Starting a new f&b business. What happens if my customer gets food poisoning? Will I get sued or not?

Yes, food poisoning cases can absolutely result in lawsuits against your company.

The Spize case in 2018 is a prime example of just awry things can become when serous food poisoning occurs. If you're not familiar with the case, Spize was a quick-serve casual restaurant with several outlets in Singapore. In 2018, multiple people became sick after eating bento boxes that Spize had prepared. One person who ate their mean, a 38 year old man, passed away. Cases like this could very well happen to your F&B business.
To protect your F&B business, there's food poisoning insurance that will pay for lawyer's fees and legal damages if you get sued for food poisoning. This is especially important since you're just starting a new business, and probably won't have significant cash reserves to pay out legal claims.

Here are some useful links to get Food and Beverage insurance:

1. Cafe insurance

2. Restaurant insurance

3. Pub insurance

4. Bar insurance

5. Hawker insurance

6. Caterer insurance

7. Baker insurance (includes home bakers)

8. Food manufacturing insurance (e.g. mass-producing biscuits, canned foods, etc.)