Best Spirulina Supplements of 2025

"I tell everyone about this because I refuse to gatekeep this best-kept secret! This stuff is my key to liveliness, energy, and mental health. I can really tell the difference when I don't take it. It gives me energy and kept me healthy during COVID. I don't notice any smell or taste, or if there is, it's very subtle. They are easy to swallow. I really trust the NOW brand to deliver what they promise, without added ingredients. It's a great product!"

"I've heard amazing health benefits about spirulina. I tried the powder, but it was awful. This product requires taking three pills daily. They are huge and a bit tough to swallow, but if you take your time and drink lots of water, it's doable. Within a week, I've noticed more energy and brain clarity. I sleep better and have fewer sugar cravings. I'm mainly taking this for general health and to lose some weight. So far, I'm very pleased!"

"My midwife suggested this supplement to help boost my iron and hemoglobin during pregnancy. It works well, but it might not be strong enough for those with anemia. The smell is a bit intimidating, like alfalfa hay, and it tastes like dirty grass, but it goes down easily enough with some water."

"I've ordered my second package of these tablets because they offer a noticeable energy boost. After a few weeks, I saw less hair loss, and now my hair is shinier and fuller. I'm excited to see how my cholesterol levels change at my annual exam!"

"I've been taking spirulina for three years without any issues. It's a powerful supplement packed with nutrients that supports my immune system and overall health. Starting with a small dose is crucial, but I highly recommend it!"

"This spirulina has been a fantastic addition to my daily routine! Since I started taking it, I've noticed improvements in my energy and focus. I mix it into my smoothies, and I genuinely recommend it for anyone looking for a natural superfood!"

"I've found this to be a quality product that I use daily alongside my vitamin regimen. I would definitely recommend it for anyone looking to improve their gut health."

"I purchased this product to help detoxify my diet, and I can say it has been quite effective."

"I really enjoy these supplements, but I noticed that the recommended dose is seven pills. I prefer to take just two and add spirulina powder for extra benefits. Overall, it's good value and quality."

"I find the spirulina to be excellent. It’s great quality and doesn’t leave my hands green or upset my stomach, unlike other low-quality products. I regularly buy this and would definitely recommend it!"

"This product is a great solution for my kids who don’t eat veggies. I like that it also comes in powder form!"

"I have used them and think they are fabulous, but I’m curious if a pregnant woman can use them?"

"This stuff is so good for my body. I take six pills every morning, and I can feel the difference in my energy levels when I skip them. They are effective and while they're a bit pricey, I find them definitely worth it!"

"I've been using spirulina for years, and this brand is particularly good. It has improved my vision, energy, and mood. Yes, it may turn your poop green, but that's just the chlorophyll working. I take more than the suggested serving size because I see greater benefits that way!"

"These Spirulina tablets have a strong ocean smell, confirming their organic origin from Hawaii. They work wonders, and I highly recommend giving them a try to see for yourself. They truly are the very best!"

"I've been taking this Spirulina and it's really great. I'm almost out and I can feel the positive effects."

"I decided to try this organic Spirulina from Nutracost again after some time. I can't test its organic claim, but I definitely notice more energy and focus when I take it daily. The six capsules are easy to swallow, and they have become a foundational part of my nutrition routine."

"The container is huge! I wasn't expecting such a large size, but it's a great value. I pour some into a small bottle for convenience. I mix it into my breakfast smoothie, so I don't taste it, and it does exactly what I need it to."

"I've been using this spirulina supplement for a few weeks, and I’m really impressed! My energy levels have significantly increased, and I feel more alert and focused all day. It's easy to take with a mild flavor and no aftertaste. I've also noticed my digestion has improved, and my overall health feels better. The quality is top-notch, with no fillers or artificial ingredients. I’m very happy with this purchase!"

"I started taking this product three days ago, and it’s already working for me. I feel more relaxed and calm, and my sleep has improved. Thank you!"

"This is an excellent product, and I highly recommend it for the gym. I would definitely buy it again!"

“I absolutely love this product! I mix it with a banana to make it a bit sweeter, and it's good to go!”

“I've found this spirulina powder to be a fantastic detoxifying health food. It's great for smoothies and really helps with my immunity!”

“The taste is quite fishy and strong, so I do have to add a lot of sugar to make it palatable. Cleaning up can be tricky, but I’m committed to making it work because it’s supposed to be one of the healthiest foods out there!”

“So far, I’m really pleased with the quality and value of the 32oz bag. My only concern is the packaging; it would be better if it were more compact. I ended up using a jar to avoid getting it all over my hands.”

“I’ve been using this to make food for my aquarium fish and snails, and they go absolutely crazy for it! They’re growing up fast and healthy, so I highly recommend it for anyone looking for aquarium-safe food ingredients.”

"I bought this to help balance my hormones and improve my postnatal acne. It's easy to swallow, thanks to the spearmint flavor. After almost two weeks, I've seen a huge difference in my skin. I've also added it to my diet for hormonal balance and to help detox heavy metals from my body."

"I discovered these pills through a book by Susan Cohen. While I’m not a doctor, I’ve noticed moderate success in managing my Type II diabetes. It's important to monitor my blood sugar closely, but overall, I'm happy with the product. It even seems to minimize some side effects of Metformin."

"After taking these for a few months, I can say I feel the difference. I do intermittent fasting, and when I take them before the gym, I notice a subtle boost in energy and focus. It’s a balanced feeling, similar to drinking green tea, and I recommend trying it along with a multivitamin."

"I've made these NOW Spirulina tablets a crucial part of my daily health routine. Each tablet offers 500 mg of organic spirulina, packed with vitamins and minerals, which has noticeably boosted my energy levels and overall vitality. Plus, with 500 tablets per bottle, it’s excellent value!"

"I’ve been taking these for several months now alongside other supplements like milk thistle and turmeric. I'm hopeful about my upcoming blood work showing improvements related to NAFL. Overall, I feel they are beneficial."

"I initially bought three bottles, thinking they were capsules. While I was disappointed, I’ve found that these tablets do provide a clear difference in my energy level. The fishy smell and taste aren't pleasant, but taking them with food helps."