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Short answer: In U.S. FDA/EPA guidance, safe tuna intake depends on the species, your age and life stage, serving size, and what other fish you eat that week. Canned light tuna (usually skipjack) is the lower-mercury option; albacore/white and yellowfin require tighter limits; bigeye tuna is on the avoid list for people who are or might become pregnant, people who are breastfeeding, and children. A typical adult serving is 4 ounces before cooking.
The chart below is U.S. advice, not a universal personal mercury threshold. Adults outside the pregnancy, breastfeeding, and childhood groups should use the broader fish recommendation and consider their body weight, diet, medical history, and local advisories.
The U.S. tuna limits at a glance
FDA and EPA group tuna by expected mercury exposure. The weekly limits in this table are the chart’s advice for people who might become pregnant, are pregnant, are breastfeeding, and children; they are not an individualized prescription for every adult.
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|---|---|---|
| Canned light tuna, including skipjack | Best Choice | Two to three servings; a typical adult serving is 4 ounces before cooking |
| Albacore (white) tuna, canned or fresh/frozen | Good Choice | One serving, with no other fish that week |
| Yellowfin tuna | Good Choice | One serving, with no other fish that week |
| Bigeye tuna | Choice to Avoid | Avoid for the chart’s target groups |
These categories come from the FDA consumer chart and the agency’s tuna-specific FAQ. “Tuna” on a menu or package is not precise enough by itself; identify the species or form before applying a limit.
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Why the species changes the answer
Canned light tuna is usually smaller, shorter-lived fish
FDA says canned light tuna is usually made from smaller tuna, most often skipjack. Smaller fish generally have had less time to accumulate methylmercury, so canned light tuna sits in the Best Choices category. A can labeled “light” refers to the tuna type and color, not a reduced-fat or reduced-calorie version.
Albacore is larger and typically has more mercury
Albacore, also called white tuna, is larger and lives longer than the fish commonly used for canned light tuna. FDA states that albacore typically contains three times more mercury than canned light tuna. That difference is why white tuna has a separate, stricter category even when both products are shelf-stable cans. The official wording is: “Albacore tuna, also known as white tuna, typically contains three times more mercury than canned light tuna.”
Yellowfin and bigeye need special attention
Yellowfin is a Good Choice in the FDA/EPA chart. Bigeye is listed as a Choice to Avoid for people who might become pregnant, pregnant or breastfeeding people, and children. Restaurant labels can be incomplete, especially for ahi or sashimi, so ask which species was served when the distinction affects your decision.
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If you are pregnant, planning pregnancy, or breastfeeding
The FDA/EPA chart is specifically designed for these situations because developing babies can be particularly vulnerable to methylmercury. FDA encourages anyone who might become pregnant within the next year to follow the advice now: mercury leaves the body slowly, so changing fish choices only after pregnancy begins may not reduce exposure immediately.
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Use the species category, then count every fish serving
For Best Choices, stay within the chart’s weekly serving range and use the four-ounce adult serving as the reference. If you choose a Good Choice such as albacore or yellowfin, treat it as your fish serving for that week rather than adding other fish. The advice also encourages variety: rotate lower-mercury fish instead of relying on one tuna type every day.
What if you eat more than three fish servings?
FDA says that when more than three fish servings are eaten in a week, the additional servings should come from Best Choices. After a higher-mercury choice, select lower-mercury fish in following weeks. This is a planning rule, not a reason to panic about a single meal.
The general fish target is not a tuna quota
The Dietary Guidelines for Americans encourage pregnant and breastfeeding people to eat 8 to 12 ounces of fish per week, but that total should be built from lower-mercury choices. It does not mean that 8 to 12 ounces of albacore or yellowfin is automatically appropriate.
How much tuna is appropriate for children?
FDA recommends two weekly servings from a variety of Best Choices for children ages 1 through 11. The serving is smaller than an adult portion and rises with age:
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| Child’s age | Approximate serving size | Weekly pattern |
|---|---|---|
| 1–3 years | 1 ounce | Two servings from Best Choices |
| 4–7 years | 2 ounces | Two servings from Best Choices |
| 8–10 years | 3 ounces | Two servings from Best Choices |
| 11 years and older | 4 ounces | Two servings from Best Choices |
Children should not be fed fish in the Choices to Avoid category. Some dietary patterns call for more than two servings of fish, but FDA/EPA says those higher amounts should come from a smaller subset of especially low-mercury Best Choices; tuna is not in that smaller subset. Check the child’s age and the species on the package rather than assuming every “tuna” product qualifies.
Adults who are not pregnant or breastfeeding
For other adults, FDA points to the Dietary Guidelines’ general recommendation of at least 8 ounces of fish per week on a 2,000-calorie diet. That is a fish recommendation, not a personalized maximum amount of tuna. The FDA/EPA chart was developed using an average adult weight of 165 pounds, so a smaller adult may need smaller portions or fewer weekly Best Choice servings to keep exposure within the advice.
FDA’s weight-based examples
FDA gives two examples for adults below the 165-pound average: about 2.5 ounces of a Best Choice three times in a week, or 4 ounces twice in a week. These examples illustrate how portion size and frequency can be adjusted; they are not a universal formula for every body weight.
When to ask a clinician
Ask a qualified clinician for individualized advice if you have a condition that affects mercury handling, eat fish caught from a contaminated area, consume large amounts of tuna every week, or are worried about a particular exposure. Do not infer mercury poisoning, or a personal “safe limit,” from the chart alone.
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How to plan tuna alongside other fish
Count the whole week, not just cans
A tuna sandwich, poke bowl, sushi serving, tuna steak, and fish used in a mixed dish all count toward your fish intake. Keep a simple weekly list of species and approximate portions. If the species is unknown, do not automatically classify it as canned light tuna; ask the seller or choose a clearly labeled Best Choice instead.
Build variety into the menu
Variety helps prevent your weekly intake from being dominated by one species. FDA identifies canned salmon and sardines as affordable Best Choices that can replace some tuna meals. The relevant question is the species category, not whether a product is canned, frozen, fresh, or served at a restaurant.
Use smaller portions when you combine fish meals
If you want fish on several days, divide the week’s amount into smaller portions and favor Best Choices. A four-ounce serving is measured before cooking; cooking changes weight through moisture loss but does not remove mercury. A kitchen scale is useful when a tuna steak or restaurant portion is substantially larger than the reference serving.
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What to do with locally caught tuna or other fish
Commercial labels do not replace local guidance for fish caught by family or friends. Check the advisory for the exact water and species through your state, tribal, or territorial health or environmental agency.
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If no local advisory exists, FDA says adults should limit locally caught fish to one serving of up to 6 ounces that week and eat no other fish. Local waters can have different contaminants, and an advisory may impose stricter limits for children or pregnancy. Do not apply the canned-light-tuna category to an unidentified fish caught locally.
How to read a tuna label and menu
- Find the species or product form. Look for “canned light,” “skipjack,” “albacore,” “white,” or “yellowfin.” If only “tuna” appears, seek clarification.
- Separate light from white. “Light” and “white” are not interchangeable categories: canned light is generally the Best Choice, while albacore/white is a Good Choice.
- Estimate the edible portion. Compare the amount you will eat with the four-ounce adult reference or the child-size amounts in the table.
- Record other fish. Include meals eaten away from home and fish in salads, sushi, casseroles, or prepared foods.
- Check location-specific notices. For recreational catch, read the current local advisory before deciding how much to serve.
If you ate more tuna than planned
One week of higher fish consumption generally does not change body methylmercury levels very much, according to FDA’s general mercury information. Do not attempt to “detox” or induce vomiting. Instead, return to lower-mercury Best Choices, vary species, and follow the weekly guidance in subsequent weeks.
Contact a clinician or poison-information service if you have a specific exposure concern, symptoms, or a medically high-risk situation. Intake alone cannot diagnose mercury toxicity, and symptoms can have many causes.
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What the official guidance does—and does not—answer
The FDA/EPA framework is a population-level consumer guide built around mercury exposure and the benefits of eating fish. It gives categories, portions, and weekly patterns, but it does not establish one identical tuna ceiling for every adult. Weight, life stage, species, preparation, other fish, and local contamination all matter.
For the underlying methodology, FDA explains how the advice was developed in its technical information page. EPA’s consumer page, updated October 1, 2026, provides the joint advice and links to the current chart: EPA-FDA Advice about Eating Fish and Shellfish.
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