The British actress, 48, who has been married to husband Edward Abel Smith (formally known as Ned ‘Rocknroll) for 12 years, says she feels ‘sexy’ again after having the treatment.
And the Titanic star is encouraging other women who have seen their libido dip to look into their testosterone levels, believing that could be the reason why they’re put off sex.
Testosterone replacement therapy (known as TPT) is a prescription treatment that helps restore testosterone levels.
The mother-of-three said: ‘Sometimes women have a real dip in libido because there might be stuff going on with their thyroid.
‘There could also be stuff going on with your level of testosterone.
‘A lot of people don’t know this but women have testosterone in their body, when it runs out – like eggs – it’s gone, and once it’s gone you have to replace it and that is something that can be done and you’ll feel sexy again… I know.’
Kate was giving advice during a mini-agony aunt section in the How To Fail podcast.
A listener had asked for help to rediscover their sex drive.
Kate continued: ‘I would suggest for your physical self, have your thyroid levels checked and your testosterone levels checked well because those things could have a direct impact on how you’re actually feeling.
‘It’s not your fault, our bodies are weird and they behave in strange ways especially as we get older.
‘So there could be a dip in those hormonal levels for you that is contributing much more than you think to how you’re feeling about having sex with your boyfriend, so I would definitely go ahead and do that.’
Kate’s appearance has been the subject of intense scrutiny throughout her career, but now she’s never been more confident in her appearance as she believes women get ‘sexier’ as they get older.
Asked how she feels about her body now, the Oscar-winner says: ‘I’m great with it – I think I look flipping amazing. We have to own it, this is the thing.
‘We’re so conditioned, women, in our 40s to think ‘oh well I’m creeping closer to the end’.
You think you’re going into menopause and you’ll stop having sex, your boobs are going to sag and your skin’s going to go crapey. First of all, so what? It’s just conditioning.