Chlorella

Chlorella is a single-cell green freshwater alga. It is one of the most chlorophyll-dense organisms on the planet. Each cell also carries carotenoids, beta-glucans in the cell wall and a mineral profile that includes iron and folate.^[1] Some chlorella products contain true vitamin B12. Others contain B12 analogues that are not active in the human body.^[1]

If you have heard about chlorella for skin, immunity or as a green superfood, this page covers the species you will see on labels, how much research uses and what the science actually shows for women.

Sources of chlorella

Two species dominate the supplement market. Chlorella vulgaris is the most studied in clinical trials. Chlorella pyrenoidosa is also sold widely. Most meta-analyses pool the two because head-to-head human comparisons are rare.^[1]

The bigger practical question is the cell wall. Chlorella cells have a tough cellulose wall that human digestion cannot break down efficiently. Broken-cell-wall chlorella has been mechanically processed so the contents are accessible to your gut. Most modern supplement-grade chlorella is broken-cell-wall for this reason.^[1]

Quality varies more for chlorella than for most supplements. It is grown in open ponds or closed bioreactors. It can concentrate heavy metals from its growing water. Look for products that publish heavy metal testing and that name the species and the cell-wall treatment on the label.^[1]

How much you need

Chlorella is a food. There is no recommended daily intake.

Doses in randomised trials vary widely. A 2026 meta-analysis of 18 trials in adults with overweight or obesity used daily chlorella doses ranging from 135 mg to 15,000 mg over one to twelve weeks.^[3] Most cardiovascular and metabolic trials sit between 1,000 mg and 5,000 mg per day. As part of a multi-ingredient greens complex in a daily food sachet, chlorella works as a whole-food source of chlorophyll and phytonutrients rather than as a clinical dose of any one compound.

The science on women's health

Skin and oxidative stress

The skin angle for chlorella is indirect. The strongest mechanism is antioxidant. Chlorophyll, carotenoids and chlorella-derived peptides scavenge reactive oxygen species, the same species that drive collagen breakdown and dull skin tone over time.^[1]

A 2026 meta-analysis of 18 trials in 717 adults found that chlorella raised antioxidant enzyme activity, including superoxide dismutase and catalase. The certainty of evidence was rated low to very low. Most trials were small and most ran in Iran. The signal is consistent. The evidence base is still thin.^[3]

A 2022 dose-response meta-analysis of 10 trials reported that chlorella vulgaris lowered total cholesterol by about 7 mg/dL and LDL by about 8 mg/dL versus control. The effect on LDL was strongest at doses below 1,500 mg per day.^[2] The shared thread with skin is the antioxidant pathway.

Immune function

Chlorella cell walls contain beta-glucans, a class of polysaccharide that interacts with receptors on immune cells. A 2022 review in Experimental and Molecular Medicine grouped chlorella alongside ginseng, mushrooms and probiotics as functional foods with documented effects on innate immune cell activity in laboratory and animal models. Human trials are smaller and less consistent.^[4]

A 2025 review of 61 trials covering algae supplementation, including chlorella and spirulina, found small reductions in body weight, body fat percentage and waist circumference versus placebo. GRADE certainty was low to very low.^[5] A 2026 NAFLD-focused review reported improvements in liver enzymes, fasting glucose and inflammatory markers. All included trials were from Iran. Generalisability to European women is limited.^[6]

EU authorised health claims

Under EU law, no specific health claim is currently authorised for chlorella. Botanical claims remain on hold at EU level while the European Food Safety Authority works through its review process. That means no nōuxx Green Glow communication can attach a specific health benefit to the chlorella in the formula.

Research suggests chlorella supplementation may improve markers of oxidative stress and lipid profile in some adult populations.^[2][3] Most trials are small and conducted in specific clinical groups rather than healthy women. Until larger trials in women confirm an effect at typical supplemental doses, we do not make formal health claims for chlorella.

References

[1] Bito T, Okumura E, Fujishima M, Watanabe F. Potential of Chlorella as a dietary supplement to promote human health. Nutrients 2020;12(9):2524. doi.org/10.3390/nu12092524

[2] Sherafati N, Bideshki MV, Behzadi M, et al. Effect of supplementation with Chlorella vulgaris on lipid profile in adults: a systematic review and dose-response meta-analysis of randomized controlled trials. Complementary Therapies in Medicine 2022;66:102822. doi.org/10.1016/j.ctim.2022.102822

[3] Jafari A, Mardani H, Mahmoudinezhad M, et al. Does Chlorella supplementation improve adiposity, metabolic dysfunction, and oxidative stress in individuals with excess weight? A systematic review and meta-analysis. Food Science & Nutrition 2026;14(4):e71715. doi.org/10.1002/fsn3.71715

[4] Kim JH, Kim DH, Jo S, et al. Immunomodulatory functional foods and their molecular mechanisms. Experimental & Molecular Medicine 2022;54(1):1-11. doi.org/10.1038/s12276-022-00724-0

[5] Kazeminejad S, Arzhang P, Baniasadi MM, et al. The effect of algae supplementation on anthropometric indices in adults: a GRADE-assessed systematic review and meta-analysis of randomized controlled trials. Nutrition Reviews 2025;83(3):405-421. doi.org/10.1093/nutrit/nuae151

[6] Jafari A, Mardani H, Nezhad BP, Hekmatdoost A. The beneficial effects of Chlorella vulgaris supplementation on health-related indices in patients with non-alcoholic fatty liver disease: a GRADE-assessed systematic review and meta-analysis. BMC Cardiovascular Disorders 2026;26(1). doi.org/10.1186/s12872-025-05433-w