Quick answer

Store vitamins and supplements in a cool, dry, dark place, ideally below 25°C (77°F) and away from direct sun. Keep them in the original bottle with the lid tightly closed and the silica desiccant pack inside. The bathroom cabinet is usually a poor choice because of shower heat and steam. If your supplements have changed color, smell, or texture, or the expiry date has passed, discard them.

Why heat, light and humidity break down supplements

Heat, light and moisture are the three main causes of supplement degradation. Heat can accelerate chemical breakdown, light can degrade light-sensitive vitamins, and humidity can cause tablets to absorb moisture, leading to crumbling, stickiness, or mold growth. For example, vitamin C and some B vitamins are easily damaged by heat and light. Omega oils can turn rancid when exposed to heat and oxygen. Gummies are especially vulnerable to humidity because they attract moisture from the air, becoming sticky and prone to microbial growth.

Where to store supplements at home

Choose a location that stays cool, dry and dark. A bedroom closet, a kitchen cupboard away from the stove, oven, and dishwasher, or a dedicated pantry shelf works well. Avoid the refrigerator unless the label specifically says to refrigerate, because opening and closing the door creates temperature and humidity fluctuations that can damage tablets and gummies. Keep supplements out of direct sunlight and away from windowsills, radiators, and heating vents.

How to store vitamins properly in humid climates

In humid climates, moisture control is critical. Keep the desiccant pack in the bottle; it absorbs excess moisture. If your area is very humid, consider storing bottles inside an airtight container with additional silica gel packets. Never store supplements in the bathroom, above the kettle, or near any source of steam. If tablets start to stick together or show spots, they have likely absorbed moisture and should be discarded.

Keeping gummies fresh

Gummies require extra care because their chewy texture attracts moisture. Always reseal the container tightly after each use. If the gummies become sticky or fused together, they are no longer fresh. Storing them in a cool, dry cupboard is best. Some people prefer to refrigerate gummies in hot, humid weather, but check the label first; refrigeration can make them hard and less pleasant to chew. For example, Ultra Vitamin D Gummies are vegetarian and vegan, but like all gummies, they should be kept away from heat and humidity to maintain texture and potency.

Supplement shelf life tips: when to keep and when to discard

Always check the expiry date on the bottle. Expired supplements may have reduced potency, and in some cases, harmful degradation products can form. Even before the expiry date, if you notice a change in color, smell, or texture, it is safer to replace them. Tablets that are crumbly, cracked, or discolored, capsules that are stuck together or leaking, and gummies that are melted or sticky should be thrown away. Proper storage can help you get the most out of your supplements, but it does not make them last forever.

Diagnose your supplement storage problem

  • Tablets are stuck together or crumbly: Likely cause: humidity. Tablets absorbed moisture from the air, possibly because the lid was not sealed tightly or they were stored in a damp place like a bathroom. Move them to a dry, cool cupboard and keep the desiccant pack in the bottle. If they remain stuck or show mold, discard them.
  • Gummies are sticky or melted: Likely cause: heat and humidity. Gummies attract moisture and soften when warm. Store in a cool, dry place and reseal tightly. If they are fused into a block or have an off smell, replace them.
  • Capsules are cracked or leaking: Likely cause: heat or light exposure. Capsules can become brittle or melt, leading to leaks. Check the expiry date and discard if damaged. Store future bottles away from direct sun and heat sources.
  • Supplements have changed color or smell: Likely cause: oxidation or degradation. This can happen with oils, vitamins, and some herbal ingredients. Do not use them. Replace with a fresh bottle and follow proper storage to prevent recurrence.

Product storage notes

  • Wellman Plus Omega 3-6-9: Wellman Plus Omega 3-6-9 combines a multivitamin blend with omega-3-6-9 oils in tablet form. The omega oils can degrade with heat and light, so store this product in a cool, dark place to maintain freshness.
  • Ultra Vitamin D Gummies: Ultra Vitamin D Gummies are a vegetarian and vegan gummy with 1000 IU vitamin D per gummy. Gummies are prone to moisture damage; keep the container tightly closed and store away from humid areas.
  • Neuromind Original: Neuromind Original is a tablet formulated to support normal cognitive function. Tablets can absorb moisture and lose potency if exposed to humidity, so proper storage is essential.