Tempeh is classified as Limited under standard keto guidelines — a 3-ounce serving of plain tempeh contains approximately 7–9g of net carbohydrates, manageable within keto budgets in controlled portions.
Key Takeaways
- Tempeh is classified as Limited under standard keto guidelines.
- A 3-ounce serving contains approximately 7–9g net carbohydrates — higher than most animal proteins.
- Tofu is the lower-carbohydrate plant protein alternative (~1–2g net carbs per serving).
- Plain unflavored tempeh is the keto-referenced variety; flavored products require label review.
Classification Overview
Tempeh is a fermented soybean product with a significant carbohydrate content compared to animal protein sources, requiring careful portion management for keto compliance.
Net Carbohydrate Content
Plain soy tempeh contains approximately 9g of total carbohydrates and 1–2g of fiber per 3-ounce (85g) serving, yielding approximately 7–9g of net carbohydrates. The fermentation process does not substantially reduce the carbohydrate content of the soybean base. This is markedly higher than typical keto protein sources (meat, fish, eggs), which contain 0g of carbohydrates per serving.
Comparison with Tofu
Firm tofu contains approximately 1–2g of net carbohydrates per 3-ounce serving — roughly 4–5 times fewer than tempeh. Both are soy-derived proteins, but the different processing methods result in significantly different carbohydrate profiles. Published keto references more frequently include tofu as a keto-compatible plant protein due to its lower carbohydrate content.
Protein Content
Despite its higher carbohydrate content, tempeh provides approximately 17–19g of protein per 3-ounce serving — among the highest protein densities of plant-based foods. The combination of protein and carbohydrate content places it in the Limited category: usable in keto eating but requiring portion tracking and carbohydrate tracking.
Flavored Varieties
Pre-marinated and flavored tempeh products may contain additional carbohydrates from teriyaki sauce, maple, or other sweet marinades. Plain tempeh is commonly referenced for keto use; flavored varieties can be label-reviewed.
Summary
Tempeh is classified as Limited under standard keto guidelines. Plain soy tempeh contains approximately 7–9g of net carbohydrates per 3-ounce serving — manageable within keto carbohydrate budgets in controlled portions, but higher than most animal protein sources. Tofu provides a lower-carbohydrate plant protein alternative. Published keto references include plain tempeh as a usable plant protein with the note that it requires careful serving size management within the carbohydrate budget.
This is reference-only classification content and does not constitute medical or dietary advice.