Yes NAC, a supplement available online.
Buy a quality one.
I have used this for over 10 years as a supplement and just increase the dose if I have a cough/chest infection.
Here’s the technical blurb.
Yes, N-acetylcysteine (NAC) is highly effective at managing mucus. It acts as a powerful mucolytic agent that breaks down thick, stubborn secretions, making them easier to clear from your airways.Here is how it works and what you should know:How it Thins Mucus: NAC disrupts the protein (disulfide) bonds in mucus. This physically decreases its thickness and elasticity, turning sticky mucus into a looser, more watery consistency.Reduces Inflammation: It also acts as an antioxidant and anti-inflammatory agent, which helps reduce swelling in your bronchial tubes and airways.Typical Uses: Doctors often use NAC for conditions that involve excess or hardened mucus, such as chronic bronchitis, COPD, asthma, and cystic fibrosis.