B12

B12 may refer to:

• Vitamin B₁₂, a water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood

B12 or B-12 may also refer to:

Biology

• Envelope glycoprotein GP120#gp120 vaccines, an antibody against the HIV surface protein gp120 found in some long-term nonprogressors
• HLA-B12, an HLA - B serotype

Entertainment

• Brandon C. Rodegeb (born 1977), American music executive, film-maker, rap artist, writer known as B12
• B12 (band), a British electronic music duo
• B12, a song by the grunge band Grey Daze led by Chester Bennington

Transportation

• Alpina B12, a car model by German manufacturer Alpina
• Bensen B-12, a 1961 American unconventional aircraft
• Chery B12, a 2007 Chinese Chery Automobile model
• LNER Class B12, a class of steam railway locomotive
• Queensland B12 class locomotive, a class of steam railway locomotive
• B120 series (Sunny Truck), a car model by Japanese manufacturer Nissan
• B12, a modified version of the Martin B-10 bomber

Other uses

• B12, a student model clarinet manufactured by Buffet Crampon
• B12 (New York City bus), a bus line serving Brooklyn
• Caro–Kann Defence, a common opening in the game of chess