Nutrikonverter Guide
Nutrients Your Thai Label Wants You to Get More Of
5 min read
Thai RDI values checked against Notification 445, Annex 3: September 2026
Most of a nutrition label's attention goes to what to limit: fat, sugar, sodium. A handful of nutrients are singled out for the opposite reason, because most people don't get enough of them. This guide covers which ones, why they're called out, and the daily targets Thai regulation sets.
Thai RDI figures and required-nutrient status below are taken directly from Ministry of Public Health Notification No. 445 (panel-format clause and Annex 3). This is a plain-language summary; the official notification governs.
Fiber isn't always on the label
Dietary fiber has a Thai RDI and can be the subject of a claim, but it is a mandatory panel line in only one case: when the product's energy value was calculated with a method that accounts for fiber's calories separately. Most labels don't show it by default. If it isn't printed on the panel in front of you, check the ingredient list or ask the producer.
The nutrients called out for getting more of
Thai food regulation recognizes a specific physiological role for each of these.
Dietary Fiber (ใยอาหาร)
25 g / dayIncreases fecal bulk in the digestive tract and stimulates bowel movement. This is the function the Thai FDA recognizes for the nutrient under its health-claim rules.
A product needs ≥10% Thai RDI (2.5g) per serving to claim "good source of fiber," or ≥20% (5g) to claim "high in fiber."
Calcium (แคลเซียม)
1,000 mg / daySupports bone structure and density. It is one of the most commonly under-consumed minerals in a typical diet, which is why the label tracks it.
Needs ≥15% Thai RDI (150mg) per serving for "good source of calcium," or ≥30% (300mg) for "high in calcium."
Iron (ธาตุเหล็ก)
22 mg / dayRequired for normal red blood cell formation and oxygen transport in the blood. Deficiency is one of the more common nutrient gaps globally, especially among women.
Needs ≥15% Thai RDI (3.3mg) per serving for "good source of iron," or ≥30% (6.6mg) for "high in iron."
Vitamin A (วิตามินเอ)
800 mcg RAE / daySupports normal vision, immune function, skin, and mucous membrane maintenance, plus a role in body growth. It is one of the broadest-acting vitamins tracked on Thai labels.
Needs ≥15% Thai RDI (120mcg RAE) per serving for "good source," or ≥30% (240mcg RAE) for "high in."
Vitamin D (วิตามินดี)
15 mcg / dayWorks alongside calcium for bone health and is one of the nutrients people most commonly fall short on, since dietary sources are limited and sun exposure varies widely by lifestyle.
Needs ≥15% Thai RDI (2.25mcg) per serving for "good source," or ≥30% (4.5mcg) for "high in."
Potassium (โพแทสเซียม)
3,500 mg / dayWorks opposite sodium in the body and is one of only two minerals (alongside sodium) required on every standard Thai nutrition panel.
Needs ≥15% Thai RDI (525mg) per serving for "good source," or ≥30% (1,050mg) for "high in."
The same 5% / 20% rule, applied in reverse
The %Thai RDI column works the same way whether you're limiting or seeking out a nutrient: 5% or less per serving is low, 20% or more is high. For sodium or saturated fat, you want low. For these nutrients, you want high.
Formatting these nutrients on your own label?
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