Item	Description; yes (1 score) / no (0 score)
1	Are aims clear and achieved?
2	Are reliable sources of information used?
3	Is the information provided balanced and unbiased?
4	Are additional sources of information listed for patient reference?
5	Any areas of uncertainty/controversy mentioned?

Table 1: Modified DISCERN questionnaire

Value	Description; yes (1 score) / no (0 score)
Authorship	The authors and contributors, the institutions to which they adhere, and their credentials should be provided.
Disclosure	Conflicts of Interest, Funding, Sponsorship, Advertising, Support, and Video Ownership should be fully disclosed.
Attribution	All copyrighted data should be clearly listed, and references andsources for all content should be stated.
Currency	The initial date of posted content and dates of update should beprovided.

Table 2: Journal of the American Medical Association Benchmark Criteria Scoring System

Table 3: Comparison of engagement and information quality metrics across video creator types.

Correlation	Spearman's rho (95% CI)	P-value
Video Power Index - Reviewer1_discern_total	0.361 (0.203, 0.500)	<0.001
Video Power Index - Reviewer2_discern_total	0.316 (0.155, 0.462)	<0.001
Video Power Index - Reviewer1_jama_total	0.188 (0.019, 0.347)	0.025
Video Power Index - Reviewer2_jama_total	-0.007 (-0.177, 0.164)	0.937

Table 4: Correlation between Video Power Index (VPI) and information quality scores assessed by DISCERN and JAMA benchmarks.

Table 1

Table 2

Table 3

Table 4

Figure 1

Figure 2

Figure 3

Figure 1: Percentage distribution of Striae Distensae-related TikTok videos by creator type.

Figure 2: Percentage distribution of total views for SD TikTok content by creator type.

Figure 3: Percentage distribution of likes of SD TikTok content by creator type.