NOW Supplements Spirulina

Spirulina inhibits allergic reactions

Possibly Effective

Based on 5 Researches

Kim HM, Lee EH, Cho HH, Moon YH. Inhibitory effect of mast cell-mediated immediate-type allergic reactions in rats by spirulina. Biochem Pharmacol. 1998;55:1071.

We explored how spirulina impacts mast cell-mediated allergic reactions. In our investigation, we found that spirulina significantly inhibited both systemic and local allergic responses in rats, completely blocking reactions induced by compound 48/80 when given in certain doses.

Additionally, we saw that spirulina reduced histamine levels and inhibited mast cell functions, which typically promote allergic reactions. These findings suggest that spirulina has a promising role in mitigating immediate-type allergies, both in laboratory settings and potentially for future practical applications.

Complete congestion relief

Most Useful Review

25 people found this helpful

Amazing allergy relief! After reading about spirulina's benefits, I decided to try it. I’m allergic to a variety of things and have tried numerous medications over the years, which left me suffering. This is the first time in 35 years that I've experienced zero congestion. It's simply wonderful!

Updated: Mar 2026

Arthritis details

Noticeable pain reduction

15 people found this helpful

Good for my Arthritis! I began taking spirulina a couple of months ago when my osteoarthritis flared painfully in my hands and fingers. Unable to take NSAIDs, I feared the pain would linger. Surprisingly, the spirulina worked—within days, my pain lessened noticeably! As someone who does a lot of hand sewing and farm chores, this relief has been incredible, reducing my pain by about 90%! I take three tablets daily—two in the morning and one before bed. I highly recommend it for anyone with arthritis.

Excellent! It aids in combating various viral and bacterial infections, while also lowering blood sugar levels in diabetes. The supplement regulates blood pressure, boosts heart health, and improves memory and vision. It's effective for weight management and assists thyroid function. Protecting against many diseases, it also treats anaemia by replenishing iron levels and enhances brain function. Additionally, it restores intestinal microflora, aids digestion, speeds up metabolism, and cleanses the body of accumulated toxins, preventing the spread of cancerous cells.

Bacterial Infection details

31 people found this helpful

Dizziness details

Of course, I recommend this spirulina algae! I discovered it about eight years ago when I was planning to conceive. Since then, I've been taking it in cycles. I suggest taking it three times daily, regardless of meals (I've not experienced any stomach issues). A month on, a month off, repeated in spring and autumn is sufficient. The benefits: I feel better, my dizziness has stopped, and my complexion has improved considerably. After completing the course, it’s as though I feel ten years younger. I’ll continue to use it and recommend it to you. Sometimes I switch brands.

Прекрасно! Helps fight obesity. Cleans organisms well.

Obesity details

Whooping Cough details

Highly effective remedy

This is very effective for cough, and I buy it for my husband's meals.

Anxiety details

Perfect!!! It activates all day and calms my anxiety.

Cancer details

Spirulina shows promise in cancer treatment

Based on 16 Researches

Hassanin SO, Hegab AMM, Mekky RH, Said MA, Khalil MG, et al. Combining In Vitro, In Vivo, and Network Pharmacology Assays to Identify Targets and Molecular Mechanisms of Spirulina-Derived Biomolecules against Breast Cancer. Mar Drugs. 2024;22. doi:10.3390/md22070328

We investigated how Spirulina might combat breast cancer using an animal model and a human cell line.

When given to animals, Spirulina increased antioxidants and reduced tumor growth.

It caused changes at the cellular level, promoting cancer cell death and impacting key growth pathways.

The study identified several compounds in Spirulina that target specific proteins, suggesting it could play a significant role in breast cancer treatment.

Cancer treatment benefits

Most Useful Review

290 people found this helpful

Spirulina is a source of plant protein and B vitamins, particularly B12, making it beneficial for vegetarians. While it aids in weight loss, healthy eating and exercise are still essential. Spirulina boosts the immune system, helps with anemia by increasing hemoglobin, and has anti-cancer properties through phycocyanin, which can inhibit cancer cell growth. It is vital to use it in moderation and consider its effects on the body.

Updated: Apr 2025

Cholecystitis details

Supports gallbladder function

2 people found this helpful

I have been consuming spirulina for a long time, and it benefits the gallbladder. I appreciate this brand, as the price reflects the quality. I recommend it; if my review was helpful, please give a thumbs up, thanks!

16 people found this helpful

Headache details

Wonderful! Spirulina has become my favourite supplement for increasing ferritin levels. I struggled with headaches for a long time until discovering my ferritin was as low as 3 when it should be around 50. After taking iron for a year, I found little improvement, yet after starting spirulina, my ferritin rose to an impressive 55, and my headaches are now a thing of the past. The size and dosage are optimal, and the quality is excellent!

Autoimmune Disorder details

Spirulina shows promise for arthritis

Based on 7 Researches

Patro N, Sharma A, Kariaya K, Patro I. Spirulina platensis protects neurons via suppression of glial activation and peripheral sensitization leading to restoration of motor function in collagen-induced arthritic rats. Indian J Exp Biol. 2011;49:739.

We investigated the effects of spirulina platensis on collagen-induced arthritis in rats. Over 25 days, treatment with spirulina significantly reduced peripheral sensitization and improved motor function.

It also demonstrated neuroprotective effects by lowering the accumulation of certain proteins in the spinal cord, which is linked to nerve protection from inflammation.

Our findings highlight the potential of spirulina in managing symptoms of arthritis, although further research is needed to confirm its effectiveness in autoimmune disorders in humans.

Less pain

Most Useful Review

26 people found this helpful

I started taking these vitamins to address painful menstruation. After a month, I noticed I no longer experienced any pain. Highly recommend! I now take two tablets a day and find them to be my favourite dietary supplements. I also no longer feel heaviness in my stomach.

Updated: Mar 2026

Chemotherapy details

Significant improvement

I’ve been consuming spirulina for three years. Previously, I struggled to gain weight; after suffering from chickenpox at 25, I remained quite thin. At the start of the pandemic, I began taking it and managed to gain some weight, while various issues like hair loss and brittle nails disappeared. Tragically, my mother was diagnosed with cancer earlier this summer. As we undergo radiation therapy and prepare for chemotherapy, her hemoglobin dropped to 64. After beginning spirulina, it remarkably rose to 120 within just two days, astonishing her doctor! We remain hopeful for what lies ahead. Wishing everyone good health!

Health noticeably improved

Chronic Fatigue Syndrome details

Spirulina serves as a fantastic remedy for chronic fatigue! Regular use of this all-natural product, rich in minerals, vitamins, and amino acids, has markedly improved my health. Most importantly, my appetite has decreased and I now have increased energy throughout the day!

Cold details

Effective immunity boost

216 people found this helpful

Spirulina significantly boosts immunity and is a great sorbent that helps with colds, aiding me to recover faster. It has become a staple in our first aid kit.

Spirulina polysaccharide aids constipation

Constipation details

Ma H, Xiong H, Zhu X, Ji C, Xue J, et al. Polysaccharide from Spirulina platensis ameliorates diphenoxylate-induced constipation symptoms in mice. Int J Biol Macromol. 2019;133:1090. doi:10.1016/j.ijbiomac.2019.04.209

We examined how a polysaccharide from Spirulina platensis could alleviate constipation and impact gut health in mice. After treating diphenoxylate-induced constipation with varying doses of the polysaccharide, we observed improvements in defecation patterns and a boost in beneficial gut bacteria.

The treatment led to increased activity of acetyl cholinesterase and improved intestinal villus health. Importantly, the study suggests that this polysaccharide could have a role in constipation therapies, though results stem from animal research.

Energy booster

Most Useful Review

286 people found this helpful

This product is exceptional for boosting digestive health and energy levels. As vegetarians, we seek ways to enhance our protein and B vitamin intake. Having tried various spirulina products, I finally found this capsule form, which I take daily. It has improved my regularity significantly, especially after having a baby. It has energised me throughout this time, making a noticeable difference in my routine.

Updated: Mar 2026

Depression details

Alleviated spring depression

I was pleasantly surprised by the effectiveness! After taking spirulina with Vitamin D, I felt lighter, my skin improved, and I experienced a superb mood, without the dreadful spring depression caused by vitamin deficiency. While others were sluggish at work, I felt cheerful. I will continue taking spirulina regularly!

Intestinal improvement noted

Food Poisoning details

After a year of consuming spirulina, my intestinal health has greatly improved, aiding my body significantly in eliminating food poisoning.

I ordered Spirulina for my mother-in-law, who has hypothyroidism. It's effective in lowering blood pressure and perfectly cleanses the body while providing important microelements. However, it’s essential to avoid using it if you have autoimmune diseases, as it may exacerbate those conditions. Overall, it's very beneficial for her health.

Hypothyroidism details

Insomnia details

Increased energy levels

92 people found this helpful

I've been using this vitamin for a couple of months, and it has significantly improved my energy, stamina, and overall mood. Most notably, it has positively impacted my sleep quality. I often suffer from episodes of insomnia that hinder my performance at work the following day. It has truly made a difference, comparable to what many experience from time to time.

Weight Loss details

Spirulina aids weight loss

Possibly Effective

Based on 6 Researches

Moradi S, Ziaei R, Foshati S, Mohammadi H, Nachvak SM, et al. Effects of Spirulina supplementation on obesity: A systematic review and meta-analysis of randomized clinical trials. Complement Ther Med. 2019;47:102211. doi:10.1016/j.ctim.2019.102211

We explored the effects of Spirulina supplementation on weight loss through a systematic review and meta-analysis of randomized clinical trials.

By analyzing data from various databases, we found that Spirulina significantly reduces body weight, particularly in obese participants.

On average, obese individuals lost about 2.06 kg, while overweight participants lost about 1.28 kg. Additionally, Spirulina contributed to reductions in body fat percentage and waist circumference, even though it didn't impact body mass index or waist-to-hip ratio.

Sweet cravings reduced

Most Useful Review

70 people found this helpful

Spirulina has become my unique remedy for weight loss and skin health. It effectively curbs sweet cravings, leading to visible results in just a few weeks — my skin has cleared and energy levels have surged. I also mix it into face masks for additional benefits. The organic formula ensures that I consume nothing artificial. It's a natural aid for maintaining ethical dietary practices and achieving a healthier physique while enhancing beauty.

Updated: Mar 2026

Common Cold details

Spirulina improves infant respiratory health

Masuda K, Chitundu M. Multiple micronutrient supplementation using spirulina platensis and infant growth, morbidity, and motor development: Evidence from a randomized trial in Zambia. PLoS One. 2019;14:e0211693. doi:10.1371/journal.pone.0211693

We explored the effects of spirulina supplementation on the health of Zambian infants. In a randomized trial, 501 infants were given either soya-maize porridge alone or the same porridge with spirulina for a year.

While physical growth was similar in both groups, those who received spirulina experienced a notable decrease in coughing and showed improved motor milestones, such as walking independently.

This suggests that spirulina can play a role in reducing respiratory issues and enhancing motor development in infants, making it a promising addition to complementary feeding.

Cold resistance

Most Useful Review

77 people found this helpful

I’ve consumed spirulina throughout winter, and it greatly boosts the body’s resistance to the common cold. I trust the Now Foods brand and have used it for two autumn-winter seasons. The tablets are large and have a pleasant marine aroma.

Updated: Apr 2025

Eczema details

Significant improvement

I have severe eczema and followed Dr. Gu Xiaopei's advice by taking onion, green tea, spirulina, and Beta-Glucan for about two weeks. Along with Chinese medicine, my eczema has improved significantly. I encourage others in need to give it a try.

11 people found this helpful

Hair Loss details

I swear by this spirulina! The quality is exceptional, and it has significantly helped my hair loss, strengthened my nails, and cleansed my body of toxins. I took it during my pregnancy and saw no adverse effects, just benefits. It’s a fantastic product!

Effective for cholesterol

High Cholesterol details

I have been using it with great success in managing my cholesterol levels.

Lung Cancer details

Women's health benefits

I purchased it due to its benefits for women's health. It possesses numerous anti-cancer and anti-ageing properties. Consistent consumption is necessary.

Anemia details

Spirulina boosts iron absorption effectively

Based on 8 Researches

Gao F, Guo W, Zeng M, Feng Y, Feng G. Effect of microalgae as iron supplements on iron-deficiency anemia in rats. Food Funct. 2019;10:723. doi:10.1039/c8fo01834k

We aimed to explore the potential of microalgae, particularly Spirulina, as a solution for iron-deficiency anemia. In a study with rats, different microalgal diets were tested to evaluate their effects on hemoglobin levels.

Our findings showed that rats fed high concentrations of Spirulina had the best hemoglobin regeneration, outperforming other groups. Notably, Spirulina provided more intestinal nanosized iron than other microalgal variations. This indicates that Spirulina could be an effective iron supplement for addressing anemia.

Positive improvement

Most Useful Review

1 people found this helpful

I've been taking spirulina for almost two years and I find it excellent! My anemia has improved significantly; I'm very satisfied with the quality of this brand and I never run out! ☺️

Updated: Apr 2025

Sleep Apnea details

I combine it with the NOW Foods Chlorella. It helps me have a good night's sleep.

Spirulina shows promise for OSMF

Bloating details

Mulk BS, Deshpande P, Velpula N, Chappidi V, Chintamaneni RL, et al. Spirulina and pentoxyfilline - a novel approach for treatment of oral submucous fibrosis. J Clin Diagn Res. 2013;7:3048. doi:10.7860/JCDR/2013/7085.3849

We examined the impact of spirulina and pentoxyfilline on oral submucous fibrosis, a condition affecting many in Asia. In our study, we randomly divided 40 patients into two groups: one received pentoxyfilline and the other spirulina for three months. While both treatments showed significant improvement, spirulina emerged as the superior option, notably reducing burning sensations without any adverse effects. In contrast, pentoxyfilline caused side effects, including stomach bloating and nausea. Our findings suggest spirulina could be a valuable addition to managing oral submucous fibrosis.

Easier consumption

Most Useful Review

I decided to try spirulina in capsules. I've been taking it for a long time; it is a lifesaver for my digestive system, and bloating has disappeared. Capsules are far easier to consume than powder, and the benefits are the same. I recommend spirulina to everyone; it’s full of nutrients, and it has greatly helped my diabetic mother.

Updated: Mar 2026

Blood Clot details

Spirulina shows promise against clots

Based on 2 Researches

Choi JH, Kim S, Kim SJ. Spirulan from blue-green algae inhibits fibrin and blood clots: its potent antithrombotic effects. J Biochem Mol Toxicol. 2015;29:240. doi:10.1002/jbt.21690

We explored the effects of spirulan, derived from blue-green algae, on blood clots through in vitro and in vivo tests. Our findings showed that spirulan exhibits notable antithrombotic properties, effectively breaking down fibrin and reducing the action of certain clotting proteins.

Tests indicated successful interactions with blood clots and demonstrated its potential to prevent clot formation in animal models. Overall, spirulan shows promise as a natural agent for tackling thrombosis-related conditions, suggesting it could play a significant role in future treatments.

Prevents clots

Most Useful Review

5 people found this helpful

Spirulina boosts the immune system and its high iron content aids heart health, preventing anemia and blood clots. A nutrient-rich superfood, it's easy to take due to the small capsule size. I will definitely order more!

Updated: Mar 2026

Brain Tumor details

Spirulina is an impressive alga I consume daily, taking three tablets with each meal. Its remarkable nutrient profile includes protein, vitamins, and essential minerals, all of which contribute to developing healthy nervous tissue. It’s also a superior source of beta-carotene, providing protective benefits for the brain and eyes.

Cardiovascular Disease details