I Got a B in Orgo. Am I Cooked?

It is the single most common post on premed forums, and it usually arrives at 11 p.m. on the day grades post. "I got a B in orgo. Is it over?"

No. Sit down. Let your big sibling walk you through this with a calculator, because the arithmetic alone should fix about 80 percent of your panic.

Let's Do the Arithmetic

Here is what one B in a four-credit organic chemistry course does to a transcript that was otherwise straight A's.

Three hundredths of a point on a finished degree. Seven hundredths if you are halfway through. The science GPA takes a slightly bigger hit, a tenth of a point, because there are fewer science credits to dilute it, and AMCAS calculates that BCPM number separately.

Now put that next to the actual landscape. The median undergraduate GPA among 2025-2026 matriculants was 3.87, and the mean was 3.81. A 3.97 sits comfortably above both. Even the halfway-through version at 3.93 clears them.

You did not fall off a cliff. You took a small step down a very gentle hill.

Orgo Is Built to Do This

Second thing worth knowing: the course did this on purpose, and admissions committees are aware.

Researchers at the Gardner Institute have a working definition of a weed-out course. High enrollment, lecture based, and high rates of D grades, F grades, and withdrawals, often driven by grade curving. Their study of introductory chemistry across 31 institutions found an average rate of 29.4 percent for D, F, withdrawal, or incomplete. In an analysis of six institutions, chemistry accounted for 22 percent of all courses meeting the weed-out definition.

That same reporting includes a detail worth sitting with. In those introductory chemistry courses, the D, F and withdrawal rates for Black and Latinx students ran above 40 percent. Curves tend to reward students who arrive with more preparation, which is a property of the grading system rather than a measure of who will be a good physician.

A 2025 analysis of bioscience and health-major students found that chemistry courses carried some of the lowest average grades of any courses studied, with Organic Chemistry 2 at the very bottom during remote instruction.

The forums tell the same story in less formal language. One Student Doctor Network thread has people counting attrition like a nature documentary. Eight hundred premeds entering, 400 after general chemistry, 270 after orgo one, 210 after orgo two.

So here is your reframe. You earned a B in a curved course where roughly three in ten students do not finish with a passing grade at all. In that context a B is a perfectly respectable outcome, and it is not remotely the outlier your group chat believes it to be.

What Committees Do With One Grade

MD admissions runs on holistic review, which means the committee reads a transcript as a story rather than a single number. What they look for in that story is direction.

A single B in a prerequisite, followed by solid grades in upper-level science, reads as a normal human semester. The thing that raises questions is a pattern: several weak science grades, repeats, withdrawals, or a line that trends downward over time. One data point is not a pattern. It is a data point.

And even when the damage is much larger than one B, the numbers are kinder than the panic suggests.

Read the bottom of that chart, not the top. Across those three cycles, 6,660 applicants with GPAs between 3.40 and 3.59 were accepted to an MD program. Another 2,696 with GPAs between 3.20 and 3.39. Those are thousands of real people with stethoscopes whose transcripts contain much worse than one B.

Your 3.97 is not in that conversation. You are in the top band, where nearly two in three applicants get in somewhere.

So, practically:

• Do not retake it. AMCAS counts every attempt, so a retake adds a grade rather than erasing one. Spending a semester and tuition to move a 3.97 to a 3.99 is a poor trade. Retakes are for eligibility problems and genuine gaps in mastery.
• Do not write about it. A single B needs no explanation anywhere in your application. Explaining it draws attention to something nobody flagged and makes you look like you cannot tell a small thing from a big one.
• Do the next semester well. Direction is the thing committees read. Strong upper-level science after a B turns the B into background texture.
• Notice if the B is telling you something real. If orgo was hard because your study method was passive rereading, that is worth fixing now, since the same habit will show up on content review and on the MCAT^®. A grade can be useful information without being a verdict.
• Remember where you heard the panic. "Is one B in orgo the end?" is literally a square on the premed forum bingo card. The people answering it are mostly sophomores.

One B in the hardest course on the premed track, in a class engineered to spread people out, on a transcript that is otherwise excellent. You are not cooked. You are a person who took organic chemistry.

Go to bed.

Sources

• AAMC FACTS Table A-23 acceptance data, via MedicalAid
• Chemical & Engineering News, Weeding Out Inequity in Undergraduate Chemistry Classes
• Trends and Gender Disparities in Grades Among Bioscience and Health-Related Majors (2025)
• Student Doctor Network, Which Pre-req Is the Weed-Out Course at Your Undergrad?
• Inspira Advantage, How Medical School Admissions Committees Assess Applications
• The MBA Exchange, Does One C Hurt Medical School Admissions?