732/program-journey.jpg Virginia Bariatric patient shown before and after her bariatric surgery weight-loss journey https://virginiabariatric.com/contact monthly 0.8 https://virginiabariatric.com/appointments monthly 0.9 https://virginiabariatric.com/results monthly 0.8 https://virginiabariatric.com/img/slide-29-900.webp Paula C.'s side-by-side weight-loss transformation after bariatric surgery with Dr. Matthew Fitzer in Northern Virginia. Paula C. — before and after weight-loss surgery (#paula-c-1) https://virginiabariatric.com/img/results/slide-30-800.webp An anonymous patient's before-and-after weight-loss result following bariatric surgery at Virginia Bariatric Center. An anonymous Virginia Bariatric patient — before and after weight-loss surgery (#an-anonymous-virginia-bariatric-patient-2) https://virginiabariatric.com/img/results/slide-7-before-495.webp An anonymous patient back on the dance floor after weight-loss surgery with Dr. Matthew Fitzer. An anonymous patient who got her groove back — before weight-loss surgery (#an-anonymous-patient-who-got-her-groove-back-3) https://virginiabariatric.com/img/results/slide-7-after-495.webp An anonymous patient back on the dance floor after weight-loss surgery with Dr. Matthew Fitzer. An anonymous patient who got her groove back — after weight-loss surgery (#an-anonymous-patient-who-got-her-groove-back-3) https://virginiabariatric.com/img/results/slide-21-before-371.webp A full-length before-and-after comparison of an anonymous Virginia Bariatric Center patient. An anonymous full-length transformation — before weight-loss surgery (#an-anonymous-full-length-transformation-4) https://virginiabariatric.com/img/results/slide-21-after-371.webp A full-length before-and-after comparison of an anonymous Virginia Bariatric Center patient. An anonymous full-length transformation — after weight-loss surgery (#an-anonymous-full-length-transformation-4) https://virginiabariatric.com/img/results/slide-22-before-782.webp A head-to-toe before-and-after comparison of an anonymous bariatric surgery patient in Northern Virginia. An anonymous head-to-toe transformation — before weight-loss surgery (#an-anonymous-head-to-toe-transformation-5) https://virginiabariatric.com/img/results/slide-22-after-782.webp A head-to-toe before-and-after comparison of an anonymous bariatric surgery patient in Northern Virginia. An anonymous head-to-toe transformation — after weight-loss surgery (#an-anonymous-head-to-toe-transformation-5) https://virginiabariatric.com/img/results/slide-24-before-320.webp An anonymous patient's before-and-after change following weight-loss surgery at Virginia Bariatric Center. An anonymous patient's one-year change — before weight-loss surgery (#an-anonymous-patient-s-one-year-change-6) https://virginiabariatric.com/img/results/slide-24-after-320.webp An anonymous patient's before-and-after change following weight-loss surgery at Virginia Bariatric Center. An anonymous patient's one-year change — after weight-loss surgery (#an-anonymous-patient-s-one-year-change-6) https://virginiabariatric.com/img/results/slide-25-before-283.webp M. M. before and after weight-loss surgery with Dr. Matthew Fitzer at Virginia Bariatric Center. M. M. — before weight-loss surgery (#m-m-7) https://virginiabariatric.com/img/results/slide-25-after-700.webp M. M. before and after weight-loss surgery with Dr. Matthew Fitzer at Virginia Bariatric Center. M. M. — after weight-loss surgery (#m-m-7) https://virginiabariatric.com/img/results/slide-26-before-316.webp L. S. photographed before and after bariatric surgery in Northern Virginia. L. S. — before weight-loss surgery (#l-s-8) https://virginiabariatric.com/img/results/slide-26-after-400.webp L. S. photographed before and after bariatric surgery in Northern Virginia. L. S. — after weight-loss surgery (#l-s-8) https://virginiabariatric.com/img/results/slide-27-before-563.webp JDB's before-and-after weight-loss result following surgery with Dr. Matthew Fitzer. JDB — before weight-loss surgery (#jdb-9) https://virginiabariatric.com/img/results/slide-27-after-319.webp JDB's before-and-after weight-loss result following surgery with Dr. Matthew Fitzer. JDB — after weight-loss surgery (#jdb-9) https://virginiabariatric.com/img/results/slide-28-before-192.webp Jack A. before and after his bariatric surgery journey at Virginia Bariatric Center. Jack A. — before weight-loss surgery (#jack-a-10) https://virginiabariatric.com/img/results/slide-28-after-192.webp Jack A. before and after his bariatric surgery journey at Virginia Bariatric Center. Jack A. — after weight-loss surgery (#jack-a-10) https://virginiabariatric.com/img/results/slide-23-before-800.webp Shelly T.'s side-by-side weight-loss transformation after surgery with Dr. Matthew Fitzer. Shelly T. — before weight-loss surgery (#shelly-t-11) https://virginiabariatric.com/img/results/slide-23-after-800.webp Shelly T.'s side-by-side weight-loss transformation after surgery with Dr. Matthew Fitzer. Shelly T. — after weight-loss surgery (#shelly-t-11) https://virginiabariatric.com/img/results/slide-9-before-640.webp Alfred and Patricia Crews, a couple who had weight-loss surgery together at Virginia Bariatric Center. Alfred and Patricia Crews — before weight-loss surgery (#alfred-and-patricia-crews-12) https://virginiabariatric.com/img/results/slide-9-after-640.webp Alfred and Patricia Crews, a couple who had weight-loss surgery together at Virginia Bariatric Center. Alfred and Patricia Crews — after weight-loss surgery (#alfred-and-patricia-crews-12) https://virginiabariatric.com/img/results/slide-13-800.webp Amanda G. showing her weight-loss progress after bariatric surgery in Northern Virginia. Amanda G. — before and after weight-loss surgery (#amanda-g-13) https://virginiabariatric.com/img/results/slide-14-before-444.webp Amanda G. at a later milestone in her weight-loss journey with Dr. Matthew Fitzer. Amanda G. at a later milestone — before weight-loss surgery (#amanda-g-at-a-later-milestone-14) https://virginiabariatric.com/img/results/slide-14-after-444.webp Amanda G. at a later milestone in her weight-loss journey with Dr. Matthew Fitzer. Amanda G. at a later milestone — after weight-loss surgery (#amanda-g-at-a-later-milestone-14) https://virginiabariatric.com/img/results/slide-3-before-800.webp Amanda R. before and nearly two years after her gastric sleeve surgery with Dr. Matthew Fitzer. Amanda R. — before weight-loss surgery (#amanda-r-15) https://virginiabariatric.com/img/results/slide-3-after-800.webp Amanda R. before and nearly two years after her gastric sleeve surgery with Dr. Matthew Fitzer. Amanda R. — after weight-loss surgery (#amanda-r-15) https://virginiabariatric.com/img/results/slide-16-before-640.webp Ban H.'s before-and-after weight-loss comparison following bariatric surgery in Northern Virginia. Ban H. — before weight-loss surgery (#ban-h-16) https://virginiabariatric.com/img/results/slide-16-after-794.webp Ban H.'s before-and-after weight-loss comparison following bariatric surgery in Northern Virginia. Ban H. — after weight-loss surgery (#ban-h-16) https://virginiabariatric.com/img/results/slide-8-before-720.webp Chad Beckhert one year after his weight-loss surgery at Virginia Bariatric Center. Chad Beckhert — before weight-loss surgery (#chad-beckhert-17) https://virginiabariatric.com/img/results/slide-8-after-720.webp Chad Beckhert one year after his weight-loss surgery at Virginia Bariatric Center. Chad Beckhert — after weight-loss surgery (#chad-beckhert-17) https://virginiabariatric.com/img/results/slide-5-before-800.webp Cynthia Welgoss, who began her surgical weight-loss journey with a BMI of 35, before and after. Cynthia Welgoss — before weight-loss surgery (#cynthia-welgoss-18) https://virginiabariatric.com/img/results/slide-5-after-800.webp Cynthia Welgoss, who began her surgical weight-loss journey with a BMI of 35, before and after. Cynthia Welgoss — after weight-loss surgery (#cynthia-welgoss-18) https://virginiabariatric.com/img/results/slide-11-before-800.webp E.M. and his mother, both weight-loss surgery patients of Dr. Matthew Fitzer. E.M. and his mom — before weight-loss surgery (#e-m-and-his-mom-19) https://virginiabariatric.com/img/results/slide-11-after-800.webp E.M. and his mother, both weight-loss surgery patients of Dr. Matthew Fitzer. E.M. and his mom — after weight-loss surgery (#e-m-and-his-mom-19) https://virginiabariatric.com/img/results/slide-15-before-640.webp A Virginia Bariatric Center patient in Halloween costume before and after weight-loss surgery. A Halloween-costume transformation — before weight-loss surgery (#a-halloween-costume-transformation-20) https://virginiabariatric.com/img/results/slide-15-after-640.webp A Virginia Bariatric Center patient in Halloween costume before and after weight-loss surgery. A Halloween-costume transformation — after weight-loss surgery (#a-halloween-costume-transformation-20) https://virginiabariatric.com/img/results/slide-2-before-800.webp Jason Lamprey before and after his bariatric surgery with Dr. Matthew Fitzer. Jason Lamprey — before weight-loss surgery (#jason-lamprey-21) https://virginiabariatric.com/img/results/slide-2-after-800.webp Jason Lamprey before and after his bariatric surgery with Dr. Matthew Fitzer. Jason Lamprey — after weight-loss surgery (#jason-lamprey-21) https://virginiabariatric.com/img/results/slide-18-before-540.webp Kristina and Sean, a couple who had weight-loss surgery together in Northern Virginia. Kristina and Sean — before weight-loss surgery (#kristina-and-sean-22) https://virginiabariatric.com/img/results/slide-18-after-528.webp Kristina and Sean, a couple who had weight-loss surgery together in Northern Virginia. Kristina and Sean — after weight-loss surgery (#kristina-and-sean-22) https://virginiabariatric.com/img/results/slide-17-before-800.webp Lori M.'s before-and-after weight-loss result following surgery at Virginia Bariatric Center. Lori M. — before weight-loss surgery (#lori-m-23) https://virginiabariatric.com/img/results/slide-17-after-800.webp Lori M.'s before-and-after weight-loss result following surgery at Virginia Bariatric Center. Lori M. — after weight-loss surgery (#lori-m-23) https://virginiabariatric.com/img/results/slide-19-before-462.webp Lorraine W. photographed before and after her bariatric surgery with Dr. Matthew Fitzer. Lorraine W. — before weight-loss surgery (#lorraine-w-24) https://virginiabariatric.com/img/results/slide-19-after-800.webp Lorraine W. photographed before and after her bariatric surgery with Dr. Matthew Fitzer. Lorraine W. — after weight-loss surgery (#lorraine-w-24) https://virginiabariatric.com/img/results/slide-10-before-720.webp Lucretia Dennington's side-by-side weight-loss transformation in Northern Virginia. Lucretia Dennington — before weight-loss surgery (#lucretia-dennington-25) https://virginiabariatric.com/img/results/slide-10-after-800.webp Lucretia Dennington's side-by-side weight-loss transformation in Northern Virginia. Lucretia Dennington — after weight-loss surgery (#lucretia-dennington-25) https://virginiabariatric.com/img/results/slide-4-before-800.webp Michael T. before and after the surgery he says changed his life. Michael T. — before weight-loss surgery (#michael-t-26) https://virginiabariatric.com/img/results/slide-4-after-800.webp Michael T. before and after the surgery he says changed his life. Michael T. — after weight-loss surgery (#michael-t-26) https://virginiabariatric.com/img/results/slide-12-before-486.webp Mr. G after his weight-loss surgery at Virginia Bariatric Center. Mr. G — before weight-loss surgery (#mr-g-27) https://virginiabariatric.com/img/results/slide-12-after-486.webp Mr. G after his weight-loss surgery at Virginia Bariatric Center. Mr. G — after weight-loss surgery (#mr-g-27) https://virginiabariatric.com/img/results/slide-1-before-800.webp Shona Gardner three years after her weight-loss surgery with Dr. Matthew Fitzer. Shona Gardner — before weight-loss surgery (#shona-gardner-28) https://virginiabariatric.com/img/results/slide-1-after-800.webp Shona Gardner three years after her weight-loss surgery with Dr. Matthew Fitzer. Shona Gardner — after weight-loss surgery (#shona-gardner-28) https://virginiabariatric.com/img/results/slide-6-before-480.webp Tawana B.'s before-and-after weight-loss comparison following bariatric surgery. Tawana B. — before weight-loss surgery (#tawana-b-29) https://virginiabariatric.com/img/results/slide-6-after-800.webp Tawana B.'s before-and-after weight-loss comparison following bariatric surgery. Tawana B. — after weight-loss surgery (#tawana-b-29) https://virginiabariatric.com/img/results/slide-20-before-800.webp Tiffany W. before and after her weight-loss surgery at Virginia Bariatric Center. Tiffany W. — before weight-loss surgery (#tiffany-w-30) https://virginiabariatric.com/img/results/slide-20-after-800.webp Tiffany W. before and after her weight-loss surgery at Virginia Bariatric Center. Tiffany W. — after weight-loss surgery (#tiffany-w-30) https://virginiabariatric.com/img/kcampos-before-800.webp K. Campos before and after gastric sleeve surgery with Dr. Matthew Fitzer in Northern Virginia. K. Campos — before weight-loss surgery (#k-campos-31) https://virginiabariatric.com/img/kcampos-after-800.webp K. Campos before and after gastric sleeve surgery with Dr. Matthew Fitzer in Northern Virginia. K. Campos — after weight-loss surgery (#k-campos-31) https://virginiabariatric.com/img/newstory-before-800.webp K. S.'s full-length before-and-after weight-loss transformation at Virginia Bariatric Center. K. S. — before weight-loss surgery (#k-s-32) https://virginiabariatric.com/img/newstory-after-800.webp K. S.'s full-length before-and-after weight-loss transformation at Virginia Bariatric Center. K. S. — after weight-loss surgery (#k-s-32) https://virginiabariatric.com/results/story/paula-c-1 monthly 0.5 https://virginiabariatric.com/results/story/an-anonymous-virginia-bariatric-patient-2 monthly 0.5 https://virginiabariatric.com/results/story/an-anonymous-patient-who-got-her-groove-back-3 monthly 0.5 https://virginiabariatric.com/results/story/an-anonymous-full-length-transformation-4 monthly 0.5 https://virginiabariatric.com/results/story/an-anonymous-head-to-toe-transformation-5 monthly 0.5 https://virginiabariatric.com/results/story/an-anonymous-patient-s-one-year-change-6 monthly 0.5 https://virginiabariatric.com/results/story/m-m-7 monthly 0.5 https://virginiabariatric.com/results/story/l-s-8 monthly 0.5 https://virginiabariatric.com/results/story/jdb-9 monthly 0.5 https://virginiabariatric.com/results/story/jack-a-10 monthly 0.5 https://virginiabariatric.com/results/story/shelly-t-11 monthly 0.5 https://virginiabariatric.com/results/story/alfred-and-patricia-crews-12 monthly 0.5 https://virginiabariatric.com/results/story/amanda-g-13 monthly 0.5 https://virginiabariatric.com/results/story/amanda-g-at-a-later-milestone-14 monthly 0.5 https://virginiabariatric.com/results/story/amanda-r-15 monthly 0.5 https://virginiabariatric.com/results/story/ban-h-16 monthly 0.5 https://virginiabariatric.com/results/story/chad-beckhert-17 monthly 0.5 https://virginiabariatric.com/results/story/cynthia-welgoss-18 monthly 0.5 https://virginiabariatric.com/results/story/e-m-and-his-mom-19 monthly 0.5 https://virginiabariatric.com/results/story/a-halloween-costume-transformation-20 monthly 0.5 https://virginiabariatric.com/results/story/jason-lamprey-21 monthly 0.5 https://virginiabariatric.com/results/story/kristina-and-sean-22 monthly 0.5 https://virginiabariatric.com/results/story/lori-m-23 monthly 0.5 https://virginiabariatric.com/results/story/lorraine-w-24 monthly 0.5 https://virginiabariatric.com/results/story/lucretia-dennington-25 monthly 0.5 https://virginiabariatric.com/results/story/michael-t-26 monthly 0.5 https://virginiabariatric.com/results/story/mr-g-27 monthly 0.5 https://virginiabariatric.com/results/story/shona-gardner-28 monthly 0.5 https://virginiabariatric.com/results/story/tawana-b-29 monthly 0.5 https://virginiabariatric.com/results/story/tiffany-w-30 monthly 0.5 https://virginiabariatric.com/results/story/k-campos-31 monthly 0.5 https://virginiabariatric.com/results/story/k-s-32 monthly 0.5 https://virginiabariatric.com/dr-fitzer-dissects-the-news weekly 0.7 https://virginiabariatric.com/services 2026-08-09 weekly 0.9 https://virginiabariatric.com/services/sleeve monthly 0.8 https://virginiabariatric.com/__l5e/assets-v1/4977bbe0-c4fa-4596-bb10-510ecfa2dd36/sleeve-gastrectomy.jpg Illustration of a sleeve gastrectomy showing the banana-shaped stomach tube https://virginiabariatric.com/__l5e/assets-v1/5f8daa6d-da4e-45e7-a9a5-41c7e25c435c/sleeve-excess-weight-loss-percentage-graph.png Average excess weight loss percentage after laparoscopic sleeve gastrectomy at Virginia Bariatric Center, from 1 month through 10 years Sleeve gastrectomy 10-year excess weight loss chart https://virginiabariatric.com/__l5e/assets-v1/fdae1a5e-9854-4955-806d-1209e62cbb9d/sleeve-fitzer-1.png Upper GI contrast study of a properly narrowed gastric sleeve created by Dr. Fitzer at Virginia Bariatric Center https://virginiabariatric.com/__l5e/assets-v1/10d69194-17b5-4897-aee6-28e82506b256/sleeve-fitzer-2.png Post-operative imaging of a slim, tubular gastric sleeve after laparoscopic sleeve gastrectomy by Dr. Fitzer in Northern Virginia https://virginiabariatric.com/__l5e/assets-v1/f6b906c4-320b-4137-b034-793799db7506/sleeve-fitzer-3.jpg Contrast imaging of a Dr. Fitzer sleeve gastrectomy showing correct narrow diameter along the entire staple line https://virginiabariatric.com/__l5e/assets-v1/85ab3722-6530-460d-82f8-d0a4ac8cb9b3/sleeve-amateur-1.jpg Dilated, over-large sleeve gastrectomy referred to Dr. Fitzer for revisional bariatric surgery in Northern Virginia https://virginiabariatric.com/__l5e/assets-v1/fb831bcc-4b5d-4884-b268-bbf486acf69e/sleeve-amateur-2.png Upper GI study showing an incomplete 'trimmed' sleeve gastrectomy with retained fundus, sent to Dr. Fitzer for repair https://virginiabariatric.com/__l5e/assets-v1/4e0ace45-c0d7-419d-b2b7-6541b1a83ba0/sleeve-amateur-3.png CT scan of an oversized post-sleeve stomach with poor restriction, evaluated by Dr. Fitzer for sleeve revision surgery https://virginiabariatric.com/services/bypass monthly 0.8 https://virginiabariatric.com/__l5e/assets-v1/74ccf73e-eba6-4938-b183-7e920de66570/gastric-bypass-diagram.png Medical diagram of Roux-en-Y gastric bypass anatomy showing the small pouch and rerouted small intestine https://virginiabariatric.com/__l5e/assets-v1/27085d38-3c79-4bea-b2b5-72314bbdb181/bypass-weight-loss-graph.png Excess weight loss percentage after Roux-en-Y gastric bypass at Virginia Bariatric Center, from 1 month through 10 years post-surgery Roux-en-Y gastric bypass 10-year excess weight loss chart https://virginiabariatric.com/services/bypass-vs-sleeve monthly 0.8 https://virginiabariatric.com/__l5e/assets-v1/27085d38-3c79-4bea-b2b5-72314bbdb181/bypass-weight-loss-graph.png Excess weight loss percentage after Roux-en-Y gastric bypass at Virginia Bariatric Center, from 1 month through 10 years post-surgery Roux-en-Y gastric bypass 10-year excess weight loss chart https://virginiabariatric.com/__l5e/assets-v1/5f8daa6d-da4e-45e7-a9a5-41c7e25c435c/sleeve-excess-weight-loss-percentage-graph.png Average excess weight loss percentage after laparoscopic sleeve gastrectomy at Virginia Bariatric Center, from 1 month through 10 years Sleeve gastrectomy 10-year excess weight loss chart https://virginiabariatric.com/services/band monthly 0.8 https://virginiabariatric.com/services/balloon monthly 0.8 https://virginiabariatric.com/services/esg monthly 0.8 https://virginiabariatric.com/medical-weight-loss monthly 0.9 https://virginiabariatric.com/medical-weight-loss/medications monthly 0.8 https://virginiabariatric.com/medical-weight-loss/qualifications monthly 0.8 https://virginiabariatric.com/medical-weight-loss/insurance monthly 0.8 https://virginiabariatric.com/medical-weight-loss/insurance/medicaid-cova monthly 0.7 https://virginiabariatric.com/medical-weight-loss/insurance/medicare-tricare-fehb monthly 0.7 https://virginiabariatric.com/medical-weight-loss/insurance/commercial-marketplace monthly 0.7 https://virginiabariatric.com/medical-weight-loss/insurance/cash-pay-denials monthly 0.7 https://virginiabariatric.com/services/revisions monthly 0.8 https://virginiabariatric.com/__l5e/assets-v1/a911801b-da3a-447f-90ce-642b02cdcd62/mid-revision-1200.webp Laparoscopic gastric bypass pouch revision in Northern Virginia showing excess pouch resection and new smaller pouch with sizer bougie https://virginiabariatric.com/resources monthly 0.8 https://virginiabariatric.com/resources/faq monthly 0.7 https://virginiabariatric.com/resources/qualifications monthly 0.8 https://virginiabariatric.com/resources/insurance-coverage monthly 0.8 https://virginiabariatric.com/resources/forms monthly 0.7 https://virginiabariatric.com/resources/instructions monthly 0.7 https://virginiabariatric.com/resources/nutrition monthly 0.7 https://virginiabariatric.com/resources/obesity-and-diabetes monthly 0.7 https://virginiabariatric.com/resources/managing-weight-regain-after-bariatric-surgery monthly 0.8 https://virginiabariatric.com/resources/prosper monthly 0.6 https://virginiabariatric.com/resources/support monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/eye-problems-and-glp-1-medications 2026-08-10 monthly 0.6 https://virginiabariatric.com/__l5e/assets-v1/df430010-740f-4405-9425-01f57d684c0f/eye-macro-glp1.jpg Eye Problems and GLP-1 Meds: What We Know https://virginiabariatric.com/dr-fitzer-dissects-the-news/weight-regain-after-wegovy-zepbound-treatment-part-3 2026-05-25 monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/weight-regain-after-wegovy-zepbound-treatment-part-2 2026-05-17 monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/weight-regain-after-wegovy-zepbound-treatment-part-1 2026-05-17 monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/weight-regain-after-stopping-injectable-medication-whats-the-reality 2026-05-03 monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/semaglutide-versus-weight-loss-surgery-outcomes 2026-05-02 monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/our-ten-year-weight-loss-data 2026-04-19 monthly 0.6 https://virginiabariatric.com/dr-fitzer-dissects-the-news/why-are-gastric-bypass-patients-at-risk-for-alcoholism 2026-04-10 monthly 0.6