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Harvard health letter

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48 results
Dec 8, 2025
Most Viewed

Is methylene blue safe to use as a supplement? What are the potential benefits, side effects and health risks?

Methylene blue is an FDA-approved drug for methemoglobinemia and has controlled medical uses (injection), but its popularity as an over‑the‑counter “nootropic” or daily supplement is unsupported and c...

Nov 14, 2025
Most Viewed

what does low body temperature mean after high temp with the flu/covid

A fall from a high fever to a low or below‑normal temperature after influenza or COVID-19 can be normal part of recovery — fevers commonly resolve on their own and body temperature varies by person an...

Nov 20, 2025
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What are the health implications of ejaculating too frequently in men?

Scientific evidence does not show that frequent ejaculation causes major physical harm and may be associated with a lower long‑term risk of prostate cancer: large prospective analyses found men report...

Dec 17, 2025

Is prevagen an actual memory inhancer

Prevagen, a dietary supplement whose active ingredient is the jellyfish-derived protein apoaequorin, is widely marketed as a memory enhancer, but independent science and courts have concluded its effi...

Dec 10, 2025

How does prostate stimulation affect erectile function and libido in older men?

Early clinical and popular sources report that prostate stimulation can produce intense orgasms and sometimes improve sexual satisfaction even without an erection; controlled medical evidence that it ...

Nov 15, 2025

Long-term success rates of knee replacement surgery

Large registry reviews and systematic analyses show most total knee replacements (TKR) perform very well long-term: roughly 90–95% survive 10 years, about 80–82% survive 20–25 years, and pooled regist...

Nov 15, 2025

What are the long-term effects of aspartame and acesulfame potassium?

Large cohort studies and reviews link long‑term consumption of aspartame and acesulfame‑K to small but measurable increases in some cancer and cardiovascular risks, and experimental work suggests effe...

Dec 17, 2025

How quickly do sexual side effects from SSRIs and SNRIs typically appear and do they resolve after stopping treatment?

Sexual side effects from SSRIs and SNRIs commonly appear soon after starting treatment — often within days to weeks — and many patients experience improvement while still on or after stopping the drug...

Dec 8, 2025

Which specific tinnitus remedies did Mehmet Oz recommend on The Dr. Oz Show and in his books?

Mehmet Oz’s public advice on tinnitus—across syndicated columns and TV appearances—focuses on emerging brain-based therapies (like transcranial magnetic stimulation and brain-training/neuroplastic app...

Dec 8, 2025

Which tinnitus treatments did dr. oz demonstrate on his show and what evidence supports them?

Mehmet Oz’s coverage of tinnitus over the years has highlighted brain‑focused approaches (brain training, sound therapy, and experimental neuromodulation like transcranial magnetic stimulation) and pr...

Dec 16, 2025

Which common medications shorten or prolong orgasm duration in men and women?

Selective-serotonergic antidepressants (SSRIs and SNRIs) are the most consistently cited common drugs that delay or blunt orgasm in people of all genders; multiple reviews and patient guides report re...

Nov 13, 2025

Are there non-drug alternatives to treat erectile dysfunction?

There are multiple established non‑drug options to treat erectile dysfunction (ED), ranging from lifestyle and psychological therapies to devices, surgery, and emerging procedures; . High‑quality revi...

Nov 1, 2025

What are the potential side effects of using Memo Master for Alzheimer's disease?

The available materials conflate at least two different things called “Memo” or “Memo Master”: prescription memantine (an FDA‑approved drug for moderate‑to‑severe Alzheimer’s) and a commercial supplem...

Jan 19, 2026

Which of dr. oz's tinnitus remedies lack scientific evidence and why?

Dr. Oz has discussed a range of purported tinnitus “fixes” over time — from quick rituals and topical home remedies to supplements and devices — but many of those specific remedies lack solid scientif...

Dec 13, 2025

What clinical evidence supports Memory Lift's safety and efficacy for memory improvement?

Claims that Memory Lift is “clinically validated” or proven safe and effective rest almost entirely on company marketing, third‑party review sites, and press releases rather than independent, peer‑rev...

Dec 10, 2025

What lifestyle changes most effectively reduce arterial plaque progression?

Intensive lipid-lowering — especially driving LDL‑C to very low levels — is the clearest, trial-backed means to halt and in many cases shrink atherosclerotic plaque, with randomized imaging trials sho...

Dec 7, 2025

What are the signs of infection after prostate stimulation and when should I see a doctor?

After prostate stimulation, signs that suggest an infection mirror typical prostatitis symptoms: sudden fever, chills, body aches, painful or frequent urination, pelvic/perineal pain, and difficulty p...

Dec 5, 2025

Is dopamine addiction real?

Dopamine itself is a well‑documented neurochemical involved in reward, motivation and learning, and changes in dopamine systems are a core feature of substance addictions (e.g., decreased receptor ava...

Nov 30, 2025

Do age or health conditions change orgasm intensity and refractory period with prostate stimulation?

Age and some health conditions are commonly reported to change orgasm quality and the refractory period with prostate stimulation: sources say prostate orgasms are often described as more intense and ...

Nov 26, 2025

Can pelvic floor exercises increase intensity of sexual pleasure for people who ejaculate?

Evidence in clinical reviews and major health outlets says pelvic floor training can improve sexual function for people who ejaculate by improving erection quality, ejaculation control, and orgasmic i...