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While she's also tried "more intense treatments for prevention and correction" like Ultherapy (non-invasive skin-tightening and lifting) and Thermage (radiofrequency contouring), the star decided they weren't right for her.
"They're both a little too painful for me, but they're definitely two gold standards for anti-aging," Williams said.
The star also opened up about turning 40 last June, which she admitted wasn't as big of a deal as people make it seem. "I'm really fine with it. I'm really fortunate to have really good genes, honestly. I think a lot of times it comes down to that and how you take care of yourself," Williams said.