Berkeley Wellness Letter on Sun Chlorella - April 2003

Q: Is there any scientific basis for the claim that sun chlorella boosts energy?

A: No. This freshwater green algae contains chlorophyll, a substance in all green plants that enables them to turn sunlight into energy, but is of no use to the human body. Like other algae and land-grown plants, chlorella also contains some protein, vitamins (including vitamin K), and minerals. But chlorella powder or tablets won’t boost your energy any more than a serving of greens will. Less, in fact.

Manufacturers claim that chlorella recharges immunity, prevents colds, slows aging, cures fibromyalgia and cancer, and performs other miracles. One seller promises it will help you both lose and gain weight. However, there’s no convincing evidence that chlorella benefits humans in any way.

Chlorella can cause unpleasant intestinal symptoms. In its natural state, chlorella cannot be digested—it has to be treated to break down its strong cell wall. Most of what’s sold here is cultivated and processed in Japan or Taiwan.

You won’t get anything from chlorella that you can’t get from kale or other greens. If you want to eat algae, try some of the seaweed products found in Asian and other specialty markets, as well as in some restaurants. Sea vegetables are good food, but no better for you than land-grown vegetables. Chlorella supplements are a waste of money.

Your Health and Mine