Mamie Sebion appeals from a denial of social security disability benefits under 42 U.S.C. § 416(i) (1982) and 42 U.S.C. § 423 (1982). The district court found substantial evidence on the record as a whole to support the finding by the administrative law judge (AU) that Sebion was not disabled within the meaning of the Act. 1 We affirm.

Sebion filed an initial application for disability benefits on January 16, 1980, alleging she had become disabled as of April 20, 1979, because of ulcers, a hernia and colon trouble. The initial application was denied as was an application for reconsideration. Sebion then requested a hearing where an AU took testimony and evidence and denied the claim. The Appeals Council affirmed. The district court thereafter remanded for a supplemental hearing for further findings. 2 Following this hearing the AU denied benefits. This denial was affirmed by the Appeals Council as well as the district court.

*961 We must determine whether the Secretary’s decision is supported by substantial evidence on the record as a whole. 42 U.S.C. § 405(g) (1976 & Supp. V 1981). Clark v. Heckler, 733 F.2d 65, 68 (8th Cir. 1984); Baugus v. Secretary of Health & Human Services, 717 F.2d 443, 445 (8th Cir. 1983).

Sebion was 61 years old at the time of her initial application and had a third or fourth grade education. When she applied for social security benefits, Sebion claimed she was suffering from ulcers, a hernia, and colon trouble. Sebion claimed she had suffered from these problems since 1963, but was not prevented from working as a cook and a waitress until April 20, 1979. At the hearing Sebion claimed she also suffers from arthritis. 3 Sebion’s medical records indicate that she was hospitalized for the periods of October 17 to October 25 of 1979 and October 31 to November 9 of 1979 for an acute gallbladder attack and gallbladder removal. She was treated in the emergency room on June 24, 1980 for an ankle injury. She was diagnosed on May 4, 1981 as having a peptic ulcer disease. She was also hospitalized from July 1 to July 4 of 1982 for removal of a benign thyroid tumor. Sebion was examined by her treating physician on December 6, 1979. A consultative examination was done on February 16, 1980 for the Social Security Administration. Both of these examinations revealed that Sebion had no limitation of motion. Sebion’s treating physician prescribed certain medications and a bland diet for the ulcer symptoms. However, Sebion testified at the hearing that she did not take the medications as directed and did not follow a bland diet.

None of the evidence or testimony, including the records of Dr. Laurenzana (Sebion’s treating physician), indicate that Sebion suffers from a severe disability as defined in 20 C.F.R. §§ 404.1520(c) (1984) which would inhibit her from performing her past relevant work. The AU made explicit credibility findings which comport with the evidence and testimony. The AU questioned Sebion at both the initial and supplemental hearings regarding her symptoms, activities, treatment, work history and pain. 4 Although conflicts in the evidence did exist, it is for the AU to reconcile them. Clark v. Heckler, 733 F.2d at 68. We find that our review of the evidence supports the AU’s decision. See Weber v. Harris, 640 F.2d 176, 178 (8th Cir. 1981). Sebion has not met her burden of demonstrating that she cannot perform substantial gainful activity. Weber, at 177. Accordingly, we affirm the district court.