Foods Highest in Cystine

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Top 50 whole foods per 100g, from USDA Standard Reference and Foundation databases

Egg, white, dried, stabilized, glucose reduced ranks #1 of 50 for Cystine, at 2.2G per 100g.

What These Cystine Rankings Mean

This ranking surfaces the top 50 whole foods for Cystine, pulled from USDA Standard Reference Legacy and Foundation databases. Those two sources intentionally exclude branded and processed entries, which keeps the list focused on raw ingredients where nutrient content reflects the food itself rather than fortification or recipe adjustments. There is no established FDA Daily Value for Cystine, so amounts are reported in absolute terms (G per 100g edible portion).

At the top of the ranking sits Egg, white, dried, stabilized, glucose reduced, delivering 2.2G per 100g. The top three (Egg, white, dried, stabilized, glucose reduced, Egg, white, dried, Egg, white, dried, powder, stabilized, glucose reduced) together form a practical "big lever" set, foods where a single serving meaningfully moves daily intake. The visual bars beside each row scale against the top food, so you can see at a glance whether a lower-ranked food is still a strong source or a distant runner-up.

Because this page excludes branded products, it is the right tool for comparing whole-food cooking choices rather than packaged-food shopping decisions, for those, the per-food pages and the branded search tools cover the same nutrient at product level. All values are reported per 100g edible portion, which means the raw numbers can be directly compared but real-world servings differ (a 100g portion of spinach is very different from 100g of almonds by volume). The nutrition guides linked below explain how to translate % DV and per-100g figures into practical daily targets and how to read nutrition labels when comparing whole foods to their processed equivalents.

→ Compare the top three Cystine sources side-by-side

# Food Amount % DV
1 Egg, white, dried, stabilized, glucose reduced 2.2 G -
2 Egg, white, dried 2.1 G -
3 Egg, white, dried, powder, stabilized, glucose reduced 2.0 G -
4 Egg, white, dried, flakes, stabilized, glucose reduced 1.9 G -
5 Seeds, cottonseed flour, low fat (glandless) 1.3 G -
6 Seeds, cottonseed meal, partially defatted (glandless) 1.3 G -
7 Egg, whole, dried, stabilized, glucose reduced 1.1 G -
8 Seeds, cottonseed flour, partially defatted (glandless) 1.1 G -
9 Egg, whole, dried 1.1 G -
10 Soy protein isolate 1.0 G -
11 Soy protein isolate, potassium type 1.0 G -
12 Seeds, sesame flour, low-fat 1.0 G -
13 Seeds, sunflower seed flour, partially defatted 0.95 G -
14 Soy protein concentrate, produced by alcohol extraction 0.89 G -
15 Soy protein concentrate, produced by acid wash 0.89 G -
16 Seeds, cottonseed kernels, roasted (glandless) 0.85 G -
17 Seeds, sesame flour, partially defatted 0.81 G -
18 Soy flour, defatted 0.76 G -
19 Beef, variety meats and by-products, spleen, cooked, braised 0.73 G -
20 Soy meal, defatted, raw 0.72 G -
21 Beverages, Protein powder soy based 0.72 G -
22 Seeds, safflower seed meal, partially defatted 0.69 G -
23 Spices, mustard seed, ground 0.68 G -
24 Fish, cod, Atlantic, dried and salted 0.67 G -
25 Seeds, hemp seed, hulled 0.67 G -
26 Peanut flour, defatted 0.67 G -
27 Tofu, dried-frozen (koyadofu) 0.66 G -
28 Tofu, dried-frozen (koyadofu), prepared with calcium sulfate 0.66 G -
29 Seaweed, spirulina, dried 0.66 G -
30 Soybeans, mature seeds, raw 0.66 G -
31 Soybeans, mature seeds, dry roasted 0.64 G -
32 Meat extender 0.63 G -
33 Seeds, sesame flour, high-fat 0.62 G -
34 Egg, yolk, dried 0.59 G -
35 Oat bran, raw 0.58 G -
36 Cereals ready-to-eat, wheat germ, toasted, plain 0.58 G -
37 Soybeans, mature seeds, roasted, salted 0.57 G -
38 Soybeans, mature seeds, roasted, no salt added 0.57 G -
39 Soy flour, full-fat, roasted 0.56 G -
40 Pork, fresh, variety meats and by-products, kidneys, cooked, braised 0.56 G -
41 Soy flour, full-fat, raw 0.56 G -
42 Winged beans, mature seeds, raw 0.55 G -
43 Spaghetti, protein-fortified, dry, enriched (n x 6.25) 0.54 G -
44 Beef, variety meats and by-products, spleen, raw 0.53 G -
45 Snacks, pork skins, plain 0.53 G -
46 Beef, variety meats and by-products, liver, cooked, braised 0.53 G -
47 Snacks, pork skins, barbecue-flavor 0.51 G -
48 Fish, whitefish, dried (Alaska Native) 0.50 G -
49 Leavening agents, yeast, baker's, active dry 0.50 G -
50 Fish, roe, mixed species, cooked, dry heat 0.50 G -

Frequently Asked Questions

What food is highest in Cystine?

Egg, white, dried, stabilized, glucose reduced is the food highest in Cystine, with 2.2G per 100g.

How much Cystine do I need per day?

There is no established FDA Daily Value for Cystine. Consult a healthcare professional for guidance on appropriate intake levels.

What are good whole food sources of Cystine?

Top whole food sources of Cystine include Egg, white, dried, stabilized, glucose reduced, Egg, white, dried, Egg, white, dried, powder, stabilized, glucose reduced, and more. These rankings are based on USDA Standard Reference and Foundation food data, measured per 100g edible portion.

Source: USDA FoodData Central — Standard Reference Legacy and Foundation databases. Branded and processed products are excluded. All values per 100g edible portion.
Source: FDA Daily Value reference — Cystine (no established DV) based on a 2,000-calorie diet.
This information is for reference only and should not replace professional dietary advice.

Read our methodology , how this data is sourced, computed, and verified.