Tofu, Tempeh and Seitan: A Beginner's Comparison

Before the numbers, it helps to know what you are eating. These three are made in completely different ways, which explains why they taste and behave so differently in the pan.

• Tofu is made by curdling soy milk and pressing it into blocks, a bit like making cheese from soy. It is mild, soft, and takes on whatever flavour you cook it with.
• Tempeh is made from whole soybeans that are fermented and pressed into a firm cake. It keeps the whole bean, so it has more fibre, and fermentation gives it a nutty, savoury taste.
• Seitan is made from wheat gluten, the protein left when you wash the starch out of wheat dough. It is dense, chewy, and the most meat-like of the three.

So two of them are soy foods and one is a wheat food. That single fact drives most of the differences that follow, from protein quality to who can eat them.

Here is how they stack up per 100 grams. The protein spread is wide, so if raw protein density is your priority the ranking is clear.

Seitan wins on protein per calorie, which is why it is popular with people chasing high protein on plants. Tempeh brings the most fibre and a fuller nutrient profile from the whole bean. Tofu is the lowest in protein of the three but the most versatile and the easiest to start with. None is a bad choice, they simply suit different plates.

One detail that often gets missed: much of the tofu sold in shops is set with calcium, which turns it into a quietly useful source of calcium and iron as well as protein. Check the label for calcium sulphate or calcium chloride and you get a bonus mineral hit for free. Tempeh, because it keeps the whole fermented bean, also carries a decent amount of iron and a range of B vitamins. So while tofu looks the weakest on the protein line, it earns points back on the mineral side, and both soy foods do more for you than the headline gram count suggests.

This is where the base ingredient really matters, so it is worth being clear before you cook for anyone.

• Coeliac disease or gluten sensitivity: avoid seitan entirely, it is pure gluten. Tofu and tempeh are naturally gluten free, though check tempeh labels for added grains.
• Soy allergy: avoid tofu and tempeh; seitan is fine.
• Nut-free, dairy-free needs: all three are naturally free of nuts and dairy, which makes them useful allergy-friendly proteins.
• Everyone else: all three are great, and rotating them gives you variety in taste and nutrients.

You may have heard that soy foods like tofu and tempeh mess with hormones, especially that they lower testosterone in men because they contain plant compounds called isoflavones. It is a persistent myth, and the evidence does not support it. A 2021 analysis pooling dozens of clinical studies found that neither soy nor its isoflavones lowered testosterone or raised oestrogen in men.

In normal food amounts, tofu and tempeh are simply high-quality protein. Soy is also one of the few complete plant proteins, which makes it especially handy for building and keeping muscle on a plant-based diet. If you enjoy it, there is no hormonal reason to hold back.

Most "I hate tofu" stories are really "I cooked it wrong" stories. Each of these three rewards a different technique.

1. Tofu: press, then flavour. Press firm tofu to squeeze out water, then marinate or coat it. Bake, air-fry, or pan-fry until the edges crisp. Dry surface plus high heat equals a texture people actually like.
2. Tempeh: steam, then season. Steaming or simmering tempeh for a few minutes softens its slight bitterness. Then slice, marinate, and pan-fry. It soaks up sauce beautifully and holds its shape.
3. Seitan: keep it saucy. Seitan is chewy and can dry out, so cook it fast and finish with plenty of sauce. It shines in stir-fries, sandwiches, and stews as a meat stand-in.
4. Hit your protein target. Aim for a solid palm-to-fist-sized portion at each meal. A 150 g block of tempeh or seitan alone can deliver 30 grams or more of protein.