Spirulina is the densest at roughly 60% protein by dry weight, moringa is the best all-rounder, and alfalfa is the one for vitamin K and bone health. But here is the number nobody leads with: one teaspoon of spirulina is about 1.8 g of protein. None of these replaces dal, paneer or eggs, and anyone selling them as a protein supplement is misleading you.
What they genuinely do is add complete protein and dense micronutrients to a meal that was mostly carbohydrate. That is worth having — it is just a smaller claim.
Side by Side
| Spirulina | Moringa | Alfalfa | |
|---|---|---|---|
| Protein (dry weight) | ~60% | ~25% | ~20% |
| Complete protein | Yes | Yes | Yes |
| Strongest in | Protein, iron | Calcium, vitamin C, vitamin A | Vitamin K, calcium |
| Taste | Strongly of the sea | Mild, grassy | Mild, grassy |
| Autoimmune | Avoid | Fine | Avoid |
| On warfarin | Ask doctor | Ask doctor | Do not take |
If You Buy Only One
Moringa. It is the best all-rounder, it is far easier to drink than spirulina, and it has the fewest contraindications of the three. It also contains iron and vitamin C in the same leaf, which means it helps you absorb its own iron.
Choose spirulina instead if protein and iron density are specifically what you want, and you can handle the taste.
The Spirulina Taste Problem
Most people who quit spirulina quit because of the taste, not the effect. It tastes strongly of the sea.
- Citrus masks it best — orange juice, sweet lime, or water with lemon and a little honey
- Banana smoothie covers it almost completely
- Do not mix it into plain warm milk. This is the combination people describe as undrinkable.
Orange juice also solves the iron-absorption question at the same time.
Three Warnings Before You Buy
None of these is a B12 source
Spirulina contains pseudo-B12 — an analogue your body cannot use. Worse, it can occupy B12 receptors and can inflate a B12 blood test, so a deficient person looks fine on paper.
If you are vegetarian or vegan, get a serum B12 test and use a proper B12 supplement. See Vitamin B12 for Vegetarians in India.
Alfalfa and warfarin do not mix
Alfalfa is exceptionally high in vitamin K, which is exactly what warfarin blocks. Taking it directly opposes your medication and the risk is a clot or stroke. This is one of the best-documented herb–drug interactions there is. If you are on warfarin, do not buy alfalfa.
Autoimmune conditions
Spirulina and alfalfa both stimulate immune activity. Alfalfa's L-canavanine has been associated with lupus flares. Moringa is the safe choice here.
Source Matters Most With Spirulina
Spirulina is grown in water and absorbs what is in it. Algae from contaminated ponds can accumulate heavy metals and, in some cases, microcystins from other species growing alongside.
This is the one supplement where a very low price is a genuine warning sign. Buy from a source that can tell you where it was grown.
How Much to Buy
1 tsp (3–5 g) daily is about 100–150 g a month. For a proper 12-week run, 500 g.
If you are new to spirulina, buy 100 g first — the taste is genuinely divisive and a 500 g bag you cannot drink is money gone. Moringa is mild enough to buy larger straight away.
Frequently Asked Questions
Can I take all three?
Moringa and spirulina pair well — different micronutrient profiles. Add alfalfa only if none of the cautions apply.
Do these help with weight loss?
No. They are nutrient sources, not fat burners.
Will they give me energy?
Not like caffeine. If you were low in iron or under-nourished, correcting that over weeks reduces tiredness. If you were not deficient, expect nothing dramatic.
Safe in pregnancy?
Moringa leaf is traditionally used, but avoid moringa root and bark entirely. Spirulina and alfalfa lack safety data at supplement doses. Ask your doctor.
Shop
Spirulina · Moringa · Alfalfa · Superfood range
Food supplements, not medicines. These statements have not been evaluated by the Food and Drug Administration. Not intended to diagnose, treat, cure or prevent any disease. Do NOT take alfalfa if you are on warfarin or have an autoimmune condition.
