Is it ok to eat chlorella?
Quick Answer
Yes
Chlorella is generally safe to eat. It’s a type of algae that’s rich in several vitamins, minerals, and antioxidants. However, it may cause side effects in some people.

What Is It?
Chlorella is a type of green algae that grows in fresh water. It is a rich source of many nutrients, including proteins, vitamins, and minerals.
Historical Context
Chlorella has been used as a dietary supplement since the 1940s. It was initially studied as a potential source of protein and as a way to recycle waste products.
Why It Can Be Risky
While chlorella is generally safe for most people, it can cause side effects in some individuals.
- Chlorella can cause digestive upset, including gas, bloating, diarrhea, and nausea.
- It may also cause allergic reactions in some people, including hives, swelling, and difficulty breathing.
- Chlorella can interact with certain medications, including blood thinners and immune suppressants.
Safe Method?
To minimize potential side effects, start with a small dose of chlorella and gradually increase your intake over time.
Safe Alternatives
Other nutrient-rich algae that can be used as alternatives to chlorella include spirulina and blue-green algae.