b-complex

noun
UK /ˌbiː ˈkɒmpleks/
US /ˌbiː ˈkɑːmpleks/

B-complex is a group of vitamins that help your body make energy and stay healthy.

The doctor said to take a B-complex vitamin every morning with breakfast.


OTHER MEANINGS

2. A mixture of several B vitamins sold as a dietary supplement.

She bought a bottle of B-complex at the pharmacy.

3. The set of water-soluble vitamins that includes B1, B2, B3, B5, B6, B7, B9, and B12.

Nutrition class covered the whole B-complex and what each vitamin does.

4. A building or system made of multiple connected parts (general sense of 'complex').

The new sports complex has a pool, a gym, and tennis courts.