The safety and health effects of stevia are based on research and certifications from authoritative bodies such as the Codex Alimentarius Commission (CAC), the U.S. Food and Drug Administration (FDA), and the European Food Safety Authority (EFSA). The core conclusions and details are as follows:

I. Safety: Widely Recognized by Authoritative Institutions

GRAS Certification and Food Additive Approval

High-purity steviol glycosides (mainly containing Rebaudioside A, M, D, etc., with a purity of ≥95%) have been listed on the GRAS (Generally Recognized as Safe) list by the U.S. FDA and approved for use as a food additive. They have also received approval as a sweetener for various food and beverage products from the EFSA and China's National Health Commission.

Note: Stevia leaves and crude extracts are not approved as food additives. They are only permitted as dietary supplement ingredients in some countries, as their complex impurity profiles lack sufficient safety data.

Toxicological Research Conclusions

Multiple long-term animal studies have shown that high-purity steviol glycosides have no acute toxicity, genotoxicity, or carcinogenicity, and do not cause reproductive or developmental abnormalities. Both the FDA and EFSA have established an Acceptable Daily Intake (ADI) level: calculated as steviol equivalents, the ADI is 0–4 mg/kg of body weight. Normal dietary intake is far below this limit, providing solid safety assurance.

Applicability to Special Populations

Diabetic patients: Safe for consumption. Steviol glycosides do not participate in blood glucose metabolism and will not cause blood sugar fluctuations.

Pregnant/lactating women: No confirmed health risks when consumed within the ADI range, but moderate intake is recommended.

Children: Safe for normal consumption of stevia-containing foods and beverages. It can serve as a substitute for sucrose, reducing the risk of dental caries.

II. Health Effects: Advantages and Potential Considerations

(1) Positive Health Effects

Low-calorie, Aids Weight Management

Steviol glycosides contain almost no calories. Replacing added sugars such as sucrose and fructose with stevia can reduce total calorie intake, helping with weight management and obesity prevention.

Does Not Affect Blood Glucose, Suitable for Diabetic Populations

The human body cannot metabolize or absorb steviol glycosides, so they do not stimulate insulin secretion. This makes stevia an ideal sweetener alternative for diabetics, aiding in controlling dietary added sugar intake.

Reduces the Risk of Dental Caries

Unlike sucrose, steviol glycosides are not fermented by oral bacteria to produce acidic substances that erode tooth enamel, thus lowering the incidence of dental caries.

Potential Auxiliary Health Benefits (Research Stage)

Some basic research indicates that steviol glycosides may have mild blood pressure-lowering effects (in hypertensive individuals) and potential lipid-regulating properties. However, these effects have only been observed in high-dose experiments and have not been translated into clinical recommendations, and cannot be regarded as "medicinal effects".

(2) Potential Considerations and Controversies

Gastrointestinal Reactions (When Consumed Excessively)

A small number of people may experience gastrointestinal discomfort such as bloating, diarrhea, and nausea when consuming excessive amounts of stevia (far exceeding the ADI limit). This is related to the fermentation of steviol glycosides in the intestines and is rarely observed at normal dietary doses.

Flavor Characteristics May Affect Eating Experience

Some steviol glycosides (e.g., early Rebaudioside A products) have a slight bitter or metallic aftertaste that may affect food flavor. However, high-purity new ingredients such as Rebaudioside M and D, along with advancements in compounding technology, have significantly improved this issue.

Controversy Over "Sweetener Dependence"

Some studies suggest that long-term consumption of non-nutritive sweeteners may alter taste preferences, increasing cravings for sweet foods. However, research conclusions on this topic are inconsistent, and the mainstream view currently holds that moderate intake does not lead to significant dependence.

III. Core Summary

High-purity steviol glycosides are

safe, low-calorie natural sweeteners

. Consuming them within the approved dosage poses no health risks to the vast majority of people, and they offer health benefits such as blood sugar control and weight management. It is important to avoid excessive intake and prioritize high-purity products