Wellness Guides: Supplements, Cooking Oils and Energy Drinks Checked

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Wellness products and health claims, checked against the research.

We check supplements, drinks, cooking oils and gadgets against studies, third-party lab results and the label, not the marketing. Pick a topic below. Our guides are for information only, not medical advice (see our health disclaimer).

Cooking oils and fats

Which oil to use depends on the job: everyday cooking, deep frying or a quick egg.

• Healthiest oil to cook with: seven oils ranked
• Best oil for frying: picks for deep frying and pan frying
• Healthiest oil to fry eggs: olive oil, avocado oil or butter
• Is beef tallow healthy?: what the science says for cooking
• Beef tallow for skin: benefits, risks and the vitamin myth

Supplements

Supplements are lightly regulated, so we look for third-party testing and what the studies actually show.

• Best creatine gummies: which ones passed lab tests
• Best creatine for women: why many gummies failed lab tests
• Creatine for menopause and women over 40: what studies show
• Protein powder without lead: how to avoid lead and other heavy metals
• Magnesium for sleep: does it work, and is glycinate best?
• Magnesium glycinate vs citrate: which form to take for sleep or constipation
• Magnesium glycinate side effects: what’s normal, the 350 mg limit and who should avoid it
• Types of magnesium: a chart of glycinate, citrate, oxide, threonate, malate and more, with what the evidence shows
• Does creatine make you bloated?: water weight vs stomach bloating, how long it lasts and how to avoid it
• Cortisol face: is it real?: what doctors call moon face, why your face is puffy and how cortisol is tested
• Is 10mg of melatonin too much?: what dose studies show

Energy drinks

• Healthy energy drinks: 19 popular cans scored on caffeine, sugar and sweeteners
• Is Celsius bad for you?: the label, the studies and the lawsuits
• Is Prime healthy?: the label, the lawsuits and the 200mg can

Sleep and stress

• Do stress relief products work?: what research says about five popular buys

Wellness gadgets

• Fitbit Air review: is it worth it, and how accurate is it vs Whoop?
• Best Fitbit Air bands: official, third-party and bicep bands
• Do red light therapy devices work?: what the research supports
• Cooling products that work: what helps in a heatwave

How we research: we don’t lab-test products. We read studies, third-party lab results, labels and official guidance, and we link our sources in every guide. Read our editorial policy.